Solvothermal reactions of MnCl_2·4H_2O with(pyridin-2-yl)methyl 4-(2-(4-((pyridin-2-yl)methoxy)phenyl)diazenyl)benzoate(L1) via an in situ ligand transformation reaction produced a new coordination polymer, {[Mn_...Solvothermal reactions of MnCl_2·4H_2O with(pyridin-2-yl)methyl 4-(2-(4-((pyridin-2-yl)methoxy)phenyl)diazenyl)benzoate(L1) via an in situ ligand transformation reaction produced a new coordination polymer, {[Mn_(2.5)Cl_3L_2(H_2O)]·H_2O}_n(1, where HL = 4-(2-(4-((pyridin-2-yl)methoxy)phenyl)diazenyl)benzoic acid). The L1 ligand was decomposed in situ to L^- which was coordinated with Mn(Ⅱ) to form compound 1 in the solvothermal synthesis process. Complex 1 was characterized by IR spectroscopy, powder X-ray diffraction and single-crystal X-ray diffraction.Compound 1 possesses a 2D network. In addition, stability and photoluminescent property of 1 were also investigated.展开更多
One two-dimensional coordination polymer with a formula of {[Cd(L)(imidazole)(H_2O)](H_2O)}n(1) was obtained by the synthetic reactions in aqueous solution using a newly synthesized H_2L(H_2L = methyl-3-hydroxy-5-carb...One two-dimensional coordination polymer with a formula of {[Cd(L)(imidazole)(H_2O)](H_2O)}n(1) was obtained by the synthetic reactions in aqueous solution using a newly synthesized H_2L(H_2L = methyl-3-hydroxy-5-carboxy-2-thiophenecarboxylate) ligand.Compound1 crystallizes in monoclinic system,space group C2/c with a = 18.3176(11),b = 8.5366(9),c =8.4152(5) ?,β = 101.789(6)o,V = 2797.1(3) ?~3,D_c = 1.979 g/cm^3,C_(10)H_(12)N_2O_7SCd,Mr = 416.68 F(000) = 1648,μ = 1.745 mm^(-1),F(000) = 1648,the final R = 0.0323 and wR = 0.0604 for 2604 observed reflections with I > 2s(I).Structure analyses reveal that the compound is constructed by dinuclear Cd(Ⅱ) clusters bridged by two hydroxyl oxygens of L^(2-)anions,which features a two-dimensional network with 4-connected sql topology.Furthermore,the compound exhibits high thermal stability and intense fluorescent emission,and could be explored for potentia luminescent materials.展开更多
A new coordination polymer, {[Cd(OPY)_2(tdc)(H_2O)]·H2 O}n(OPY = 4,4?-(oxybis(4,1-phenylene))dipyridine, H2 tdc = thiophene-2,5-dicarboxylic acid), has been synthesized hydrothermally based on a V-shaped ligand O...A new coordination polymer, {[Cd(OPY)_2(tdc)(H_2O)]·H2 O}n(OPY = 4,4?-(oxybis(4,1-phenylene))dipyridine, H2 tdc = thiophene-2,5-dicarboxylic acid), has been synthesized hydrothermally based on a V-shaped ligand OPY. The structure was fully characterized by elemental analysis, FT-IR spectroscopy, and X-ray single-crystal diffraction analysis. In1, two OPY ligands and one water molecule acted as terminal ligands coordinating to Cd^(2+) cation to form [Cd(OPY)_2 H_2O]^(2+) units, which are then linked by tdc2-ligands to generate a one-dimensional chain. Every two adjacent chains linked by extensive O–H···O hydrogen bonds constitute one-dimensional double-chains, and such chains are extended into two-dimensional layers via O–H···N hydrogen bonds. These layers are further connected to form a three-dimensional supramolecular architecture via π-π stacking interactions. In addition, the thermal stability and solid state fluorescence property of 1 were also investigated.展开更多
The synthesis,structure and luminescent property of a tetranuclear gold(Ⅰ)complex with doubly bridging diethyldithiocarbamate(Et2dtc)and 1,1-bis(diphenylphosphino)ethene((Ph2P)2C=CH2)are described.The complex crystal...The synthesis,structure and luminescent property of a tetranuclear gold(Ⅰ)complex with doubly bridging diethyldithiocarbamate(Et2dtc)and 1,1-bis(diphenylphosphino)ethene((Ph2P)2C=CH2)are described.The complex crystallizes in monoclinic space group C2/c with a=26.785(7),b=25.654(6),c=12.277(3)A,β=106.879(5)°,V=8073(4)A^3,Z=8,C31H32Au2F6NO3P2S2Sb,Mr=1222.32,Dc=2.011 g/cm^3,F(000)=4592,Rint=0.0529,T=293(2)K,μ=8.157 mm^(-1),the final R=0.0464 and wR=0.1444 for 5804 observed reflections with I>2σ(Ⅰ).The intramolecular and intermolecular Au¨Au distances are 2.8670(9)and 3.2367(9)A,respectively.Weak emission appears at 517 nm at room temperature in the solid state.展开更多
A new structure with the molecular formula [CdL]n was formed by CdSO4 with 4-carboxymethoxy phenylacetic acid (H2L) through the hydrothermal method. The complex was characterized by elemental analysis and infrared spe...A new structure with the molecular formula [CdL]n was formed by CdSO4 with 4-carboxymethoxy phenylacetic acid (H2L) through the hydrothermal method. The complex was characterized by elemental analysis and infrared spectroscopy. The structure of the complex was determined by single-crystal X-ray diffraction, which is of monoclinic system, space group P21/c with a = 10.3887(2), b = 7.10710(10), c = 14.7212(2) , β = 120.6940(10)°, V = 934.65(3) 3, Dc = 2.278 g·cm-3, Z = 4, F(000) = 624, S = 1.022, the final R = 0.0187 and wR = 0.0487 for 2000 observer reflections (Ⅰ > 2σ(Ⅰ)). The center metal ion Cd(Ⅱ) in the complex is six-coordinated in a distorted octahedral geometry, and is connected with L ligands to form a 3D fishing net structure, which is a novel (3,6) network topology. The luminescence of the complex has been investigated, and the result reveals that it displays luminescent property in the voilet region.展开更多
