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固体推进剂用新型Schiff碱类高效键合剂的合成及性能表征
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作者 武卓 赵志坤 +3 位作者 徐爽 李洪旭 杨玉林 庞爱民 《火炸药学报》 EI CAS CSCD 北大核心 2024年第7期649-655,I0004,共8页
为提高丁羟四组元推进剂和CL-20/GAP推进剂的力学性能,解决新的推进剂填料基体界面“脱湿”问题,设计合成了新型Schiff碱键合剂;采用傅里叶红外光谱仪、扫描电子显微镜及万能材料拉伸机等对键合剂的键合效果和推进剂的力学性能进行了表... 为提高丁羟四组元推进剂和CL-20/GAP推进剂的力学性能,解决新的推进剂填料基体界面“脱湿”问题,设计合成了新型Schiff碱键合剂;采用傅里叶红外光谱仪、扫描电子显微镜及万能材料拉伸机等对键合剂的键合效果和推进剂的力学性能进行了表征。结果表明,合成的新型Schiff碱键合剂包含键合剂必备官能团且在AP表面存在明显键合,新型Schiff碱键合剂有望取代有毒MAPO,可明显提高丁羟四组元推进剂的力学性能,使丁羟四组元推进剂常温拉伸强度达到0.7 MPa,常温延伸率大于55%,高温延伸率大于50%,低温延伸率大于60%,并可以明显改善丁羟四组元推进剂的工艺性能;在CL-20/GAP推进剂中,新型Schiff碱键合剂可同时提高推进剂的拉伸强度和延伸率。 展开更多
关键词 材料力学 丁羟推进剂 键合剂 力学性能 schiff 界面脱湿 MAPO
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Theoretical Study on the Structures, Vibrational Spectra, and the Nature of the Intermediate Hydrogen Bond of Schiff Bases
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作者 Yong ZHANG Cun Yuan ZHAO Xiao Zeng YOU(Coordination Chemistry Institute, Nanjing University, Nanjing 210093) 《Chinese Chemical Letters》 SCIE CAS CSCD 1997年第4期323-326,共4页
Semi-empirical method PM3 was used to study the geometry and vibrational spectrum of N-(2-hydroxy-l-naphthyl-methylene)-l-pyrenamine (NPY) with the intermediate hydrogen bond. Results are comparable to experimentation... Semi-empirical method PM3 was used to study the geometry and vibrational spectrum of N-(2-hydroxy-l-naphthyl-methylene)-l-pyrenamine (NPY) with the intermediate hydrogen bond. Results are comparable to experimentations. Based on results of both NPY and its model, N-(2-hydroxy-l-naphthyl-methylene)aniline, it was found that the N-(2-hydroxy-l-naphthyl-methylene) group is principally responsible for the special hydrogen bonding through conjugation effect. 展开更多
关键词 NATURE and the Nature of the Intermediate Hydrogen bond of schiff bases Vibrational Spectra Theoretical Study on the Structures
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Synthesis, Characterization and Crystal Structure of a New Schiff Base Ligand from a Bis(Thiazoline) Template and Hydrolytic Cleavage of the Imine Bond Induced by a Co(II) Cation
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作者 Jafar Attar Gharamaleki Fahimeh Akbari +2 位作者 Akram Karbalaei Kamran B. Ghiassi Marilyn M. Olmstead 《Open Journal of Inorganic Chemistry》 2016年第1期76-88,共13页
The reaction of bis-[2-amino-4-pheny1-5-thiazolyl] disulfide with 5-nitro-salicylaldehyde in absolute ethanol resulted in the formation of a new Schiff base ligand H<sub>2</sub>L (1). Characterization of t... The reaction of bis-[2-amino-4-pheny1-5-thiazolyl] disulfide with 5-nitro-salicylaldehyde in absolute ethanol resulted in the formation of a new Schiff base ligand H<sub>2</sub>L (1). Characterization of the ligand was performed by FT-IR, <sup>1</sup>H NMR, <sup>13</sup>C NMR, UV-Vis, elemental analysis and single crystal X-ray diffraction. The ligand, (1), possesses a disulfide –S–S– bridge of 2.1121 (3) ? length, and the molecule adopts a cis-conformation around this bond. In the crystal structure of (1), an intramolecular O–H···N hydrogen bond with D… A distance of 2.69 (3) ? was present. The reaction of (1) with Co(NO<sub>3</sub>)<sub>2</sub>·6H<sub>2</sub>O and CuCl<sub>2</sub>·2H<sub>2</sub>O in methanol afforded the corresponding metal complexes. The obtained solids were further investigated by elemental analysis and UV-Vis titration that confirmed the formation of [CoL] and [ClCuHL] complexes. However, recrystallizaion of the Co(II) complex in dimethylsulfoxide caused the complete hydrolysis of the imine bond and afforded a Co(II) complex in which two 5-nitro-salicylaldehyde and two DMSO molecules were coordinated to the central metal in an octahedral fashion. This structure (2) was also confirmed by single crystal X-ray analysis. 展开更多
