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Molecular Ferroelastic Induced by Mono-/Double-Protonation Strategy
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作者 Jia-Qi Luo Meng-Meng Lun +4 位作者 Qiang-Qiang Jia Zhi-Jie Wang Hai-Feng Lu Yi Zhang Da-Wei Fu 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2024年第15期1706-1712,共7页
Molecular ferroelastics with the natural features of mechanical flexibility and switchable spontaneous strain have attracted widespread attention in the scientific community due to their potential applications in tuna... Molecular ferroelastics with the natural features of mechanical flexibility and switchable spontaneous strain have attracted widespread attention in the scientific community due to their potential applications in tunable gratings,flexible memorizers,strain sensors,and intelligent actuators.However,most designs of molecular ferroelastics remain in the stage of blind exploration,posing a challenge to achieve a functional ferroelastic more effectively.Herein,we have successfully obtained a molecular ferroelastic,[Me_(2)NH(CH_(2))_(2)NH_(3)](ReO_(4))_(2)(Me_(2)NH(CH_(2))_(2)NH_(3)=N,N-dimethylethylenediammonium),under the guidance of the mono-/double-protonation strategy.The_double-protonated[Me_(2)NH(CH_(2))_(2)NH_(3)](ReO_(4))_(2) undergoes a paraelastic-ferroelastic phase transition with the Aizu notation of 2/mFi at 322 K.Meanwhile,the theoretical calculation and experimental measurement simultaneously show that[Me_(2)NH(CH_(2))_(2)NH_(3)](ReO_(4))_(2) possesses good mechanical flexibility,because its elastic modulus(E)of 8.26 GPa and hardness(H)of 0.45 GPa are smaller than the average values of organic crystals(E of 12.05 GPa and H of 0.5 GPa),which makes it promising to apply in wearable pressure sensors,implantable medical sensors,high-precision tuners,etc.This work further enriches the molecular ferroelastic family and demonstrates that mono-/double-protonation is one of the effective molecular modification strategies for designing ferroelastics. 展开更多
关键词 Molecular crystal FERROELASTIC mono-/double-protonation Mechanical flexibility Phase transition Crystal engineering Computational chemistry Molecular dynamics
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Mono-Feruloyl-R, R-(+)-Tartaric Acid from Salvia chinensis 被引量:1
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作者 钱天秀 闫朝晖 黎莲娘 《Journal of Chinese Pharmaceutical Sciences》 CAS 1993年第2期148-150,共3页
报道了用半合成方法和光谱分析确证从华鼠尾草(Salvia chinensis Benth.)中分离的单阿魏酰-R,R-(+)-酒石酸的化学结构和绝对构型;合成了其 S,S-(-)-和 R,S-(meso)-酒石酸的衍生物,并分析了其间的光谱差异。
关键词 Salvia chinensis mono-feruloyl-R R-(+)-Tartaric acid Absolute configuration mono-(3 4-dimethoxycinnamoyl)-dimethyl tartarate Di-(3 4-dimethoxycinnamoyl)-dimethyl tartarate
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Synergistic extraction of rare earth by mixtures of 2-ethylhexyl phosphoric acid mono-2-ethylhexyl ester and di-(2-ethylhexyl) phosphoric acid from sulfuric acid medium 被引量:9
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作者 黄小卫 李建宁 +3 位作者 龙志奇 张永奇 薛向欣 朱兆武 《Journal of Rare Earths》 SCIE EI CAS CSCD 2008年第3期410-413,共4页