A novel 3D hetero-nuclear framework,namely [K_2Cd_5(Hbptc)_4(H_2O)_(12)·12H_2O]_n(1,H4 bptc = biphenyl-2,3,3?,5?-tetracarboxylic acid),was obtained by hydrothermal reaction. X-ray singlecrystal structure analysis...A novel 3D hetero-nuclear framework,namely [K_2Cd_5(Hbptc)_4(H_2O)_(12)·12H_2O]_n(1,H4 bptc = biphenyl-2,3,3?,5?-tetracarboxylic acid),was obtained by hydrothermal reaction. X-ray singlecrystal structure analysis reveals that polymer 1 crystallizes in orthorhombic,space group Pbcn with a = 26.6152(13),b = 11.7449(5),c = 29.5923(14) ?,V = 9250.3(7) ?~3,C_(64)H_(76)Cd_5K_2O_(56),Mr = 2381.44,Dc = 1.710 g/cm^3,μ(MoK α) = 1.323 mm^(-1),F(000) = 4744,Z = 4,the final R = 0.0668 and wR = 0.1135 for 10613 observed reflections(I > 2σ(I)). Polymer 1 displays a 3D network that is built on the unprecedented heterobimetallic [Cd_3Cd_2K] molecular building block with a(3,4)-connected(6·8·8)2(6·6·82·82·126·126) topology which represents a rare 2-fold interpenetrating 3D framework topology network. The luminescence analyses reveal that polymer 1 shows obvious emission at room temperature in the solid state. In addition,it was also characterized by elemental,IR spectra and TG analyses.展开更多
A new hexanuclear silver(I) compound containing thiosemicarbazone with group of 3-pyridine was synthesized and structurally characterized by single-crystal X-ray diffraction,elemental analysis and fluorescence spectru...A new hexanuclear silver(I) compound containing thiosemicarbazone with group of 3-pyridine was synthesized and structurally characterized by single-crystal X-ray diffraction,elemental analysis and fluorescence spectrum.The title compound 3 crystallizes in monoclinic,space group C2/m with a = 18.6523(9),b = 24.7519(11),c = 22.4542(15) ,β = 93.4960(10)°,V = 10347.4(10)3,C68H104Ag6N30O8S6,Mr = 2309.39,Dc = 1.482g/cm3,μ(MoKα) = 1.293 mm-1,F(000) = 4656,Z = 4,the final R = 0.0544 and wR = 0.1580 for 6733 observed reflections(I > 2σ(I)).In the structure,two Ag6L36(L3 = pyridine-3-carboxaldehyde thiosemicarbazone) clusters are contained.In each cluster,the S atom of ligand L3 served as a triply bridged chelator to connect the six silver atoms into a Ag6L36 cluster.Luminescence investigation revealed that the band at 630 nm was attributed to cluster-centered(CC) electron transfer,and those at 493 and 530 nm to the LMCT and CC transitions,respectively.展开更多
A new hexanuclear silver (I) compound 2 containing thiosemicarbazone with the group of benzene was synthesized and structurally characterized by single-crystal X-ray diffraction, elemental analysis and fluorescence sp...A new hexanuclear silver (I) compound 2 containing thiosemicarbazone with the group of benzene was synthesized and structurally characterized by single-crystal X-ray diffraction, elemental analysis and fluorescence spectrum. The title compound crystallizes in triclinic, space group P with a = 11.611(3), b = 15.610(5), c = 15.624(7) , α = 113.942(6), β = 104.520(6), γ = 104.230(4)°, V = 2304.1(14) 3, C60H77Ag6N22O4.5S6, Mr = 2018.02, Dc = 1.454 g/cm3, μ(MoKα) = 1.435 mm-1, F(000) = 1005, Z = 1, the final R = 0.0468 and wR = 0.1474 for 6608 observed reflections (I > 2σ(I)). In the structure, the S atom of the ligand L2 (L2 = benzaldehyde thiosemicarbazone) served as a triply bridged chelator to connect the six silver atoms into a Ag6L26 cluster. The luminescence property of compound 2 was investigated at room temperature.展开更多
A new hexanuclear silver(I) compound containing thiosemicarbazones with groups of 1-naphthalene was synthesized and structurally characterized by single-crystal X-ray diffraction,elemental analysis and fluorescence sp...A new hexanuclear silver(I) compound containing thiosemicarbazones with groups of 1-naphthalene was synthesized and structurally characterized by single-crystal X-ray diffraction,elemental analysis and fluorescence spectrum.The title compound crystallizes in monoclinic,space group P2 1 /c with a=16.101(4),b=24.855(7),c=14.492(4),β=109.730(5)°,V=5459(3)3,C 90 H 102 Ag 6 N 24 O 6 S 6,M r=2455.54,D c=1.494 g/cm 3,μ(MoKα)=1.228 mm-1,F(000)=2472,Z=2,the final R=0.0761 and wR=0.1507 for 5258 observed reflections (I > 2σ(I)).In the structure,the S atom of ligand L serves as a triply bridged chelator to connect the six silver atoms into a Ag 6 L 6 cluster.Luminescence investigation reveals that the compound exhibits two ligand-independent cluster-centered electron transfer bands and one ligand-dependent charge transfer band.展开更多
To explore suitable single-phase white emission phosphors for warm white light emitting diodes, a series of novel phosphors Na_3MgZr(PO_4)_3:xDy^(3+)(0 ≤ x ≤ 0.03) is prepared, and their phase purities as well as ph...To explore suitable single-phase white emission phosphors for warm white light emitting diodes, a series of novel phosphors Na_3MgZr(PO_4)_3:xDy^(3+)(0 ≤ x ≤ 0.03) is prepared, and their phase purities as well as photoluminescence properties are discussed in depth via x-ray diffraction structure refinement and photoluminescence spectrum measurement.The electronic structure properties of the Na_3MgZr(PO_4)_3host are calculated. The results reveal that Na_3MgZr(PO_4)_3 possesses a direct band gap with a band gap value of 4.917 e V. The obtained Na_3MgZr(PO_4)_3:Dy^(3+) phosphors are all well crystallized in trigonal structure with space group Rc, which has strong absorption around 365 nm and can generate warm white light emissions peaking at 487, 576, and 673 nm upon ultraviolet excitation, which are attributed to the transitions from ~4F_(9/2) to ~6H_(15/2),~6H_(13/2), and ~6H_(11/2) of Dy^(3+) ions, respectively. The optimal doping content, critical distance, decay time, and Commission International de L'Eclairage(CIE) chromaticity coordinates are investigated in Dy^(3+) ion-doped Na_3MgZr(PO_4)_3. The thermal quenching analysis shows that Na_3MgZr(PO_4)_3:Dy^(3+) has a good thermal stability, and the thermal activation energy is calculated. The performances of Na_3MgZr(PO_4)_3:Dy^(3+) make it a potential single-phase white emission phosphor for warm white light emitting diode.展开更多