关键词 schiff base Thiazoline Ligand Disulfide bond Co(II) and Cu(II) Complexes Hydrolytic Cleavage Solution Study
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Synthesis and Crystal Structure of a New Three-dimensional Supramolecule of Copper(Ⅱ) Schiff Base Complex 被引量:3
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作者 LI Chun-Hong WANG Qiang +1 位作者 XU Yan-Qing HU Chang-Wen 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2008年第2期187-190,共4页
A new three-dimensional supramolecule composed of copper-Schiff base complex, [Cu(naphdien)]Cl·H2O, where naphdien is Schiff base of 2-hydroxy-1-naphthaldehyde and diethylenetriamine, has been synthesized and d... A new three-dimensional supramolecule composed of copper-Schiff base complex, [Cu(naphdien)]Cl·H2O, where naphdien is Schiff base of 2-hydroxy-1-naphthaldehyde and diethylenetriamine, has been synthesized and determined by single-crystal X-ray diffraction. It belongs to the monoclinic system, space group P21/c, with a = 7.3490(15), b = 7.0847(16), c = 30.845(3)A, β= 95.33(3)°, V = 1599.0(5)A3, Z = 4, C15 H20ClCuN3O2, Mr = 373.33, De = 1.551 g/cm3, μ = 1.543 mm^-1, F(000) = 772, R = 0.0536 and wR = 0.0927 for 2788 unique reflections with 1659 observed ones (I 〉2σ(I)). In the crystal structure, mononuclear units [Cu(naphdien)]Cl·H2O are linked into a two-dimensional framework via strong hydrogen bonds, and extended into a three-dimensional supramolecular structure through π-π stacking interactions. 展开更多
关键词 COPPER crystal structure schiff base hydrogen bonds
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A Novel Potassium Complex Based on the Taurine-salicylaldehyde Schiff Base:Synthesis,Crystal Structure and Spectroscopy 被引量:1
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作者 冯勋 赵建社 +2 位作者 王利亚 师新阁 孙倩 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2010年第5期706-711,共6页
A novel two-dimensional self-assembly network formulated as [K(TSSB)]n (TSSB= taurine-salicylaldehyde Schiff base) has been synthesized via the reaction of salicylaldehyde with taurine at the presence of potassium... A novel two-dimensional self-assembly network formulated as [K(TSSB)]n (TSSB= taurine-salicylaldehyde Schiff base) has been synthesized via the reaction of salicylaldehyde with taurine at the presence of potassium hydroxide in water-methanol solution,and was structurally characterized by elemental analysis,IR,UV-VIS spectra and X-ray diffraction.It crystallizes in the monoclinic system,space group P21/c with a=20.245(3),b=7.2905(9),c=7.5458(10),β= 94.1920(10)o,V=1110.8(2)3,Mr=267.34,Z=4,Dc=1.599 g/cm3,μ(MoKα)=0.663 mm-1 and F(000)=552.The units of K[TSSB] are linked into a one-dimensional double chain structure via the sulfonic groups from the taurine-salicylaldelyde Schiff base,and such chains are further extended through O-K-O bond interactions resulting in a two-dimensional supramolecular architecture.In the complex,the K(I) ion displays a slightly distorted dodecahedral geometry with an eight-coordination number. 展开更多