The extraction of Nd^3+ and Sm^3+, including the extraction and stripping capability as well as the separation effect of Nd^3+ or Sm^3+, from a sulfuric acid medium, by mixtures of di-(2-ethylhexyl) phosphoric a... The extraction of Nd^3+ and Sm^3+, including the extraction and stripping capability as well as the separation effect of Nd^3+ or Sm^3+, from a sulfuric acid medium, by mixtures of di-(2-ethylhexyl) phosphoric acid (HDEHP, H2A2(0)) and 2-ethylhexyl phosphoric acid mono-2-ethylhexyl ester (HEH/EHP, H2L2(0)) were studied. The distribution ratios and synergistic coefficients of Nd^3+ and Sm^3+ in different acidities were also determined. A synergistic extractive effect was found when HDEHP and HEH/EHP were used as mixed extractants for Sm^3+ or Nd^3+. The chemical compositions of the extracted complex were determined as Nd.(HA2)2-HL2 and Sm.(HA2)2-HL2. The extraction equilibrium constants, enthalpy change, and entropy change of the extraction reaction were also determined. 展开更多
关键词 di-(2-ethylhexyl) phosphoric acid 2-ethylhexyl phosphoric acid mono-2-ethylhexyl ester synergistic extraction mechanism Sm^3+ Nd^3+ rare earths
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Solvent extraction equilibrium of dysprosium(Ⅲ) from nitric acid solutions with 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester 被引量:1
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作者 HUANG Ying TANAKA Mikiya 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2010年第4期707-711,共5页
In view of the importance of solvent extraction of rare earth metals with the acidic organophosphorous reagent,the development of a chemically based model applicable to high concentration is desired.In the present stu... In view of the importance of solvent extraction of rare earth metals with the acidic organophosphorous reagent,the development of a chemically based model applicable to high concentration is desired.In the present study,the equilibrium distribution of dysprosium(Ⅲ)between an aqueous nitric acid solution and 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester (PC88A)was measured in the range of an initial aqueous dysprosium(Ⅲ)concentration from 1.0×10-3to 1.0×10-1kmol/m 3and PC88A concentration from 0.16 to 0.65 kmol/m3in Shellsol D70 as the diluent.The obtained data were analyzed using the chemically based model in order to correlate the equilibrium distribution ratios.In this model,dysprosium(Ⅲ)was assumed to be extracted with the PC88A dimer as a 1:3 complex,the activities were considered for the aqueous species,and the effective concentration of the PC88A dimer was calculated using Alstad's empirical equation.As a result,the apparent extraction equilibrium constant was determined to be 253(kmol·m- 3)-2with an excellent correlation between the experiment and calculation results in the wide range of the logarithm of the distribution ratio from-2 to 3.5.In conclusion,the methodology in this model would be effective for quantitative description of solvent extraction behavior of general rare earth elements as well as dysprosium. 展开更多
关键词 solvent extraction DYSPROSIUM 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester(PC88A) nitric acid EQUILIBRIUM
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Synergistic extraction of praseodymium with 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester and 8-Hydroxyquinoline 被引量:1
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作者 张倩 乌东北 包伯荣 《Journal of Shanghai University(English Edition)》 CAS 2009年第1期72-75,共4页