The potassium terbium polyphosphate crystal KTb(PO_3)_4 has been synthesized using a high temperature solution reaction method. The structure and composition were characterized by single-crystal X-ray diffraction, pow...The potassium terbium polyphosphate crystal KTb(PO_3)_4 has been synthesized using a high temperature solution reaction method. The structure and composition were characterized by single-crystal X-ray diffraction, powder X-ray diffraction and elemental analysis. The compound crystallizes in the monoclinic space group P21/n with a=10.3182(6), b=8.9129(5), c=10.7940(6) ?, β=105.993(1)o, V=954.3 ?~3, Z=4, Mr=513.91, Dc=3.577 g/cm^3, μ=8.585 mm^(-1), F(000)=960, S=0.955,(Δρ)max=1.380,(Δρ)min=–3.428 e/?~3, the final R=0.0301 and w R=0.0400 for 2301 observed reflections with I > 2σ(I). In addition, pure powder of isostructural Rb Tb(PO_3)_4 was synthesized in order to investigate the optical property. Photoluminescence measurements show that both crystals ATb(PO_3)_4(A=K(1), Rb(2)) are promising candidates to become solid-state visible green light-emitting sources.展开更多
A novel 2D Mn(Ⅱ) coordination polymer [Mn(CH3COO)2(INH)]n(INH=isoniazid) has been synthesized in DMF solution with isoniazid and Mn(CH3COO)2 . The polymer was characterized by single-crystal X-ray diffraction analysi...A novel 2D Mn(Ⅱ) coordination polymer [Mn(CH3COO)2(INH)]n(INH=isoniazid) has been synthesized in DMF solution with isoniazid and Mn(CH3COO)2 . The polymer was characterized by single-crystal X-ray diffraction analysis, FTIR and X-ray powder diffraction (XRPD). The crystal belongs to the monoclinic system, space group P2 1 /c with a=9.3251(18), b=16.340(3), c=8.8096(17) , β=94.747(3)°, V=1337.7(4) 3 , Z=4, μ(MoKα)=1.006 mm -1 , F(000)=636, R=0.0754 and wR=0.1375 (I > 2σ(I)). In the complex, each Mn(Ⅱ) atom is coordinated to three CH3COO- groups and two INH ligands. The Mn(Ⅱ) atoms locate in a distorted coordination octahedron and are bridged by CH3COO- ions to form a 1D S shaped chain extending along the c direction. The INH molecules act as bridges to link the Mn(Ⅱ) atoms of adjacent chains and further construct a lamellar polymer. The remaining coordination site is occupied by an O atom of the other CH3COO-. The experimental results show that the title complex has good luminescence property and could be used as potential optical materials.展开更多
We report on a simple and novel method to induce Si-related oxygen-deficient defects in CaO-Al_2O_3-SiO_2 glasses by using Al metal instead of part Al_2O_3.Blue emission is observed from the glass samples.Moreover,the...We report on a simple and novel method to induce Si-related oxygen-deficient defects in CaO-Al_2O_3-SiO_2 glasses by using Al metal instead of part Al_2O_3.Blue emission is observed from the glass samples.Moreover,the quantities of the oxygen-deficient defects can be controlled by adjusting Al content. We also prepare glass samples using Al instead of part Al_2O_3 and doped with Eu^(3+) ions.Addition of Al results in reduction of Eu^(3+) ions to Eu^(2+) ions and change of the luminescence property.The investigation made on to control and characterize the defects could lead to the development of more efficient economical materials with improved properties.展开更多
A series of Eu2+-doped fluorochlorozirconate glass-ceramics were prepared by solid state reaction method. X-ray diffraction, pho-toluminescence, photo-stimulated luminescence (PSL) and the turbidity of fluorozirconate...A series of Eu2+-doped fluorochlorozirconate glass-ceramics were prepared by solid state reaction method. X-ray diffraction, pho-toluminescence, photo-stimulated luminescence (PSL) and the turbidity of fluorozirconate glass containing BaCl2 nano- and micro-crystals were measured for the samples annealed at 290 °C for 10 min. The PSL was attributed to the characteristic emission of Eu2+ in nano-crystallites of BaCl2, which formed in the glass upon annealing. The PSL efficiency of the glass ceramic was increased by increasing the concentration of BaCl2, which, however, resulted in the decreasing in the transparency of the sample. The sample turned to a semi-transparent glass ceramic or even an opaque and milky white one from a near-transparent glass. The trade-off between optical trans-parency and PSL intensity over different concentrations of BaCl2 for X-ray imaging plate applications was briefly discussed.展开更多