关键词 crystal structure potassium(I) complex taurine-salicylaldehyde schiff base hydrogen bond interactions
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Synthesis and Crystal Structure of a Novel Binuclear Cu(Ⅱ) Complex with Tetradentate Schiff-base Ligand 被引量:3
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作者 ZHAO Hai-Yan QIU Xiao-Hang +1 位作者 TONG Xiao-Lan SHEN Pan-Wen 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2006年第9期1095-1099,共5页
A novel binuclear complex ([Cu^2(μ2-shed)(hshed)].(CIO4),H2O, h2shed = N-salicylidene-N'-(2-hydroxyethyl)ethylenediamine) has been synthesized and structurally characterized by X-ray diffraction analysis. ... A novel binuclear complex ([Cu^2(μ2-shed)(hshed)].(CIO4),H2O, h2shed = N-salicylidene-N'-(2-hydroxyethyl)ethylenediamine) has been synthesized and structurally characterized by X-ray diffraction analysis. It crystallizes in monoclinic, space group P21/c with a = 12.511(10), b = 15.750(12), c = 14.281 (12) A, β = 100.564(14)°, C22H31CIN4O9Cu2, Mr = 658.04, V = 2766(4) A^3, Z = 4, Dc = 1.580 g/cm^3,μ(MoKα = 1.689 mm^-1, F(000) = 1352, the final R = 0.0528 and wR = 0.1433 for 4880 independent reflections with Rint = 0.0577. The complex is a binuclear copper compound, and two Cu(Ⅱ) ions in the binuclear cation are in different coordination environments. The Cu(1) ion adopts a distorted square pyramidal geometry (x = 0.22) with four donor atoms (N2O2) of the ligand in the basal plane, and one hydroxyl oxygen atom with protonated form occupying the apical position. The Cu(2) ion assumes the geometry of a distorted square plane with four donor atoms (N2O2) of the ligand. The Cu...Cu separation is 3.103 A,. In addition, N-H…O and C-H…O intermolecular hydrogen bonding interactions link these binuclear cations into a quasi one-dimensional chain along the a axis. 展开更多
关键词 schiff base copper (Ⅱ) complex crystal structure hydrogen bonds
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Crystal Structures and Magnetic Properties of Two New Schiff Base Complexes
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作者 GuangXiangLIU XiaoMingREN HengXU ChuanYiTANG GenHuaWU YouCunCHEN 《Chinese Chemical Letters》 SCIE CAS CSCD 2004年第9期1105-1108,共4页
Two new Schiff base complexes, [NiL]ClO4 1 and [CuL]ClO40.5H2O 2, were synthesized and characterized, where L is the 1:1 condensation product of salicylaldehyde and diethylenetriamine. Their crystal structures and ma... Two new Schiff base complexes, [NiL]ClO4 1 and [CuL]ClO40.5H2O 2, were synthesized and characterized, where L is the 1:1 condensation product of salicylaldehyde and diethylenetriamine. Their crystal structures and magnetic properties were determined and investigated. The H-bonding interactions concern just in neighbor cation and anion, do not extend into network for both 1 and 2. The temperature dependence of the magnetic susceptibilities (2-300K) showed that 1 is diamagnetism and 2 is paramagnetism with weak antiferromagnetic exchange interactions between adjacent spin carriers, no magnetic ordering taking place in these two complexes. 展开更多
关键词 schiff base complex crystal structure H-bonding interaction magnetic property.