The synergistic extraction of Pr^3+ from hydrochloric medium using mixture of 2-ethylhexyl phosphonic acid mono- 2-ethylhexyl ester (P507, HL) and 8-Hydroxyquinoline (HQ) in heptane was investigated. The effect o... The synergistic extraction of Pr^3+ from hydrochloric medium using mixture of 2-ethylhexyl phosphonic acid mono- 2-ethylhexyl ester (P507, HL) and 8-Hydroxyquinoline (HQ) in heptane was investigated. The effect of equilibrium of aqueous acidity on extraction of Pr^3+ was discussed. The effect of extractant concentraction, different diluents, equilibrium time and acetate ion concentration oil extraction reaction were also studied. With a method of double-logarithmic slope, composition of the extracted species on 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester and 8-Hydroxyquinoline was derived. The result shows that the synergistic extraction system not only overcomes emulsification of 8-Hydroxyquinoline, but also shows perfect capacity of synergistic extraction. The largest synergistic enhancement factor can be calculated to be 5.49 at pH 3.6 for Pr^3+. 展开更多
关键词 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester 8-Hydroxyquinoline (HQ) synergistic extraction praseodymium
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Cortical Arousal Strategies in Left-Handers during the Aural Perception and Manual Playback of Mono-and Polyphonic Rhythmical Patterns
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作者 Pavlovych Olga Sergiyivna Morenko Alevtyna Grigorivna Kotyk Olena Adamivna Vlasjuk Svitlana Sergiyivna 《Journal of Life Sciences》 2012年第12期1408-1413,共6页
The actual purpose of this study is to establish the cortical arousal strategies (according to the power of the EEG (electroencephalogram) a-oscillations) during the aural perception as well as manual playback of ... The actual purpose of this study is to establish the cortical arousal strategies (according to the power of the EEG (electroencephalogram) a-oscillations) during the aural perception as well as manual playback of mono- and polyphonic rhythmical patterns in men with left profile. The study involved 35 men from 19 to 21 years old with the left profile of the manual and aural asymmetries. EEG was recorded in the functional status of rest: during the aural perception and playback of mono- and polyphonic rhythmical patterns with the left and right hand fingers. The monophony in the rhythmical pattern sounding relative to monophonic patterns is followed by more expressed and widespread cortical processes of the EEG a-oscillation depression. Given patterns indicate a greater intensity of ascending nonspecific arousal strategies of data processing by men on conditions of the sound and harmonious complications of the pattern structure. The aural perception and playback of rhythmical patterns with both hands were accompanied by the increased significance of arousal processes in the right hemisphere. This may be due to the dominant role of the hemisphere during the formation of the innervation impacts on the left-hander's neuro-motor apparatus. More differentiated changes in the cerebral cortex were installed during the left hand activation. 展开更多
关键词 LEFT-HANDERS mono- and polyphonic sounding alpha rhythm rhythmic sense.
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Probiotic Bio-Three induces Th1 and anti-inflammatory effects in PBMC and dendritic cells 被引量:23
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作者 Man-Chin Hua Tzou-Yien Lin +3 位作者 Chien-Chang Chen Ming-Wei Lai Man-Shan Kong Hung-Ju Chang 《World Journal of Gastroenterology》 SCIE CAS CSCD 2010年第28期3529-3540,共12页