A new complex [Cd_2(L)_2(Cl)_2(H_2O)]_n(1) was synthesized by reacting CdCl_2·2.5 H_2O with 4-(1,2,4-triazol-4-yl)phenylacetic acid(HL) ligand.The structure of the complex was characterized by single-crystal X-ra...A new complex [Cd_2(L)_2(Cl)_2(H_2O)]_n(1) was synthesized by reacting CdCl_2·2.5 H_2O with 4-(1,2,4-triazol-4-yl)phenylacetic acid(HL) ligand.The structure of the complex was characterized by single-crystal X-ray diffraction,IR spectroscopy,elemental analysis and PXRD.Complex 1 crystallizes in triclinic,space group P21/c with a = 11.4303(8),b = 14.1792(10),c = 14.6857(10) ?,β = 96.3780(10)o,V = 2365.4(3) ?~3,Z = 4,C_(20)H_(16)Cl_2N_6O_5Cd_2,M_r = 716.09,D_c = 2.011 g/cm3,μ = 2.069 mm^(-1),S = 1.051,F(000) = 1392,the final R = 0.0458 and wR = 0.0949 for 5402 observed reflections(I > 2σ(I)).Complex 1 is a two-dimensional(2D) layer structure and non-covalent bonding interactions such as C–H···π and π···π extend the 2D to form a three-dimensional supramolecular polymer.展开更多
The silver-dppm complex, [Ag2(dppm)2(NMP)2](SbF6)2?4H2O?3CH2Cl2 1 (NMP = 2- (4-dimethylaminophenyl)imidazo(4,5-f)(1,10)phenanthroline, dppm = diphenylphosphinomethane), was synthesized and its structure was determined...The silver-dppm complex, [Ag2(dppm)2(NMP)2](SbF6)2?4H2O?3CH2Cl2 1 (NMP = 2- (4-dimethylaminophenyl)imidazo(4,5-f)(1,10)phenanthroline, dppm = diphenylphosphinomethane), was synthesized and its structure was determined by X-ray diffraction. The crystal belongs to mono- clinic, space group C2/c, Mr = 2461.61, a = 21.57(10), b = 22.48(6), c = 22.53(6) ?, β = 101.29(2)o, V = 10713(64) ?3, Z = 4, Dc = 1.526 g/cm3, μ = 1.141 mm?1, F(000) = 4920, R = 0.0664 and wR = 0.1774 for 8524 observed reflections (I > 2σ(I)). Complex 1 exists as a centrosymmetric dimmer. The two dppm molecules bridge two AgNMP moieties to form an eight-membered Ag2P4C2 metal- lacyclic ring with ligand NMP chelating to each Ag. It appears photoluminescence (λmax = 625 nm) at room temperature and makes red shift compared with free ligand NMP (λmax = 522 nm). DFT calculation indicates that the emission of 1 originates from singlet metal-perturbed ILCT excited state.展开更多
A new metal-organic coordination polymer {[Nd(tci)(H_2O)_2]·2H_2O}n(1) has been synthesized based on the flexible tricarboxylate ligand tris(2-carboxyethyl)isocyanuric acid(H3tci) and structurally characterized b...A new metal-organic coordination polymer {[Nd(tci)(H_2O)_2]·2H_2O}n(1) has been synthesized based on the flexible tricarboxylate ligand tris(2-carboxyethyl)isocyanuric acid(H3tci) and structurally characterized by single-crystal X-ray diffraction analyses, elemental analysis, infrared spectra(IR), powder X-ray diffraction(PXRD) and thermogravimetric analysis(TGA). Complex 1 crystallizes in triclinic, space group P1 with a = 9.1648(11), b = 9.3326(12), c = 12.440(2) ?, C_(12)H_(20)N_3O_(13) Nd, Mr = 558.55, V = 886.9(2) ?3, Z = 2, Dc = 2.092 g·cm-3, μ = 3.006 mm-1, F(000) = 554, 2.56<θ<25.00°, λ(Mo Kα) = 0.71073 ?, T = 293(2) K, the final R = 0.0662 and w R = 0.2071. X-ray diffraction analysis reveals that complex 1 is a two-dimensional layer, which is further assembled into a three-dimensional supramolecular architecture through hydrogen bonding interactions. The structure of complex 1 can be simplified as a rare 2-periodic uninodal {48·62} topology and a non-interpenetrating kgd topology. Furthermore, the thermal stability and photoluminescence property of 1 were investigated.展开更多
A new coordination polymer [Ni(3-bpo)(m-bdc)(C2H5OH) 2]n(1,3-bpo = 2,5-bis(3-pyridyl) -1,3,4-oxadiazole,m-H2bdc = 1,3-benzenedicarboxylic acid) was solvothermally synthesi-zed and characterized by IR,TGA and single-cr...A new coordination polymer [Ni(3-bpo)(m-bdc)(C2H5OH) 2]n(1,3-bpo = 2,5-bis(3-pyridyl) -1,3,4-oxadiazole,m-H2bdc = 1,3-benzenedicarboxylic acid) was solvothermally synthesi-zed and characterized by IR,TGA and single-crystal X-ray diffraction. The title complex crystalli-zes in the orthorhombic system,space group Pnma with a = 7.786(3) ,b = 17.253(6) ,c = 18.478(6) ,V = 2481.9(14) 3,Mr = 539.18,Dc = 1.443 g/cm3,Z = 4,R = 0.0353 and wR = 0.0589. The m-bdc and 3-bpo bridge two Ni(Ⅱ) ions through two carboxylate groups and two pyridyl groups forming a 1D infinite double-sinusoidal chain along the c axis. The photoluminescence of 1 shows a large red shift compared to that of free ligands in the solid state.展开更多
The effect of Y and Sb co-doping on the luminescence property of PbWO 4 crystals has been investigated. Compared with undoped PbWO4, the transmittance and emission peak intensity of Y∶Sb∶PbWO 4 crystals were obvious...The effect of Y and Sb co-doping on the luminescence property of PbWO 4 crystals has been investigated. Compared with undoped PbWO4, the transmittance and emission peak intensity of Y∶Sb∶PbWO 4 crystals were obviously improved. In addition, its transmittance cutoff wavelength and emission peak shifted to the shorter one. The mechanism of effect of Y and Sb on the transmittance spectra was briefly discussed. The light yield of Y∶Sb∶PbWO 4 crystals was 25p.e./MeV, which was two times of that of undoped PbWO 4. Our experiments showed that Y and Sb co-doping was a selectable method to improve the luminescence property of PbWO 4.展开更多