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Pyridine-contained α-Cyanostilbenzene Schiff Base:Preparation, Crystal Structure and Photoluminescence
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作者 潘剑婷 丁爱祥 +2 位作者 杨家祥 黄建炎 孔林 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2015年第2期215-220,共6页
A novel pyridine-contained a-cyanostilbenzene Schiff base, (Z)-3-(4-butoxy- phenyl)-2-(4-((E)-pyridin-2-yl-methyleneamino)phenyl)acrylonitrile (L), has been synthesized and characterized by 1H NMR, 13C NMR... A novel pyridine-contained a-cyanostilbenzene Schiff base, (Z)-3-(4-butoxy- phenyl)-2-(4-((E)-pyridin-2-yl-methyleneamino)phenyl)acrylonitrile (L), has been synthesized and characterized by 1H NMR, 13C NMR, FT-IR spectra and single-crystal X-ray diffraction. Single-crystal data show that compound L belongs to the triclinic system, space group P1, with a = 8.759(4), b = 10.779(4), c = 12.594(5) A, a= 65.873(4), β = 88.332(5), 7= 73.800(5)°, M,. = 381.46, V= 1037.2(7) A3, Z = 2, Dc = 1.221 g/cm-3,μ = 0.076 mm-1, F(000) = 404, gint = 0.0311, R (I〉 20(I)) = 0.0484, wR (I 〉 20(I)) = 0.1544, R (all data) = 0.0484, wR (all data) = 0.1692, completeness to theta = 25.000 being 99.0% and GOF = 1.179. There are two kinds of intermolecular hydrogen bonds and one kind of C-H……π weak interaction between adjacent molecules. Compound L can be used as a candidate for desirable devices with high performance due to its good thermal stability and excellent optical performance. 展开更多
关键词 pyridine schiff base single-crystal intermolecular H-bond optical perI-ormance
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Two Cobalt(II) Complexes Derived from the Hydrolysis Product of Di-Schiff Base Ligand N,N'-Bis-(1-benzimidazo-2-yl-ethylidene)-ethane-1,2-diamine:Preparation,Characterization and Crystal Structure of the 6-Coordinate Species [CoL_2]X·H_2O (X = ClO_4^-, N 被引量:1
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作者 夏昌坤 吴小园 +2 位作者 吴鼎铭 蒋晓瑜 卢灿忠 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2008年第7期805-811,共7页
The reactions of Co(C1O4)2·6H2O and Co(NO3)2.6H2O with the di-Schiff base ligand N,N'-bis-(1-benzimidazo-2-yl-ethylidene)-ethane-1,2-diamine (LA) in ethanol have been investigated. The reactions of LA wi... The reactions of Co(C1O4)2·6H2O and Co(NO3)2.6H2O with the di-Schiff base ligand N,N'-bis-(1-benzimidazo-2-yl-ethylidene)-ethane-1,2-diamine (LA) in ethanol have been investigated. The reactions of LA with excess amount of cobalt salts yield the six-coordinate complexes [CoL2](ClO4)E·H2O 1 and [CoL2](NO3)E·H2O 2 as