AIM:To investigate the immune response of peripheral blood mononuclear cells(PBMCs)and dendritic cells (DCs)that were stimulated by probiotic preparations. METHODS:PBMCs were isolated,cultured,and stimulated with Bio-... AIM:To investigate the immune response of peripheral blood mononuclear cells(PBMCs)and dendritic cells (DCs)that were stimulated by probiotic preparations. METHODS:PBMCs were isolated,cultured,and stimulated with Bio-Three(a mixture of Bacillus mesentericus, Clostridium butyricum and Enterococcus faecalis;105, 10 6 and 10 7 CFU/mL for 24 h).Cytokine production of (1)circulating PBMCs;(2)PBMCs stimulated by probiotic preparation;(3)monocyte-derived DCs;and(4)DC andT cell co-culture was determined by enzyme-linked immunosorbent assay.Phenotypic analysis of circulating PBMCs was also investigated by flow cytometry.Blood was obtained from individuals who consumed Bio-Three (10 9 CFU/d B.mesentericus,C.butyricum and E.faecalis) for 2 wk,or those who did not take probiotics orally. RESULTS:In culture supernatants,interferon-γ(IFN-γ) and interleukin(IL)-10 production increased,but IL-4 and tumor necrosis factor-α(TNF-α)production by PBMCs decreased after 1 and 2 wk of probiotic treatment.Flow cytometry was also performed on day 14 and detected enhanced expression of CD11b,HLA-DR, CD4,CD45RA,CD25,CD44 and CD69 in response to Bio-Three.Furthermore,IL-10 and IL-12 were upregulated in supernatants of monocyte-derived DCs,and IFN-γand IL-10 were enhanced in supernatants of CD4 + T cells co-cultured with DCs. CONCLUSION:Bio-Three appeared to stimulate the Th1 immune response,downregulate pro-inflammatory cytokines(TNF-α)and upregulate anti-inflammatory cytokine(IL-10).Probiotics could be effective in activation of PBMCs and DCs. 展开更多
关键词 PROBIOTICS Bio-Three Peripheral blood mono- nuclear cells Dendritic cells
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Synthesis and Crystal Structure of[C_6H_5CH_2C_5H_4ErCl_2(THF)_3]·THF 被引量:1
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作者 Gao Fu-Xing Wei Ge-Cheng +1 位作者 Jin Zhong-Sheng Chen Wen-Qi (Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022)Zhang Yin (Jilin Educational College, Changchun) 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 1994年第4期247-251,共5页
C_6H_5CH_2C_5H_4ErCl_2(THF)_3]·THF, Mr=681.9, monoclinic,space group P2_1/n, with a=11. 622(5), b=10. 281(4), c=26. 040(5),β=86. 65 (4)°,V=3106 (3), Z=4, Dc=1. 46 gcm ̄(-3),μ=30. 0 cm ̄(-1), F (000)=1380. ... C_6H_5CH_2C_5H_4ErCl_2(THF)_3]·THF, Mr=681.9, monoclinic,space group P2_1/n, with a=11. 622(5), b=10. 281(4), c=26. 040(5),β=86. 65 (4)°,V=3106 (3), Z=4, Dc=1. 46 gcm ̄(-3),μ=30. 0 cm ̄(-1), F (000)=1380. The final R value is 0. 040 for 1911 independent observed reflections (I>3σ(I)). The geometry around the erbium ion is described as an approximate octahedron with the centroid of the benzylcyclopentadienyl rings, the oxygens of three THF's and two chlorine atoms forming the apices of the octahedron. The average distance of Er-C(Cp'ring) is 2. 66A. 展开更多
关键词 ORGANOLANTHANIDES mono-(monosubstituted-cyclopentadienyl) erbium complexes synthesis and structure.
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Chlorine-radical Induced Oxidation of Glyoxal and Glyoxal-S(IV) Adducts in the Aqueous Phase
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作者 YingLI YunTANG JiaQiangWANG 《Chinese Chemical Letters》 SCIE CAS CSCD 2005年第1期119-122,共4页
A laser flash photolysis study of the reactivity of Cl˙with glyoxal, glyoxal mono- and dibisulfite adducts, 1-hydroxy-2, 2-diol-ethanesulfonate and 1, 2-dihydroxy-1, 2-ethanedi sulfonate in the aqueous phase was ca... A laser flash photolysis study of the reactivity of Cl˙with glyoxal, glyoxal mono- and dibisulfite adducts, 1-hydroxy-2, 2-diol-ethanesulfonate and 1, 2-dihydroxy-1, 2-ethanedi sulfonate in the aqueous phase was carried out. The obtained rate constants can be used for atmospheric modeling. 展开更多
关键词 Chlorine-radical GLYOXAL glyoxal mono- and dibisulfite adducts aqueous phase rate constants.