A new cadmium(Ⅱ) polymer based on imidazole derivative, formulated as [Cd(Hiba)2]n1, H2iba=4-(1-H-imidazol-2-yl) benzoic acid), has been synthesized under hydrothermal conditions. The compound crystallizes in triclin...A new cadmium(Ⅱ) polymer based on imidazole derivative, formulated as [Cd(Hiba)2]n1, H2iba=4-(1-H-imidazol-2-yl) benzoic acid), has been synthesized under hydrothermal conditions. The compound crystallizes in triclinic system, space group Pī with a=7.062(4), b=10.840(7), c=13.099(8), α=98.102(7), β=101.524(7), γ=107.961(7)°, V=912.3(10)3 , Z=2, Mr=486.75, Dc=1.772 Mg/m3 , μ=1.234 mm-1 , F(000)=484, the final R=0.0735 and wR=0.1739 for 2154 observed reflections with I>2σ(I). Polymer 1 consists of (Cd-Hiba)2 zigzag chains, which are further linked by hydrogen bonding to extend into a two-dimensional (2D) corrugated-shape sheet structure. The 2D structures are further connected into a 3D supramolecular edifice through hydrogen bonding. The polymer exhibits exceptional high thermal stability. The bulk purity of the materials of 1 was confirmed through the powder X-ray diffraction (PXRD) patterns. The luminescent property of polymer 1 has also been investigated.展开更多
基金financially supported by the National Natural Science Foundation of China(21302003)the Science and Technology Project of Henan Province(No.182102210200)
文摘Solvothermal reactions of MnCl_2·4H_2O with(pyridin-2-yl)methyl 4-(2-(4-((pyridin-2-yl)methoxy)phenyl)diazenyl)benzoate(L1) via an in situ ligand transformation reaction produced a new coordination polymer, {[Mn_(2.5)Cl_3L_2(H_2O)]·H_2O}_n(1, where HL = 4-(2-(4-((pyridin-2-yl)methoxy)phenyl)diazenyl)benzoic acid). The L1 ligand was decomposed in situ to L^- which was coordinated with Mn(Ⅱ) to form compound 1 in the solvothermal synthesis process. Complex 1 was characterized by IR spectroscopy, powder X-ray diffraction and single-crystal X-ray diffraction.Compound 1 possesses a 2D network. In addition, stability and photoluminescent property of 1 were also investigated.
基金supported by the National Natural Science Foundation of China(21401097)
文摘One two-dimensional coordination polymer with a formula of {[Cd(L)(imidazole)(H_2O)](H_2O)}n(1) was obtained by the synthetic reactions in aqueous solution using a newly synthesized H_2L(H_2L = methyl-3-hydroxy-5-carboxy-2-thiophenecarboxylate) ligand.Compound1 crystallizes in monoclinic system,space group C2/c with a = 18.3176(11),b = 8.5366(9),c =8.4152(5) ?,β = 101.789(6)o,V = 2797.1(3) ?~3,D_c = 1.979 g/cm^3,C_(10)H_(12)N_2O_7SCd,Mr = 416.68 F(000) = 1648,μ = 1.745 mm^(-1),F(000) = 1648,the final R = 0.0323 and wR = 0.0604 for 2604 observed reflections with I > 2s(I).Structure analyses reveal that the compound is constructed by dinuclear Cd(Ⅱ) clusters bridged by two hydroxyl oxygens of L^(2-)anions,which features a two-dimensional network with 4-connected sql topology.Furthermore,the compound exhibits high thermal stability and intense fluorescent emission,and could be explored for potentia luminescent materials.
基金Supported by the National Natural Science Foundation of China(Nos.21361023 and 21461023)
文摘A new coordination polymer, {[Cd(OPY)_2(tdc)(H_2O)]·H2 O}n(OPY = 4,4?-(oxybis(4,1-phenylene))dipyridine, H2 tdc = thiophene-2,5-dicarboxylic acid), has been synthesized hydrothermally based on a V-shaped ligand OPY. The structure was fully characterized by elemental analysis, FT-IR spectroscopy, and X-ray single-crystal diffraction analysis. In1, two OPY ligands and one water molecule acted as terminal ligands coordinating to Cd^(2+) cation to form [Cd(OPY)_2 H_2O]^(2+) units, which are then linked by tdc2-ligands to generate a one-dimensional chain. Every two adjacent chains linked by extensive O–H···O hydrogen bonds constitute one-dimensional double-chains, and such chains are extended into two-dimensional layers via O–H···N hydrogen bonds. These layers are further connected to form a three-dimensional supramolecular architecture via π-π stacking interactions. In addition, the thermal stability and solid state fluorescence property of 1 were also investigated.
基金financial supports from the NNSFC(20931006,U0934003,and 91122006)the NSF of Fujian Province(2011J01065)
文摘The synthesis,structure and luminescent property of a tetranuclear gold(Ⅰ)complex with doubly bridging diethyldithiocarbamate(Et2dtc)and 1,1-bis(diphenylphosphino)ethene((Ph2P)2C=CH2)are described.The complex crystallizes in monoclinic space group C2/c with a=26.785(7),b=25.654(6),c=12.277(3)A,β=106.879(5)°,V=8073(4)A^3,Z=8,C31H32Au2F6NO3P2S2Sb,Mr=1222.32,Dc=2.011 g/cm^3,F(000)=4592,Rint=0.0529,T=293(2)K,μ=8.157 mm^(-1),the final R=0.0464 and wR=0.1444 for 5804 observed reflections with I>2σ(Ⅰ).The intramolecular and intermolecular Au¨Au distances are 2.8670(9)and 3.2367(9)A,respectively.Weak emission appears at 517 nm at room temperature in the solid state.
基金Supported by the Natural Science Foundation of Zhejiang Province (Y12B010003)
文摘A new structure with the molecular formula [CdL]n was formed by CdSO4 with 4-carboxymethoxy phenylacetic acid (H2L) through the hydrothermal method. The complex was characterized by elemental analysis and infrared spectroscopy. The structure of the complex was determined by single-crystal X-ray diffraction, which is of monoclinic system, space group P21/c with a = 10.3887(2), b = 7.10710(10), c = 14.7212(2) , β = 120.6940(10)°, V = 934.65(3) 3, Dc = 2.278 g·cm-3, Z = 4, F(000) = 624, S = 1.022, the final R = 0.0187 and wR = 0.0487 for 2000 observer reflections (Ⅰ > 2σ(Ⅰ)). The center metal ion Cd(Ⅱ) in the complex is six-coordinated in a distorted octahedral geometry, and is connected with L ligands to form a 3D fishing net structure, which is a novel (3,6) network topology. The luminescence of the complex has been investigated, and the result reveals that it displays luminescent property in the voilet region.