isolatable products (L= N-(1- benzimidazo-2-yl-ethylidene)-ethane-1,2-diamine), where L is a tri-dentate mono-Schiff base ligand, resulting from the hydrolysis of the precursor di-Schiff base LA. Both complexes were characterized by X-ray crystallography. Crystal data for complex 1: monoclinic, space group P21/c, a = 11.9214(10), b = 23.5828(17), c = 14.0387(12)A, β = 135.219(4)°, C22H30Cl2CoN8O9, Mr = 680.37, V = 2780.1(4) A^3 ,Z = 4, Dc = 1.625 g/cm^3,μ(MoKa) = 0.876 mm^-1, F(000) = 1404, the final R = 0.0725 and wR = 0.1530 for 5726 observed reflections (I 〉 2σ(I)). Crystal data for complex 2: monoclinic, space group P21/c, a = 18.2162(16), b = 10.0610(6), c = 18.593(2)A, β = 130.099(3)°, C22H30CoN10O7, Mr = 605.49, V = 2606.5(4) A3 Z = 4, Dc = 1.543 g/cm^3,μ(MoKa) = 0.722 mm^-1, F(000) = 1260, the final R = 0.0619 and wR = 0.1429 for 5194 observed reflections (I 〉 2σ(I)). X-ray diffraction analysis reveals that each cobalt atom in the two complexes is chelated by six nitrogen atoms from two tridentate iigands L, exhibiting a slightly distorted octahedral coordination sphere. In both complexes, the strong hydrogen-bonding interactions between the lattice waters and N-H groups of the ligands result in 1D chains which are further connected by ClO4^- (or NO3^-) groups to form a 3D framework. In complex 2, the strong π-π interactions increase the stability of the structure. 展开更多
关键词 2-acetylbenzimidazole di-schiff base ligand crystal structure hydrolysis hydrogen-bonding interactions coordination complex N N -bis-(1-benzimidazo-2-yl-ethylidene)-ethane- 1 2-diamine N-(1-benzimidazo-2-yl-ethylidene)-ethane- 1 2-diamine
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动态席夫碱交联的壳聚糖基水凝胶的合成与性能研究
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作者 郑洁 黄文灿 +2 位作者 王文洁 应锐 张海洋 《中国海洋大学学报(自然科学版)》 CAS CSCD 北大核心 2024年第6期77-87,共11页
壳聚糖基水凝胶机械性能往往较差,为提高其机械性能通常进行戊二醛交联,但是戊二醛会对水凝胶的生物安全性造成影响。为在提高壳聚糖基水凝胶的机械性能时充分保障其生物安全性,本研究制备了一款完全基于壳聚糖及其衍生物的水凝胶。羧... 壳聚糖基水凝胶机械性能往往较差,为提高其机械性能通常进行戊二醛交联,但是戊二醛会对水凝胶的生物安全性造成影响。为在提高壳聚糖基水凝胶的机械性能时充分保障其生物安全性,本研究制备了一款完全基于壳聚糖及其衍生物的水凝胶。羧甲基壳聚糖(CMC)与双醛壳聚糖(DACS)通过席夫碱键共价交联,形成壳聚糖基水凝胶(CBH),通过流变学实验、拉伸实验、黏附实验对CBH的自愈合性能、机械性能进行评价。通过抗菌实验、活/死细胞实验、细胞毒性、溶血实验、抗炎实验对CBH的抗菌性能、生物相容性以及抗炎性能进行了全面评估。研究发现,CBH可拉伸至原长的2倍,在4 h后的愈合效率可达72%,这证明席夫碱键交联赋予了CBH良好的自愈合性能并提高了其机械性能。CBH的平衡溶胀率可达4 500%,且具有pH响应性。CBH对大肠杆菌(Escherichia coli)和金黄色葡萄球菌(Staphylococcus aureus)的抑制效率分别为80.95%和79.79%。与CBH共用培养的细胞可随时间正常增殖,无明显细胞死亡,且溶血率仅为3%,这证明CBH具有优异的生物相容性。同时,CBH还可以抑制一氧化氮和TNF-α、IL-1β、IL-6等促炎因子的分泌,增加IL-10等抗炎因子的分泌,具有良好的抗炎活性。研究结果表明,利用CMC和DACS制备的CBH,具有良好的自愈合性能、机械性能、抗菌、抗炎性能以及高度生物相容性,其在生物医学领域有广阔的应用潜力。 展开更多
