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Electrochemical Studies of Glutathione Monolayer Assembled on A Polycrystalline Gold Electrode

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wuhan university Journal of Natural sciences 2002年第1期7卷 102-106页

作者： Fang Cheng, zhou Xing-yao  college of chemistry and molecular sciences, wuhan university, wuhan 430072, hubei, china wuhan university College of Chemistry and Molecular Sciences Wuhan Hubei China (GRID:grid.49470.3e) (ISNI:***)

The glutathione (GSH) monolayer and complex monolayer of GSH-metallic ion on polycrystalline gold electrode were studied by using K3Fe(CN)6 as the redox probe. As for the GSH monolayer, it was found that the metallic ions could open the ion-gate in the monolayer dramatically in the order La3+> Pb2+>>Ba2+>Ca2+ whereas Zn2+ ion closed the ion-gate. The complexes of GSH-metallic ions were capable of self-assembling the different kind of monolayer. All the differences were related to the structural configuration of the anchored GSH molecule, which changed with different metallic ions or pH.

关键词： glutatione monolayer complex voltammetry and ac impedance

Immunomagnetic assay combined with CdSe/ZnS amplification of chemiluminescence for the detection of abscisic acid

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Science china chemistry 2011年第8期54卷 1298-1303页

作者： zhou GuoHua, WANG Ping, YUAN Ju, QIU Ting & HE ZhiKe Key Laboratory of Analytical chemistry for Biology and Medicine, Ministry of Education college of chemistry and molecular sciences, wuhan university, wuhan 430072, china 1. Key Laboratory of Analytical chemistry for Biology and Medicine Ministry of Education college of chemistry and molecular sciences Wuhan University Wuhan 430072 China

Abscisic acid (ABA) is an important plant hormone. It plays a key role in regulating plant responses to abiotic stress and in controlling seed germination, growth, and stomatal aperture. A rapid, sensitive analytical method for the ABA detection is urgently required for further investigation of ABA signaling. In this work, an immunomagnetic assay combined with CdSe/ZnS amplification of chemiluminescence has been developed for the detection of ABA. The result could be read out in 30 min at least, with the simplified procedure of immunomagnetic assay. Under the optimized condition, a linear range from 1 pM to 10 nM was obtained. An unexpected result induced by the dose hook effect was discussed. This method provided the high selectivity for ABA over other components that might be contained in real samples.

关键词： abscisic acid immunomagnetic assay chemiluminescence CdSe/ZnS

Chitosan-Pectin Synergistic Interaction and Gelation

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wuhan university Journal of Natural sciences 2001年第4期6卷 826-830页

作者： He Dong bao, Shi Yi, zhan Dong feng, Fong Feng college of chemistry and molecular Science, wuhan university, wuhan 430072, china wuhan university College of Chemistry and Molecular Science Wuhan China (GRID:grid.49470.3e) (ISNI:***)

Mixed gels of chitosan-pectin were prepared by varying the ratio of constituents in the presence of NaCl. Mixed gel at 3%of total polysaccharide concentration with addtion of 12%NaCl showed a synergistic maximum when the ratio of chitosan to pectin was 60: 40. The effect of the polysaccharide concentration, the preparation temperature (T p), the time of incubation, balk salt concentration, the molecular weight and the degree of deacetylation of chitosan on gelation have been studied. Interaction mechanism between molecules of both polysaccharides was investigated by FT-IR spectrometry.

关键词： chitosan pectin synergistic interaction gelation

The Electrochemical Properties of Thionine Adsorbed Monolayer on Gold Electrode

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wuhan university Journal of Natural sciences 2001年第4期6卷 846-850页

作者： Fang Cheng, Liu Yue lin, zhou Xing yao  college of chemistry and molecular Science, wuhan university, wuhan 430072, china wuhan university College of Chemistry and Molecular Science Wuhan China (GRID:grid.49470.3e) (ISNI:***)

A gold electrode modified with adsorbed thionine monolayer was investigated with ac impedance and cyclic voltammetry method. It was found there were some different redox properties for the adsorbed thionine depended on the different potential scanning rate. At the slower potential scanning rate (10 mV? s?1), the dimer of thionine appeared and possessed the catalytic activity for the oxidation of ascorbic acid. The underpotential deposition (UPD) and the bulk deposition of Cu2+ were also employed to investigate the monolayer of adsorbed thionine.