基金supported by the National Natural Science Foundation of China(No.21273101 and 21302082)the Program for Science&Technology Innovation Talents in Universities of Henan Province(2014HASTIT014,14IRTSTHN008 and 164100510012)the Tackle Key Problem of Science and Technology Project of Henan Province(No.142102310483)
文摘A novel 3D hetero-nuclear framework,namely [K_2Cd_5(Hbptc)_4(H_2O)_(12)·12H_2O]_n(1,H4 bptc = biphenyl-2,3,3?,5?-tetracarboxylic acid),was obtained by hydrothermal reaction. X-ray singlecrystal structure analysis reveals that polymer 1 crystallizes in orthorhombic,space group Pbcn with a = 26.6152(13),b = 11.7449(5),c = 29.5923(14) ?,V = 9250.3(7) ?~3,C_(64)H_(76)Cd_5K_2O_(56),Mr = 2381.44,Dc = 1.710 g/cm^3,μ(MoK α) = 1.323 mm^(-1),F(000) = 4744,Z = 4,the final R = 0.0668 and wR = 0.1135 for 10613 observed reflections(I > 2σ(I)). Polymer 1 displays a 3D network that is built on the unprecedented heterobimetallic [Cd_3Cd_2K] molecular building block with a(3,4)-connected(6·8·8)2(6·6·82·82·126·126) topology which represents a rare 2-fold interpenetrating 3D framework topology network. The luminescence analyses reveal that polymer 1 shows obvious emission at room temperature in the solid state. In addition,it was also characterized by elemental,IR spectra and TG analyses.
基金supported by the Postdoctoral Science Foundation of Central South University
文摘A new hexanuclear silver(I) compound containing thiosemicarbazone with group of 3-pyridine was synthesized and structurally characterized by single-crystal X-ray diffraction,elemental analysis and fluorescence spectrum.The title compound 3 crystallizes in monoclinic,space group C2/m with a = 18.6523(9),b = 24.7519(11),c = 22.4542(15) ,β = 93.4960(10)°,V = 10347.4(10)3,C68H104Ag6N30O8S6,Mr = 2309.39,Dc = 1.482g/cm3,μ(MoKα) = 1.293 mm-1,F(000) = 4656,Z = 4,the final R = 0.0544 and wR = 0.1580 for 6733 observed reflections(I > 2σ(I)).In the structure,two Ag6L36(L3 = pyridine-3-carboxaldehyde thiosemicarbazone) clusters are contained.In each cluster,the S atom of ligand L3 served as a triply bridged chelator to connect the six silver atoms into a Ag6L36 cluster.Luminescence investigation revealed that the band at 630 nm was attributed to cluster-centered(CC) electron transfer,and those at 493 and 530 nm to the LMCT and CC transitions,respectively.
基金supported by the Postdoctoral Science Foundation of Central South University
文摘A new hexanuclear silver (I) compound 2 containing thiosemicarbazone with the group of benzene was synthesized and structurally characterized by single-crystal X-ray diffraction, elemental analysis and fluorescence spectrum. The title compound crystallizes in triclinic, space group P with a = 11.611(3), b = 15.610(5), c = 15.624(7) , α = 113.942(6), β = 104.520(6), γ = 104.230(4)°, V = 2304.1(14) 3, C60H77Ag6N22O4.5S6, Mr = 2018.02, Dc = 1.454 g/cm3, μ(MoKα) = 1.435 mm-1, F(000) = 1005, Z = 1, the final R = 0.0468 and wR = 0.1474 for 6608 observed reflections (I > 2σ(I)). In the structure, the S atom of the ligand L2 (L2 = benzaldehyde thiosemicarbazone) served as a triply bridged chelator to connect the six silver atoms into a Ag6L26 cluster. The luminescence property of compound 2 was investigated at room temperature.
基金supported by the Postdoctoral Science Foundation of Central South University
文摘A new hexanuclear silver(I) compound containing thiosemicarbazones with groups of 1-naphthalene was synthesized and structurally characterized by single-crystal X-ray diffraction,elemental analysis and fluorescence spectrum.The title compound crystallizes in monoclinic,space group P2 1 /c with a=16.101(4),b=24.855(7),c=14.492(4),β=109.730(5)°,V=5459(3)3,C 90 H 102 Ag 6 N 24 O 6 S 6,M r=2455.54,D c=1.494 g/cm 3,μ(MoKα)=1.228 mm-1,F(000)=2472,Z=2,the final R=0.0761 and wR=0.1507 for 5258 observed reflections (I > 2σ(I)).In the structure,the S atom of ligand L serves as a triply bridged chelator to connect the six silver atoms into a Ag 6 L 6 cluster.Luminescence investigation reveals that the compound exhibits two ligand-independent cluster-centered electron transfer bands and one ligand-dependent charge transfer band.
基金Project supported by the Doctoral Research Fund of Liaoning Province,China(Grant No.201601351)the National Natural Science Foundation of China(Grant No.51502142)the General Program of Natural Science Foundation of the Jiangsu Provincial Higher Education Institutions,China(Grant No.15KJB430021)
文摘To explore suitable single-phase white emission phosphors for warm white light emitting diodes, a series of novel phosphors Na_3MgZr(PO_4)_3:xDy^(3+)(0 ≤ x ≤ 0.03) is prepared, and their phase purities as well as photoluminescence properties are discussed in depth via x-ray diffraction structure refinement and photoluminescence spectrum measurement.The electronic structure properties of the Na_3MgZr(PO_4)_3host are calculated. The results reveal that Na_3MgZr(PO_4)_3 possesses a direct band gap with a band gap value of 4.917 e V. The obtained Na_3MgZr(PO_4)_3:Dy^(3+) phosphors are all well crystallized in trigonal structure with space group Rc, which has strong absorption around 365 nm and can generate warm white light emissions peaking at 487, 576, and 673 nm upon ultraviolet excitation, which are attributed to the transitions from ~4F_(9/2) to ~6H_(15/2),~6H_(13/2), and ~6H_(11/2) of Dy^(3+) ions, respectively. The optimal doping content, critical distance, decay time, and Commission International de L'Eclairage(CIE) chromaticity coordinates are investigated in Dy^(3+) ion-doped Na_3MgZr(PO_4)_3. The thermal quenching analysis shows that Na_3MgZr(PO_4)_3:Dy^(3+) has a good thermal stability, and the thermal activation energy is calculated. The performances of Na_3MgZr(PO_4)_3:Dy^(3+) make it a potential single-phase white emission phosphor for warm white light emitting diode.
