摘要：
A polymer electrolyte based on poly（vinylidene） fluoride-hexafluoropropylene was prepared by evaporating the solvent of dimethyl formamide, and non-woven fabric was used to reinforce the mechanical strength of polymer electrolyte and maintain a good interfacial property between the polymer electrolyte and electrodes. Polymer lithium batteries were assembled by using LiCoO2 as cathode material and lithium foil as anode material. Scanning electron microscopy, alternating current impedance, linear sweep voltammetry and charge-discharge tests were used to study the properties of polymer membrane and polymer Li-ion batteries. The results show that the technics of preparing polymer electrolyte by directly evaporating solvent is simple. The polymer membrane has rich micro-porous structure on both sides and exhibits 280% uptake of electrolyte solution. The electrochemical stability window of this polymer electrolyte is about 5.5 V, and its ionic conductivity at room temperature reaches 0.151 S/m. The polymer lithium battery displays an initial discharge capacity of 138 mA·h/g and discharge plateau of about 3.9 V at 0.2 current rate. After 30 cycles, its loss of discharge capacity is only 2%. When the battery discharges at 0.5 current rate, the voltage plateau is still 3.7 V. The discharge capacities of 0.5 and 1.0 current rates are 96% and 93% of that of 0.1 current rate, respectively.
作者机构：
[兰正刚; 李国辉; 李晓如] School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China;[李国辉] Department of Chemistry, Hunan City College, Yiyang 413000, China
通讯机构：
School of Chemistry and Chemical Engineering, Central South University, China
作者机构：
[袁艳; 胡拥军; 石西昌; 徐徽; 陈白珍] School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China;[胡拥军] Department of Chemistry, Hunan City University, Yiyang 413049, China
通讯机构：
School of Metallurgical Science and Engineering, Central South University, China
作者机构：
[Luo, Xinxiang; Wen, Ruiming] Department of Chemistry and Environmental Engineering, Hunan City University, Yiyang Hunan, China;[Qu, Fanqi; Huang, Xiaoling] College of Chemistry and Molecular Sciences, Wuhan University, Wuhan Hubei, China
通讯机构：
Department of Chemistry and Environmental Engineering, Hunan City University, China
摘要：
Four novel bridged dianilines containing fluorine were synthesized using 4-chloro-3, 5-dinitrobenzotrifluoride and diamine by two step condensation and reduction. The structures of corresponding compounds were determined by means of IR, NMR and elemental analysis.
作者机构：
Department of Chemistry and Environment Engineering, Hunan City University, Yiyang 413000, China;[李小军; 余庆波; 周根余] Genetics Laboratory, Department of Biology, Shanghai Normal University, Shanghai 200234, China;[刘石泉] Department of Chemistry and Environment Engineering, Hunan City University, Yiyang 413000, China, Genetics Laboratory, Department of Biology, Shanghai Normal University, Shanghai 200234, China
通讯机构：
[Zhou, G.-Y.] G;Genetics Laboratory, Department of Biology, Shanghai Normal University, China
作者机构：
[袁艳; 胡拥军; 陈白珍; 李义兵] School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China;[胡拥军] Department of Chemistry, Hunan City University, Yiyang 413049, China
通讯机构：
[Hu, Y.-J.] S;School of Metallurgical Science and Engineering, Central South University, China
作者机构：
[罗一鸣; 刘长辉; 唐瑞仁] School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China;[杨华武] The Technology Center, Changsha Cigarette Factory, Changsha 410014, China;[刘长辉] Department of Chemistry and Environmental Engineering, Hunan City University, Yiyang 413029, China
通讯机构：
School of Chemistry and Chemical Engineering, Central South University, China
摘要：
The title compound, C40H36O5, was synthesized from p-anisaldehyde and acetophenone. The central six-membered ring adopts a chair conformation and most of the bulky side groups are located in equatorial positions. The hydroxyl group is involved in weak intra- and intermolecular hydrogen bonding.
摘要：
In the crystal structure of the title compound, C15H12Cl2O2, the chloro-substituted benzene rings are not parallel; the other rings are nearly parallel and the molecules stack in layers parallel to these rings. There are two molecules in the asymmetric unit.
摘要：
Acetophenone reacted with a series of aromatic aldehydes with grinding under catalysis of a double-component solid base system consisting of NaOH and K2CO3 to furnish highly chemoselectively 1,2,3,4,5-pentasubstituted cyclohexanols in 80-95% yield, and their composition and structure are identified by spectral technologies and single crystal X-ray diffraction analysis, and a possible mechanism of the formation was suggested. (c) 2006 Elsevier Ltd. All rights reserved.
作者机构：
[付时雨] State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China;[周攀登] Department of Chemistry and Environment Engineering, Hunan City University, Yiyang 413000, China
通讯机构：
[Fu, S.] S;State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, China
摘要：
A novel approach to assemble an H2O2 amperometric biosensor was introduced. The biosensor was constructed by entrapping horseradish peroxidase (HRP) labeled nano‐scaled particulate gold (nano‐Au) (HRP‐nano‐Au electrostatic composite) in a new silica sol‐gel/alginate hybrid film using glassy carbon electrode as based electrode. This suggested strategy fully merged the merits of sol‐gel derived inorganic‐organic composite film and the nano‐Au intermediator. The silica sol‐gel/alginate hybrid material can improve the properties of conventional sol‐gel material and effectively prevent cracking of film. The entrapment of HRP in the form of HRP‐nano‐Au can not only factually prevent the leaking of enzyme out of the film but also provide a favorable microenvironment for HRP. With hydroquinone as an electron mediator, the proposed HRP electrode exhibited good catalytic activity for the reduction of H2O2. The parameters affecting both the qualities of sol‐gel/alginate hybrid film and the biosensor response were optimized. The biosensor exhibited high sensitivity of 0.40 Al mol−1 cm−2 for H2O2 over a wide linear range of concentration from 1.22×10−5 to 1.46×10−3 mol L−1, rapid response of <5 s and a detection limit of 0.61×10−6 mol L−1. The enzyme electrode has remarkable stability and retained 86% of its initial activity after 45 days of storage in 0.1 mol L−1 Tris‐HCl buffer solutions at pH 7.
摘要：
A new strategy for constructing the capacitance immunosensor was developed based on gold nanoparticles, which were employed as the platform to immobilize immunospecies. Gold nanoparticles were fixed on the gold electrode, on which the oligomer layer of o-aminobenzenthiol was pre-formed via electrochemical polymerization. An interesting immunospecies was loaded on gold nanoparticles to complete the fabrication of capacitance immunosensor. The changes in morphology of the gold electrode during the experiments were revealed by atomic force microscopy (AFM). The properties of the gold electrode were investigated by cyclic voltammetry, in the presence of an electro-active species as indictor. Also, potentiostatic pulse technique was used in order to evidence the changes of electrode capacitance. The feasibility of the proposed capacitive immunosensor was evaluated for a non-competitive heterogeneous immunoassay of transferrin. The assay covers a relatively large dynamic range of 0.125–100 ng/ml transferrin with a detection limit of 80 pg/ml and a relative high signal-to-noise ratio.