关键词： Key words thionine monolayer ac impedance voltammetry

Polymer-supported chiral palladium-based complexes as efficient heterogeneous catalysts for asymmetric reductive Heck reaction

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Green Synthesis and Catalysis

Green Synthesis and Catalysis 2024年第2期5卷 102-107页

作者： hui zhang Bing Xu Liejin zhou zhan-Ming zhang Junliang zhang college of Marine Ecology and Environment Shanghai Ocean University999 Hucheng Ring RoadShanghai 201306China Department of chemistry Fudan University2005 Songhu RoadShanghai 200438China Graduate School of Pharmaceutical sciences Tohoku UniversitySendai 980-8578Japan Fudan zhangjiang Institute Shanghai 201203China

Heterogeneous asymmetric catalysis is an important strategy for the industrial production of chiral ***,we reported a polymer-bound Xu-Phos-derived palladium catalyst that shows good performance in heterogeneous asymmetric reductive Heck reaction of allyl aryl *** heterogeneous catalyst was easily prepared by efficient immobilization of the sulfonamide phosphine ligand(Xu-Phos)in the cross-linked polystyrene via copolymerization,and exhibits similar catalytic activity and enantioselectivity to that of the homogeneous ***,the heterogeneous catalyst system is proved to be easily recovered and reused several times without losing catalytic activity obviously.

关键词： Heterogeneous catalysis Recoverability Palladium Hydroarylation Asymmetric catalysis

Surface Films Formed on SnO_2 Anode in Lithium Secondary Batteries by FTIR Spectroscopy

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Journal of wuhan university of Technology(Materials Science) 2008年第5期23卷 662-665页

作者：黄峰 hubei Refractories and High-temperature Ceramics Key Laboratory Wuhan University of Science and Technology

The chemical composition of the passivating layer formed on nano SnO2 anodes in 1 M LiClO4＋（ethylene carbonate）EC ＋（dimethyl carbonate）DMC at different charge/discharge states in lithium secondary batteries was studied using extra reflectance FTIR spectra. Results show that solvent decomposition reaction that generally occurs on the surface of carbon and alkali metal electrodes also takes place on nano-SnO2 anode, and the major constituent of the passivating layer is Li2CO3 and ROCO2Li. Formation of the passivating layer would certainly lead to the irreversible capacity loss.

关键词： nano-SnO2 anode lithium rechargeable batteries FTIR passivating layer

taBOX: A water-soluble tetraanionic rectangular molecular container for conjugated molecules and taste masking for berberine and palmatine

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Chinese Chemical Letters 2024年第5期35卷 175-178页

作者： Qihan Lin Jiabin Xing Yue-Yang Liu Gang Wu Shi-Jia Liu hui Wang Wei zhou zhan-Ting Li Dan-Wei zhang Department of chemistry Shanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsFudan UniversityShanghai 200438China

A water-soluble macrocycle that bears four carboxylate anions has been designed and prepared,which forms a rectangular cavity that can efficiently encapsulate discrete electron-deficient aromatic compounds,including berberine and *** macrocycle is revealed to be highly biocompatible and able to inhibit the bitter taste of the two drugs.

关键词： Macrocycle Multianion molecular container molecular recognition Bitter taste masking

Separation of Dopamine and Epinephrine by a Novel Electrophoresis Technique with Nafion Membrane as Separation Column

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wuhan university Journal of Natural sciences 2004年第1期9卷 102-104页

作者： FangCheng WuBing-liang zhangWu-ming zhouXing-yao collegeofchemistryandmolecularsciences WuhanUniversityWuhan430072HubeiChina

A novel electrophoresis technique, in which a strip of perflurosulfonic-acid (nafion 117) membrane was used to replace the conventional separation column and liquid buffer solution within, was developed and employed to separate the mixture of dopamine and epinephrine under a low separation voltage of 100 V with quadruple pulses amperometry detection. It was showed that the so-called Nafion membrane electrophoresis could be one of very simple and easy method and has the potentiality to be used to separate and analyze some small organic biologic molecules. Key words nafion membrane - electrophoresis - electrochemical detector - dopamine - epinephrine CLC number O 657. 7 Foundation item: Support by the Foundation of Electroanalytical chemistry Open Lab (203231510), Changchum, china.Biography: Fang Cheng (1971-), male, Lecture, Ph. D, research direction: Electroanalysis.

关键词： nafion membrane electrophoresis electrochemical detector dopamine epinephrine

一个新的结构信息指数Y_M及其与二元氧化物光学碱度的相关关系研究

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武汉大学学报（理学版） 2001年第4期47卷 415-418页

作者：周新花余训民武汉大学化学与分子科学学院湖北武汉430072

提出了一个新的结构信息拓扑指数 YM,并用 YM研究了二元氧化物光学碱度的新标度 .结果表明 ,YM与二元氧化物的光学碱度呈良好的线性关系 .计算了 10 0余个二元氧化物的光学碱度值 ,结果与二元氧化物的实际酸碱性顺序符合得很好 .新方法... 详细信息

提出了一个新的结构信息拓扑指数 YM,并用 YM研究了二元氧化物光学碱度的新标度 .结果表明 ,YM与二元氧化物的光学碱度呈良好的线性关系 .计算了 10 0余个二元氧化物的光学碱度值 ,结果与二元氧化物的实际酸碱性顺序符合得很好 .新方法可标度周期表中二元氧化物的光学碱度 .

关键词：拓扑指数二元氧化物光学碱度结构信息指数线性关系分子拓扑学