关键词 壳聚糖 水凝胶 席夫碱键 自愈合 机械性能
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辅酶B_(12)模型化合物的研究(Ⅲ)——一类新型烷基钴Schiff碱配合物的合成及Co—C键稳定性 被引量:4
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作者 陈慧兰 陈冠菁 +1 位作者 缪炳文 唐雯霞 《高等学校化学学报》 SCIE EI CAS CSCD 北大核心 1991年第4期431-435,共5页
合成与表征了一系列烷基钻Schiff碱配合物RCo(SB)L(R为甲,乙,丙,正丁和异丁基;L为水;SB为双水杨醛缩二甲基丁二胺),它们是一类尚未见报道的新的辅酶B_(12)模型化合物。该配合物的溶液很不稳定,加热或光照促使Co—C键断裂,轴向烷基和平... 合成与表征了一系列烷基钻Schiff碱配合物RCo(SB)L(R为甲,乙,丙,正丁和异丁基;L为水;SB为双水杨醛缩二甲基丁二胺),它们是一类尚未见报道的新的辅酶B_(12)模型化合物。该配合物的溶液很不稳定,加热或光照促使Co—C键断裂,轴向烷基和平伏面配体对Co—C键稳定性均有影响。经紫外、可见分光光度法及自旋捕集ESR法确定了热分解和光分解反应的产物和超精细分裂常数。 展开更多
关键词 辅酶B12 模型化合物 西佛碱
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Al_2O_3催化下的取代β-羟基胺Schiff碱衍生物的C—C键裂解反应
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作者 陶京朝 杨义科 +1 位作者 弓建红 石伟民 《郑州大学学报(理学版)》 CAS 2006年第3期74-78,共5页
探讨了中性Al2O3催化下的取代β-羟基胺Schiff碱衍生物的C—C键裂解反应,结果表明,在Al2O3存在下,由取代苯甲醛与1,2-二苯基-2-氨基乙醇形成的亚胺类化合物很容易通过逆ene反应过程发生α,β-C—C键断裂,且反应不受芳醛分子中邻位基团... 探讨了中性Al2O3催化下的取代β-羟基胺Schiff碱衍生物的C—C键裂解反应,结果表明,在Al2O3存在下,由取代苯甲醛与1,2-二苯基-2-氨基乙醇形成的亚胺类化合物很容易通过逆ene反应过程发生α,β-C—C键断裂,且反应不受芳醛分子中邻位基团的影响.通过跟踪反应进程,提出了可能的反应机理. 展开更多
关键词 AL2O3 催化 Β-氨基醇 schiff C—C键裂解
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一个锰(Ⅲ)Schiff碱配合物[Mn(napn)(CH_3OH)_2]ClO_4的合成与晶体结构
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作者 周北川 寇会忠 +3 位作者 高东昭 廖代正 王如骥 李亚栋 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2002年第5期549-552,共4页
合成了一个新配合物[Mn(napn)(CH3OH)2]ClO4 (C26H26 Cl N2O8Mn,Mr = 584.88,H2napn = 双a-萘酚醛缩乙二胺),并测定了其晶体结构。晶体属于三斜晶系,空间群P ,a = 7.813(1),b = 13.025(2),c = 14.089(2) ? = 64.89(3), = 83.98(3), = ... 合成了一个新配合物[Mn(napn)(CH3OH)2]ClO4 (C26H26 Cl N2O8Mn,Mr = 584.88,H2napn = 双a-萘酚醛缩乙二胺),并测定了其晶体结构。晶体属于三斜晶系,空间群P ,a = 7.813(1),b = 13.025(2),c = 14.089(2) ? = 64.89(3), = 83.98(3), = 78.11(3)海琕 = 1270.16 ?,Z = 2, Dc = 1.529 g/cm3, F(000) = 604, R = 0.0837, wR = 0.1636。锰(Ⅲ)离子的配位构型为拉长的八面体。Schiff碱配体napn2-中的N2O2在赤道平面与锰(Ⅲ)形成四配位,2个CH3OH中的O原子分别在赤道平面两侧轴向位置与锰(Ⅲ)配位。由于Jahn-Teller效应,轴向上的MnO平均键长为2.52 拧A硗猓О写嬖诜肿幽诤头肿蛹淝饧? 展开更多
关键词 锰(Ⅲ) schiff 配合物 [Mn(napn)(CH3OH)2]ClO4 合成 JAHN-TELLER效应 氢键 晶体结构 锰超氧化物歧化酶
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含有水杨醛Schiff碱氧桥连的双核铁配合物的合成与晶体结构 被引量:1
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作者 师新阁 李华兵 +1 位作者 冯勋 阮方 《洛阳师范学院学报》 2009年第2期50-52,共3页
水热法合成得到一个含有水杨醛Schiff碱的双核铁配合物(C32H30Fe2N4O5),通过元素分析、红外光谱、X射线单晶衍射等手段对结构进行了表征.该配合物属于三斜晶系,P-1空间群.晶胞参数为:a=10.9471(10)(),b=11.0577(10)(),c=13.8143(13)... 水热法合成得到一个含有水杨醛Schiff碱的双核铁配合物(C32H30Fe2N4O5),通过元素分析、红外光谱、X射线单晶衍射等手段对结构进行了表征.该配合物属于三斜晶系,P-1空间群.晶胞参数为:a=10.9471(10)(),b=11.0577(10)(),c=13.8143(13)(),α=67.9770(10)°,β=73.2580(10)°,γ=77.5730(10)°,Z=2,F(000)=684,V=1473.6(2)3,μ=1.032mm-1,R1=0.0376,wR2=0.0903.该配合物结构单元中的两个铁原子之间通过氧原子桥连,形成双核配合物.相邻的配合物分子之间通过弱氢键连接,形成二聚体. 展开更多
