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Synthesis of cystine C_(60) derivative and its protective effects on hydrogen peroxide-induced apoptosis in PC12.cells

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Chinese Chemical Letters 2007年第2期18卷 145-148页

作者： Zhen Hu, Hai Ping Xing, Zhou Zhu, Wei Wang, Wen Chao Guan Department of chemistry, Huazhong university of Science and Technology,{2., china Department of Neurology, Tongji Hospital, Tongji Medical college, wuhan 430030, china Department of chemistry Huazhong University of Science and Technology Wuhan 430074 China Department of Neurology Tongji Hospital Tongji Medical College Wuhan 430030 China

Oxidative stress has been considered as a major cause of cellular injuries in a variety of clinical abnormalities, especially prominent in neural diseases. One of the usable ways to prevent the reactive oxygen species (ROS)-mediated cellular injury is dietary or pharmaceutical augmentation of some free radical scavenger. Water-soluble amino-fullerene is a novel compound that behaves as a free radical scavenger with excellent biology consistent. In the present study, we have synthesized and characterized a novel cystine C60 derivative for the first time, and investigated the effects on hydrogen peroxide-induced oxidative stress and apoptotic death in cultured rat pheochromocytoma (PC12. cells. PC12.cells treated with hydrogen peroxide underwent apoptotic death as determined by MTT, PI/Hoechst 33342.staining and flow cytometry analysis. These results suggested that cystine C60 derivative has the potential to prevent oxidative stress-induced cell death and has no evident toxicity.

关键词： Cystine C_(60) derivative Reactive oxygen species H_2._2 Apoptosis PC 12.cells

Characterization and Electrochemical Properties of LiMn_2._4 Thin Films Prepared by Solution Deposition

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Journal of wuhan university of Technology(Materials Science) 2006年第3期21卷 54-56页

作者：吴显明 college of chemistry and Chemical Engineering Jishou UniversityJishou 416000China

LiMn2.4 thin films were prepared by solution deposition using lithium acetate and manganese acetate us raw materials. The phase constitution and surface morphalogy were observed by X-ray diffraction and scanning electron microscopy. The electrochemical properties of the thin films were studied by cycilc voltammetry, charge- discharge experiments and impedance spectroscopy in 1 mol· L^-1 LiPF6 / EC- DMC solution using lithium metal as both the counter and reference electrodes. The films prepared by this method are of spinel phase. The lattice parameter increases with the annealing temperature aud annealing time. The film annealed at 750 ℃ for 30 minutes has the highest capacity of 34.5 μAh ·cm^- 2.μm^-1 , and its capacity loss per cycle is 0. 05% afrer being cycled 100 times.

关键词： thin films lithium manganese oxide lithium-ion battery solution deposition

Study on Laccase-Catalyzed Oxidation of Disubstituted Ferrocene and π-arene-π- cyclopentadienyliron Derivatives

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wuhan university Journal of Natural {2. 2000年第3期5卷 351-356页

作者： Ji Li-cai1, Hu Pei-zhi2. Jin Chang-hua3 , Ding Zi-rong2.1. college of Adult Education, wuhan {2., wuhan 430072. china 2. Col lege of chemistry and Environment Science, wuhan {2., wuhan 430072. C hina 3,Yiping Plant of chemistry and Industry at Zhong Qing City, Zhong Qing 63132., china college of Adult Education Wuhan University Wuhan 430072 China college of chemistry and Environment Science Wuhan University Wuhan 430072 China Yiping Plant of chemistry and Industry at Zhong Qing City Zhong Qing 631323China

It is studied that Rhus vernicifera laccase catalyzed oxidation of 2. disubstituted ferrocene and its metal complexes, π-arene-π-cyclopentadienyliron derivatives and metal meso-(tetra-4-sulfanatophenyl)porphyrin in the diethylene glycol monobutyl ether (DGBE)/phosphate buffer (V/V, 1/5). It is found that 1,1′-bishydroxylmethyl ferrocene etc 16 compounds are new substrates of laccase. The relation of structure and function of substrates is discussed. The affective factors of laccase-catalyzed oxidation of 1,1′-bishydroxyl-methyl ferrocene—pH, temperature, substrate concentration, laccase quantity and surfactant were investigated further.

关键词： Key words Rhus vernicifera laccase disubstituted ferrocene catalytic oxidation π arene π cyclopentadienyliron

SiO/CNTs:A new anode composition for lithium-ion battery

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Science china chemistry 2009年第12期52卷 2047-2050页

作者： REN YuRong1,2.3?,QU MeiZhen1 & YU ZuoLong1 1 Chengdu Institute of Organic chemistry,Chinese Academy of sciences,Chengdu 610041,{2. 2.college of chemistry,Jilin Normal university,Siping 136000,{2. 3 Graduate university of Chinese Academy of sciences,Beijing 100039,{2. Chengdu Institute of Organic chemistry Chinese Academy of Sciences Chengdu China college of chemistry Jilin Normal University Siping China Graduate university of Chinese Academy of sciences Beijing China

A new anode composition SiO/CNTs (carbon nanotubes) has been prepared by chemical vapor deposition (CVD) method. The results of scanning electron microscopy (SEM) confirm that CNTs deposit on small SiO particles,form a cage,and enwrap SiO particles tightly. SiO/CNTs anode composition exhibits an initial discharge and charge capacity of 1171 and 789 mAh/g,and maintains a reversible capacity of 500 mAh/g after 80 cycles. The improvement of the cyclic performance for SiO/CNTs composition is related to the maintaining of the electric network during cycling,which benefits from a tight contact between CNTs and SiO particles.