基金Supported by the National Natural Science Foundation of China(No.20901066)the Natural Science Foundation of Yunnan Province(No.2012FB122)+3 种基金the Education Science Foundation of Yunnan Province(No.2013Z050)the Science Foundation of State Key Laboratory of Structural Chemistry(No.20140012)Training Program for Young Academic and Technical Leader in Yunnan Provincethe Science Foundation of Key Laboratory of Micro-and Nano-materials and Technology in Yunnan Province(No.ZZ2016002)
文摘The potassium terbium polyphosphate crystal KTb(PO_3)_4 has been synthesized using a high temperature solution reaction method. The structure and composition were characterized by single-crystal X-ray diffraction, powder X-ray diffraction and elemental analysis. The compound crystallizes in the monoclinic space group P21/n with a=10.3182(6), b=8.9129(5), c=10.7940(6) ?, β=105.993(1)o, V=954.3 ?~3, Z=4, Mr=513.91, Dc=3.577 g/cm^3, μ=8.585 mm^(-1), F(000)=960, S=0.955,(Δρ)max=1.380,(Δρ)min=–3.428 e/?~3, the final R=0.0301 and w R=0.0400 for 2301 observed reflections with I > 2σ(I). In addition, pure powder of isostructural Rb Tb(PO_3)_4 was synthesized in order to investigate the optical property. Photoluminescence measurements show that both crystals ATb(PO_3)_4(A=K(1), Rb(2)) are promising candidates to become solid-state visible green light-emitting sources.
基金Supported by Jiangsu Key Laboratory for Chemistry of Low-dimensional Materials(JSKC10083)
文摘A novel 2D Mn(Ⅱ) coordination polymer [Mn(CH3COO)2(INH)]n(INH=isoniazid) has been synthesized in DMF solution with isoniazid and Mn(CH3COO)2 . The polymer was characterized by single-crystal X-ray diffraction analysis, FTIR and X-ray powder diffraction (XRPD). The crystal belongs to the monoclinic system, space group P2 1 /c with a=9.3251(18), b=16.340(3), c=8.8096(17) , β=94.747(3)°, V=1337.7(4) 3 , Z=4, μ(MoKα)=1.006 mm -1 , F(000)=636, R=0.0754 and wR=0.1375 (I > 2σ(I)). In the complex, each Mn(Ⅱ) atom is coordinated to three CH3COO- groups and two INH ligands. The Mn(Ⅱ) atoms locate in a distorted coordination octahedron and are bridged by CH3COO- ions to form a 1D S shaped chain extending along the c direction. The INH molecules act as bridges to link the Mn(Ⅱ) atoms of adjacent chains and further construct a lamellar polymer. The remaining coordination site is occupied by an O atom of the other CH3COO-. The experimental results show that the title complex has good luminescence property and could be used as potential optical materials.
基金Funded by the National Natural Science Foundation of China (No.50672087 and No.60778039)National Basic Research Program of China (No.2006CB806000)+1 种基金National High Technology Program of China (No.2006AA03Z304)supported by Program for Changjiang Scholars and Innovative Research Team in University
文摘We report on a simple and novel method to induce Si-related oxygen-deficient defects in CaO-Al_2O_3-SiO_2 glasses by using Al metal instead of part Al_2O_3.Blue emission is observed from the glass samples.Moreover,the quantities of the oxygen-deficient defects can be controlled by adjusting Al content. We also prepare glass samples using Al instead of part Al_2O_3 and doped with Eu^(3+) ions.Addition of Al results in reduction of Eu^(3+) ions to Eu^(2+) ions and change of the luminescence property.The investigation made on to control and characterize the defects could lead to the development of more efficient economical materials with improved properties.
基金supported by the National Natural Science Foundation of China (10644002)Beijing Municipal Science & Technology Commission Foundation (Y0406001040711)the Foundation of Beijing Jiaotong University (2006XM051)
文摘A series of Eu2+-doped fluorochlorozirconate glass-ceramics were prepared by solid state reaction method. X-ray diffraction, pho-toluminescence, photo-stimulated luminescence (PSL) and the turbidity of fluorozirconate glass containing BaCl2 nano- and micro-crystals were measured for the samples annealed at 290 °C for 10 min. The PSL was attributed to the characteristic emission of Eu2+ in nano-crystallites of BaCl2, which formed in the glass upon annealing. The PSL efficiency of the glass ceramic was increased by increasing the concentration of BaCl2, which, however, resulted in the decreasing in the transparency of the sample. The sample turned to a semi-transparent glass ceramic or even an opaque and milky white one from a near-transparent glass. The trade-off between optical trans-parency and PSL intensity over different concentrations of BaCl2 for X-ray imaging plate applications was briefly discussed.
基金supported by the Natural Science Foundation of Colleges of Anhui Province(KJ2017ZD29)National Undergraduates Innovation Project(201510371010)
文摘A new complex [Cd_2(L)_2(Cl)_2(H_2O)]_n(1) was synthesized by reacting CdCl_2·2.5 H_2O with 4-(1,2,4-triazol-4-yl)phenylacetic acid(HL) ligand.The structure of the complex was characterized by single-crystal X-ray diffraction,IR spectroscopy,elemental analysis and PXRD.Complex 1 crystallizes in triclinic,space group P21/c with a = 11.4303(8),b = 14.1792(10),c = 14.6857(10) ?,β = 96.3780(10)o,V = 2365.4(3) ?~3,Z = 4,C_(20)H_(16)Cl_2N_6O_5Cd_2,M_r = 716.09,D_c = 2.011 g/cm3,μ = 2.069 mm^(-1),S = 1.051,F(000) = 1392,the final R = 0.0458 and wR = 0.0949 for 5402 observed reflections(I > 2σ(I)).Complex 1 is a two-dimensional(2D) layer structure and non-covalent bonding interactions such as C–H···π and π···π extend the 2D to form a three-dimensional supramolecular polymer.