关键词 晶体结构 水热法合成 schiff 氢键
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Intramolecular Resonance-assisted Hydrogen Bonds in N-Salicylidene-anilines
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作者 胡志辉 陆橙荣 +1 位作者 彭海静 张德纯 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2004年第7期755-764,共10页
In the crystal structures of N-salicylidene-anilines, the ortho-OH group with the central N atom forms a planar six-membered ring through intramolecular hydrogen bonds (Fig. 1). The pseudo-aromatic ring is coplanar wi... In the crystal structures of N-salicylidene-anilines, the ortho-OH group with the central N atom forms a planar six-membered ring through intramolecular hydrogen bonds (Fig. 1). The pseudo-aromatic ring is coplanar with its attached phenyl ring. The resonance strengthens the H-bond through proton transfer between the O and N atoms (Fig. 1, I II): dCO and dCC become shorter and dCN longer significantly. The d1~d6 are also changed regularly. According to the geometries obtained from X-ray analysis and retrieved from the Cambridge Structural Database (CSD, version 5.21)[1], we believe that the main resonance, at least in solid state, is the molecular keto form (II, Fig. 1) instead of the zwitterionic one (III, Fig. 1). 展开更多
关键词 schiff bases intramolecular resonance-assisted hydrogen bond CSD conformation
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希夫碱N,N′-双水杨醛缩连氮的合成与晶体结构研究 被引量:5
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作者 刘胜利 陈勇 +1 位作者 戴静芳 刘汉文 《合成化学》 CAS CSCD 2004年第3期219-221,共3页
由水杨醛与水合肼反应生成希夫碱N ,N′ 双水杨醛缩连氮 ,并用溶液法生长其单晶。X 射线单晶结构分析表明 ,此晶体属于单斜晶系 ,P2 ( 1) /n空间群 ,晶胞参数为 :a =8.4 97( 4 ) ,b =6 .2 90 ( 3) ,c =11.789( 5 ) ,β=10 7.874 ( 7)... 由水杨醛与水合肼反应生成希夫碱N ,N′ 双水杨醛缩连氮 ,并用溶液法生长其单晶。X 射线单晶结构分析表明 ,此晶体属于单斜晶系 ,P2 ( 1) /n空间群 ,晶胞参数为 :a =8.4 97( 4 ) ,b =6 .2 90 ( 3) ,c =11.789( 5 ) ,β=10 7.874 ( 7)° ,V =5 99.6 ( 4 ) 3 ,Z =2 ,Dc =1.331g·cm-3 ,F ( 0 0 0 ) =2 5 2 ,结构偏离因子R =0 .0 4 6 9,wR2 =0 .110 8。晶体中一个分子羟基上的氧原子与另一个分子中 -CH =N -上的氢原子之间形成分子间氢键 (O┄H -C)。 展开更多
关键词 晶体结构 N N’-双水杨醛缩连氮 希夫碱 氢键 合成
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二(邻香草醛缩丙醇胺)异硫氰酸根合锰(Ⅲ)的合成与晶体结构 被引量:3
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作者 张存根 吴益华 +1 位作者 徐端钧 徐元植 《无机化学学报》 SCIE CAS CSCD 北大核心 1998年第4期431-436,共6页
本文报道了一个新配合物—二(邻香草醛缩丙醇胺根)异硫氰酸根合锰(Ⅲ)的合成及其晶体结构。配合物属于单斜晶系,空间群为P21/c,晶胞参数为:a=8565(1),b=21814(2),c=12787(2),β=... 本文报道了一个新配合物—二(邻香草醛缩丙醇胺根)异硫氰酸根合锰(Ⅲ)的合成及其晶体结构。配合物属于单斜晶系,空间群为P21/c,晶胞参数为:a=8565(1),b=21814(2),c=12787(2),β=9280(1)°。锰为六配位,在两个邻香草醛缩丙醇胺Schif碱配体中,一个为三齿配体,另一个为双齿配体。NCS-离子以N在轴向上与锰发生配位,由于JahnTeler效应,其键长为2193A。另外晶胞中存在着罕见的H……S-C≡N氢键。 展开更多