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Synthesis, fluorescence properties of Tb(Ⅲ) complexes with novel mono-substituted β-diketone ligands 被引量:4
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作者 罗一鸣 李石凤 +2 位作者 李军 陈学娟 唐瑞仁 《Journal of Rare Earths》 SCIE EI CAS CSCD 2010年第5期671-675,共5页
Two novel pyridine-2,6-dicarboxylic acid derivatives of mono-β-diketone named methyl 6-biphenylacetyl-2-pyridinecarboxylate (MBP) and 6-biphenylacetyl-2-pyridinecarboxylic acid (BAA) and their corresponding binary co... Two novel pyridine-2,6-dicarboxylic acid derivatives of mono-β-diketone named methyl 6-biphenylacetyl-2-pyridinecarboxylate (MBP) and 6-biphenylacetyl-2-pyridinecarboxylic acid (BAA) and their corresponding binary complexes Tb(MBP)3.6H2O and Tb(BAA)3·6H2O were synthesized. The ligands were characterized by elemental analysis, FT-IR and 1H-NMR, and the complexes were characterized with elemental analysis, FT-IR, 1H-NMR and thermogravimetric and differential thermal analysis(TG-DTA). The investigation of fluo... 展开更多
关键词 organic ligand mono-β-diketone SYNTHESIS fluorescence property rare earth ion
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Cytotoxic effects of mono-(2-ethylhexyl) phthalate on human embryonic stem cells 被引量:6
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作者 SHI Cheng CHEN Xi +4 位作者 CAI Xiao-hui YU Wei-dong LIANG Rong LU Qun SHEN Huan 《Chinese Medical Journal》 SCIE CAS CSCD 2013年第9期1714-1719,共6页
Background Mono-(2-ethylhexyl) phthalate (MEHP), the metabolite of di-(2-ethylhexyl) phthalate (DEHP), was suspected to be toxic to human embryos. This study contributes to investigating its toxic effects by a... Background Mono-(2-ethylhexyl) phthalate (MEHP), the metabolite of di-(2-ethylhexyl) phthalate (DEHP), was suspected to be toxic to human embryos. This study contributes to investigating its toxic effects by an embryonic stem cell test (EST) based on two human embryonic stem cell (hESCs) lines. Methods CH1 established in our own lab and H1, a federally registered cell line were two human embryonic stem cell lines used in this test. Four endpoint measurements were performed consisting of cell viability, proliferation ability, apoptosis as well as changes of gene expression patterns after spontaneous differentiation were determined. For measuring effects on the first three endpoints, the cells were treated with various concentrations of MEHP dissolved in dimethyl sulfoxide (DMSO) and only with DMSO which served as control and harvested after 5 days. For measuring effects during spontaneous differentiation, the RNA of embryoid bodies (EBs) formed after 8 days' MEHP exposure was collected and changes in differentiation specific gene expression patterns were analyzed by quantitative real time RT-PCR. Results As a result the viability and proliferation ability of both cell lines decreased significantly at 1000 μmol/L MEHP, while there was no effect on apoptosis or cell morphology. In addition MEHP also changed the gene expression pattern in the EBs of both cell lines. Conclusion MEHP in a high dose was cytotoxic and affected the development of hESCs, which indicates its embryo toxicitv in human embrvos. 展开更多
关键词 human embryonic stem cell lines mono-(2-ethylhexyl) phthalate CYTOTOXICITY DEVELOPMENT cell differentiation
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SOLVENT EXTRACTION OF LANTHANIDES BY 2-ETHYLHEXYLPHOSPHONIC ACID MONO-2-ETHYLHEXYL ESTER 被引量:1
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作者 马恩新 严小敏 +2 位作者 王三益 龙海燕 袁承业 《Science China Mathematics》 SCIE 1981年第9期1237-1247,共11页