基金This work was support by National Basic Research Program of China (No: 2004CB720605) and the Natural Science Foundation of China (No. 20173064 and 90203017).
文摘The silver-dppm complex, [Ag2(dppm)2(NMP)2](SbF6)2?4H2O?3CH2Cl2 1 (NMP = 2- (4-dimethylaminophenyl)imidazo(4,5-f)(1,10)phenanthroline, dppm = diphenylphosphinomethane), was synthesized and its structure was determined by X-ray diffraction. The crystal belongs to mono- clinic, space group C2/c, Mr = 2461.61, a = 21.57(10), b = 22.48(6), c = 22.53(6) ?, β = 101.29(2)o, V = 10713(64) ?3, Z = 4, Dc = 1.526 g/cm3, μ = 1.141 mm?1, F(000) = 4920, R = 0.0664 and wR = 0.1774 for 8524 observed reflections (I > 2σ(I)). Complex 1 exists as a centrosymmetric dimmer. The two dppm molecules bridge two AgNMP moieties to form an eight-membered Ag2P4C2 metal- lacyclic ring with ligand NMP chelating to each Ag. It appears photoluminescence (λmax = 625 nm) at room temperature and makes red shift compared with free ligand NMP (λmax = 522 nm). DFT calculation indicates that the emission of 1 originates from singlet metal-perturbed ILCT excited state.
文摘A new metal-organic coordination polymer {[Nd(tci)(H_2O)_2]·2H_2O}n(1) has been synthesized based on the flexible tricarboxylate ligand tris(2-carboxyethyl)isocyanuric acid(H3tci) and structurally characterized by single-crystal X-ray diffraction analyses, elemental analysis, infrared spectra(IR), powder X-ray diffraction(PXRD) and thermogravimetric analysis(TGA). Complex 1 crystallizes in triclinic, space group P1 with a = 9.1648(11), b = 9.3326(12), c = 12.440(2) ?, C_(12)H_(20)N_3O_(13) Nd, Mr = 558.55, V = 886.9(2) ?3, Z = 2, Dc = 2.092 g·cm-3, μ = 3.006 mm-1, F(000) = 554, 2.56<θ<25.00°, λ(Mo Kα) = 0.71073 ?, T = 293(2) K, the final R = 0.0662 and w R = 0.2071. X-ray diffraction analysis reveals that complex 1 is a two-dimensional layer, which is further assembled into a three-dimensional supramolecular architecture through hydrogen bonding interactions. The structure of complex 1 can be simplified as a rare 2-periodic uninodal {48·62} topology and a non-interpenetrating kgd topology. Furthermore, the thermal stability and photoluminescence property of 1 were investigated.
基金supported by the Shanghai Leading Academic Discipline Project B 108 and Science & Technology Commission of Shanghai Municipality (08DZ2270500)
文摘A new coordination polymer [Ni(3-bpo)(m-bdc)(C2H5OH) 2]n(1,3-bpo = 2,5-bis(3-pyridyl) -1,3,4-oxadiazole,m-H2bdc = 1,3-benzenedicarboxylic acid) was solvothermally synthesi-zed and characterized by IR,TGA and single-crystal X-ray diffraction. The title complex crystalli-zes in the orthorhombic system,space group Pnma with a = 7.786(3) ,b = 17.253(6) ,c = 18.478(6) ,V = 2481.9(14) 3,Mr = 539.18,Dc = 1.443 g/cm3,Z = 4,R = 0.0353 and wR = 0.0589. The m-bdc and 3-bpo bridge two Ni(Ⅱ) ions through two carboxylate groups and two pyridyl groups forming a 1D infinite double-sinusoidal chain along the c axis. The photoluminescence of 1 shows a large red shift compared to that of free ligands in the solid state.
文摘The effect of Y and Sb co-doping on the luminescence property of PbWO 4 crystals has been investigated. Compared with undoped PbWO4, the transmittance and emission peak intensity of Y∶Sb∶PbWO 4 crystals were obviously improved. In addition, its transmittance cutoff wavelength and emission peak shifted to the shorter one. The mechanism of effect of Y and Sb on the transmittance spectra was briefly discussed. The light yield of Y∶Sb∶PbWO 4 crystals was 25p.e./MeV, which was two times of that of undoped PbWO 4. Our experiments showed that Y and Sb co-doping was a selectable method to improve the luminescence property of PbWO 4.
基金supported by the National Natural Science Foundation of China (No. 21271098, 21071074 and 20871042)Specialized Research Fund for the Doctoral Program of Higher Education of China (No. 20104104110004)Natural Science Foundation of the Education Department of Henan Province (No 2011A150019 and 2008B430012)
文摘A new cadmium(Ⅱ) polymer based on imidazole derivative, formulated as [Cd(Hiba)2]n1, H2iba=4-(1-H-imidazol-2-yl) benzoic acid), has been synthesized under hydrothermal conditions. The compound crystallizes in triclinic system, space group Pī with a=7.062(4), b=10.840(7), c=13.099(8), α=98.102(7), β=101.524(7), γ=107.961(7)°, V=912.3(10)3 , Z=2, Mr=486.75, Dc=1.772 Mg/m3 , μ=1.234 mm-1 , F(000)=484, the final R=0.0735 and wR=0.1739 for 2154 observed reflections with I>2σ(I). Polymer 1 consists of (Cd-Hiba)2 zigzag chains, which are further linked by hydrogen bonding to extend into a two-dimensional (2D) corrugated-shape sheet structure. The 2D structures are further connected into a 3D supramolecular edifice through hydrogen bonding. The polymer exhibits exceptional high thermal stability. The bulk purity of the materials of 1 was confirmed through the powder X-ray diffraction (PXRD) patterns. The luminescent property of polymer 1 has also been investigated.