关键词 配合物 异硫氰酸盐 席夫碱 氢键 晶体
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[ZnN(CH_2CH_2NH_2)_2(CH_2CH_2N=CHC_6H_4O)]·Pic的合成与晶体结构 被引量:4
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作者 蔡正洪 唐瑜 +3 位作者 于青 刘德波 谭民裕 王宏根 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2004年第4期431-434,共4页
在不加任何碱的条件下,三[2-(亚水杨基胺)乙基]胺与苦味酸锌[Zn(Pic)26H2O]在乙醇中反应,得到了较为少见的多胺单缩合西夫碱配体的配合物[ZnN(CH2CH2NH2)2(CH2CH2N=CH-C6H4O)]Pic。化学式为C19H23N7O8Zn,Mr=542.81,晶体属三斜晶系,空... 在不加任何碱的条件下,三[2-(亚水杨基胺)乙基]胺与苦味酸锌[Zn(Pic)26H2O]在乙醇中反应,得到了较为少见的多胺单缩合西夫碱配体的配合物[ZnN(CH2CH2NH2)2(CH2CH2N=CH-C6H4O)]Pic。化学式为C19H23N7O8Zn,Mr=542.81,晶体属三斜晶系,空间群为P,晶胞参数为a=0.7494(3),b=1.1917(5),c=1.3142(6)nm,a=78.111(7),b=79.093(7),g=78.577(7),V=1.1121(8)nm3,Dc=1.621g/cm3,m(MoKa)=1.167mm-1,Z=2,F(000)=560,在1.60<q<25.03悍段谝陨璺绞绞盏蕉懒⒀苌涞?631个,其中I>2s(I)的可观测点为2433个,最终偏离因子R=0.0555,wR=0.1139。配合物中Zn(II)与配体的4个N原子和1个O原子配位形成变形的三角双锥结构,桥头N和O为锥顶,4个配位N中桥头N与金属离子的配位作用最弱。晶体通过p-p堆积和分子内、分子间的氢键作用形成二维层状超分子结构。 展开更多
关键词 [ZnN(CH2CH2NH2)2(CH2CH2N=CHC6H4O)]·Pic 合成 晶体结构 2-[2-(亚水杨基胺)乙基]胺 苦味酸锌 单缩合西夫碱配合物 氢键 超分子结构
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基于席夫碱反应的腙键共价有机聚合物的合成与表征 被引量:1
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作者 张成江 袁晓艳 +2 位作者 周亚平 王安俊 袁泽利 《功能材料》 EI CAS CSCD 北大核心 2018年第7期7183-7187,共5页
以均苯三甲酰肼(1,3,5-Benzenetricarbohydrazide,BTH)和对苯二甲醛(1,4-phthalaldehyde,PD)为有机单体构建模块,根据席夫碱(Schiff-base)反应原理和网状化学的设计思想,设计合成了一种新的腙键共价有机聚合物(BTH-PD-COP)。采用傅里叶... 以均苯三甲酰肼(1,3,5-Benzenetricarbohydrazide,BTH)和对苯二甲醛(1,4-phthalaldehyde,PD)为有机单体构建模块,根据席夫碱(Schiff-base)反应原理和网状化学的设计思想,设计合成了一种新的腙键共价有机聚合物(BTH-PD-COP)。采用傅里叶变换红外光谱(FT-IR)、固体核磁(13 C NMR)、扫描电子显微镜(SEM)、X射线粉末衍射(XRD)、热重分析(TGA)等分别对BTH-PD-COP材料进行了结构和性能表征。结果表明,BTH-PD-COP材料具有优异的物理化学性能。 展开更多
关键词 席夫碱反应 腙键 共价有机聚合物 制备 表征
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新型N,O-双官能团席夫碱配体及其镉配合物的合成、晶体结构及荧光性质(英文) 被引量:7
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作者 王彦 刘光祥 《无机化学学报》 SCIE CAS CSCD 北大核心 2009年第4期713-719,共7页
合成了一个新颖的席夫碱N,O-双管能团有机配体(4-(吡啶基-2-亚甲基氨基)苯甲酸,4,2-pmabaH)(1),并在水和乙醇体系中合成了它的镉配合物[Cd(4,2-pmaba)(H2O)3](4,2-pmaba).H2O(2)。利用元素分析及X-射线单晶结构测定对其进行了表征。标... 合成了一个新颖的席夫碱N,O-双管能团有机配体(4-(吡啶基-2-亚甲基氨基)苯甲酸,4,2-pmabaH)(1),并在水和乙醇体系中合成了它的镉配合物[Cd(4,2-pmaba)(H2O)3](4,2-pmaba).H2O(2)。利用元素分析及X-射线单晶结构测定对其进行了表征。标题化合物1属于正交晶系,Pna21空间群。化合物2属于正交晶系,Pbcn空间群。在化合物2中,Cd(Ⅱ)的配位环境为七配位。其中有2种不同配位模式的配体,其M2L2环状结构单元通过氢键作用连接成一个具有三维结构的超分子化合物。对化合物1,2的荧光性质也进行了测定。 展开更多
关键词 晶体结构 镉配合物 C-H…Π相互作用 氢键 席夫碱
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