The chemistry of extraction of lanthanide and yttrium by 2-ethylhexylphosphonic acidmono-2-ethylhexyl ester in n-dodecane from nitric acid is described. By M W determination, NMR and the slope method, the extraction r... The chemistry of extraction of lanthanide and yttrium by 2-ethylhexylphosphonic acidmono-2-ethylhexyl ester in n-dodecane from nitric acid is described. By M W determination, NMR and the slope method, the extraction reaction is studied.Based upon elementery analyses, IR, NMR as well as MW determination, the compositions ofthe complexes formed with La(NO3)3 and Nd(NO3)3 are studied. Both the standard enthalprchanges(-△H°) and the relative free energy and entropy changes (-△Zr°)(△SPr°)of the ex-.traction reaction are also estimated. The regularity of the variations of Kea(concentrationequilibrium constant), -△AZr° and △Sr°reveals the tetrad effect. The average separationfactor of the adjacent lanthanides is calculated to be as high as 3.04. 展开更多
关键词 SOLVENT EXTRACTION OF LANTHANIDES BY 2-ETHYLHEXYLPHOSPHONIC ACID mono-2-ETHYLHEXYL ESTER
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The synthesis of mono-6-thio-β-cyclodextrin capped CdTe QDs and its interaction with neutral red
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作者 WANG Lei,LIU ShaoPu,PENG JuanJuan & HE YouQiu Key Laboratory on Luminescence and Realtime Analysis,Ministry of Education School of Chemistry and Chemical Engineering,Southwest University,Chongqing 400716,China 《Science China Chemistry》 SCIE EI CAS 2010年第6期1358-1365,共8页
This paper presents a novel method for the synthesis of CdTe quantum dots (QDs) capped with β-cyclodextrin in aqueous solution using both TGA and mono-6-thio-β-CD as stabilizers.The interaction between mono-6-thio-... This paper presents a novel method for the synthesis of CdTe quantum dots (QDs) capped with β-cyclodextrin in aqueous solution using both TGA and mono-6-thio-β-CD as stabilizers.The interaction between mono-6-thio-β-CD-CdTe QDs and neutral red (NR) was studied with fluorescence,UV-absorption and the resonance Rayleigh scattering spectrum.When its concentration was over 7.5 × 10-6 mol/L,the neutral red began to aggregate on the surface of the mono-6-thio-β-CD-CdTe QDs,which resulted in the mono-6-thio-β-CD-CdTe QDs particle size increasing,the sharply quenched fluorescence,and the marked increase of RRS intensity. 展开更多
关键词 mono-6-thio-β-Cyclodextrin CDTE quantum DOTS thioglycolic acid NEUTRAL red
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Layer-by-layer Assembled Multilayers of Graphene/Mono-(6-amino-6-deoxy)-β-cyclodextrin for Detection of Dopamine
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作者 Lin Tan Guo Wang +2 位作者 Nali Chen Jianqiang Zhang Huixia Feng 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2015年第2期185-191,共7页
Graphene/mono-(6-amino-6-deoxy)-β-cyclodextrin multilayer films composed of graphene sheet(GS)and mono-(6-amino-6-deoxy)-β-cyclodextrin(NH_(2)-β-CD)were fabricated easily by two steps.First,negatively charged graph... Graphene/mono-(6-amino-6-deoxy)-β-cyclodextrin multilayer films composed of graphene sheet(GS)and mono-(6-amino-6-deoxy)-β-cyclodextrin(NH_(2)-β-CD)were fabricated easily by two steps.First,negatively charged graphene oxide(GO)and positively charged mono-(6-amino-6-deoxy)-β-cyclodextrin(NH_(2)-β-CD)were layer-by-layer(LBL)self-assembled on glassy carbon electrode(GCE)modified with a layer of poly(diallyldimethylammo-nium chloride)(PDDA).Then graphene/mono-(6-amino-6-deoxy)-β-cyclodextrin(GS/NH_(2)-β-CD)multilayer films were built up by electrochemical reduction of graphene oxide/mono-(6-amino-6-deoxy)-β-cyclodextrin(GO/NH_(2)-β-CD).Combining the high surface area of GS and the active recognition sites onβ-cyclodextrin(β-CD),the GS/NH_(2)-β-CD multilayer films show excellent electrochemical sensing performance for the detection of DA with an extraordinary broad linear range from 2.53 to 980.05μmol•L^(−1).This study offers a simple route to the controlla-ble formation of graphene-based electrochemical sensor for the detection of DA. 展开更多
关键词 DOPAMINE layer-by-layer GRAPHENE mono-(6-amino-6-deoxy)-β-cyclodextrin
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