关键词： SiO/CNTs CVD composition anode Li-ion battery

Utilization of a spiropyran derivative in a polymeric film optode for selective fluorescent sensing of zinc ion

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Science china chemistry 2006年第3期49卷 246-255页

作者： ZHANG Ying1, SHAO Na1, YANG Ronghua1, LI Ke’an1, LIU Feng1, CHAN Winghong2.& MO Tian2.1. college of chemistry and Molecular Engineering, Peking {2., Beijing 100871, china 2. Department of chemistry, Hong Kong Baptist {2., Hong Kong, china college of chemistry and Molecular Engineering Peking University Beijing China Department of chemistry Hong Kong Baptist University Hong Kong China

A new spiropyran derivative was synthesized and first utilized in a polymericfilm-based optical sensor for zinc ion. Spiropyrans, combining the characteristics of metal bindingand signal transduction, show potential function in the design of optical chemical sensors(optodes) toward metal ions. When embedded in a plasticized poly (vinyl chloride) (PVC) membrane,the newly synthesized spiropyran derivative 1 exhibits obvious fluorescence enhancement at 630 nm inthe presence of zinc ion in aqueous solution. With the optimum condition described, the optodemembrane responds to zinc ion over a dynamic range of 4.94x10^(-7) to 4.15x10^(-4)mol·L^(-1), witha detection limit of 1.51x10^(-7) mol·L^(-1). The membrane not only displays excellentphotostability, reproducibility and reversibility, but also exhibits high selectivity toward zincion over transition metal ions including Hg^(2.), Cd^(2.), Pb^(2.), Cu^(2.), Fe^(3+) and commoncationic ions presented in the physiological fluids.

关键词： spiropyran, sensor, PVC membrane, zinc ion, fluorescent spectroscopy.

甾体药物源植物薯蓣属植物中薯蓣皂甙元的研究及生产状况

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天然产物研究与开发 2002年第3期14卷 89-93页

作者：宋发军中南民族大学化学与生命科学学院生物技术综合实验室武汉430074

本文对薯蓣属植物的资源分布、化学成分、薯蓣皂甙元的应用价值及提取工艺进行了概述 ,通过对其研究及生产现状的分析 ,表明该产业具有较好的发展前景。

关键词：薯蓣属植物薯蓣皂甙元生产工艺

Mathematic Expression of Kinetic Compensation Effect and Relationship between the Exothermic Decomposition Temperature and Critical Temperature of Thermal Explosion of Eighty-six Energetic Materials

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含能材料 2001年第1期9卷 8-9页

作者： HU Rong zu 1, YANG De suo 2. ZHANG Jiao qiang 3 (1. Department of chemistry,Northwest university, Xi′an 710065,{2. 2. Department of chemistry and Chemical Engineering, Baoji college of Arts and Science, Baoji 72.007,{2. 3. Department of 西北大学陕西西安 710065 宝鸡文理学院陕西 721007 西北工业大学陕西西安 710072

Two relationships are established using the least squares method,between the kinetic parameters (the apparent activation energy and pre exponential constant),and the exothermic decomposition temperature and ther... 详细信息

关键词： critical temperature of thermal explosion decomposition temperature DSC energetic materials.

Synthesis and Thermal Stability of Antimony Tris (Thioethyl Stearate) for PVC

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Journal of central south {2. 2000年第3期12卷 146-148页

作者： LIU You nian,WANG Chun jiang,SHU Wan gen,ZENG Dong ming,Chen Qi yuan (college of chemistry and Chemical Engineering, {2. south university, Changsha 410083, china) college of chemistry and Chemical Engineering Central South University Changsha China

A novel type of thermal stabilizer-antimony tris (thioethyl stearate) (ATS) was synthsized. Its thermal stability was measured by heat-aging oven test when incorporated into PVC. ATS was synthesized from stearic acid, antimony trioxide and 2.mercaptoethanol in two steps. The reaction conditions of synthesis were optimized through orthogonal test. Experimental results show that the molar ratio of stearic acid and antimony tris (2.hydroxyethylthiolate) was 1.2. adding 0.6%tetra-n-butyl titanate as catalyst and xylene as azeotropic solvent, heating and refluxing for about 4 h, and the yield of ATS is 83.9%. The thermal stability time is about 40 min(at 2.0 °C) when added 2.hr(per hundred resin) in PVC. The thermal stability of ATS is better than that of Ca-Zn complex and basic lead stabilizers, and equal to that of dibutyltin dilaurate.

关键词： thermal stabilizer antimony thiolate synthesis thermal stability

Porous Y_2._3 microcubes:synthesis and characterization

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Rare Metals 2011年第6期30卷 577-582页

作者： DENG Bin DING Liwen CHEN Jianjun ZHONG Shengliang Department of chemistry and life {2. Xiangnan University Chenzhou 423000 China college of chemistry and Chemical Engineering Jiangxi Normal University Nanchang 330022 China Division of Nanomaterials and chemistry Hefei National Laboratory for Physical Sciences at Microscale University of Science and Technology of China Hefei 230026 China

In this work, a facile route using a simple solvothermal reaction and sequential heat treatment process to prepare porous Y2.3 microcubes is presented. The as-synthesized products were characterized by X-ray powder diffraction （XRD）, scanning electronic microscope （SEM）, energy dispersive spectrometer （EDS）, thermogravimetric analysis （TG）, and differential thermal analysis （DTA）. The thermal decomposition process of the Y2.3 precursor was investigated. SEM results demonstrated that the as-prepared porous Y2.3 microcubes were with an average width of about 2. μm and thickness of about 8μm. It was found that the morphology of the Y2.3 precursor could be readily tuned by varying the molar ratio of S2.2. to y3＋. Y2.3：Eu3＋（6.6%） microcubes were also prepared and their photoluminescence properties were investigated.

关键词： yttrium oxide yttrium sulfate solvothermal synthesis porous material