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Hydroalumination of diazo and azido compounds:An Al-H addition to end-on nitrogen of substrates

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Science china chemistry 2010年第9期53卷 1970-1977页

作者： CHU ChenHui1,YANG Ying1,2 & ZHU HongPing1 1state key laboratory of physical chemistry of solid surfaces National Engineering laboratory for Green Chemical Productions of Alcohols-Ethers-Esters College of chemistry and Chemical Engineering,xiamen university,xiamen 361.05,china 2School of chemistry and Chemical Engineering,Central South university,Changsha 410083,china 1. state key laboratory of physical chemistry of solid surfaces National Engineering laboratory for Green Chemical Productions of Alcohols-Ethers-Esters College of chemistry and Chemical Engineering Xiamen University Xiamen 361005 China2. School of Chemistry and Chemical Engineering Central South University Changsha 410083 China

This paper reports the reactions of a monomeric aluminum dihydride LAlH2(L = HC[C(Me)N(Ar)]2,Ar = 2,6-i-Pr2C6H3) with diazo,azido,and terminal alkyne *** reaction of LAlH2 with N2CH(SiMe3) and N3(1-Ad) occurred through an Al-H addition to end-on nitrogen to yield respective compounds LAl[N(H)N = CH(SiMe3)]2(1) and LAl[N(H)N=N(1-Ad)]2(2),while the reaction of LAlH2 with PhC≡CH occurred through a stepwise deprotonation to yield LAlH(C≡CPh)(5) and LAl-(C≡CPh)2(6),respectively.2 further reacted by N2-release to yield LAl[NH(1-Ad)][N(H)N=N(1-Ad)](3) and LAl[NH-(1-Ad)]2(4) upon the increased temperature *** 1-6 have been fully characterized,revealing novel reactivity patterns of LAlH2 toward different substrates under the steric influence from the bulky L ligand at Al.

关键词： hydroalumination bulky aluminum hydride multiple-bond molecule Al–H addition

ELECTROCHEMICAL COPOLYMERIZATION OF ANILINE AND AZURE B

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Chinese Journal of Polymer Science 2001年第5期19卷 483-492页

作者： Dan Shan Shao-lin Mu Bing-wei Mao Yong-fang Li Department of chemistry School of Science, Yangzhou university Yangzhou 225002, china state key laboratory of physical chemistry of solid Surface, xiamen university xiamen 361.05 china Center for Molecular Science. Institute of chemistry Chinese Academy of Sciences, Beijing 100080 china Yangzhou Univ Sch Sci Dept Chem Yangzhou 225002 Peoples R China xiamen Univ State Key Lab Phys Chem Solid Surface Xiamen 361005 Peoples R China Chinese Acad Sci Inst Chem Ctr Mol Sci Beijing 100080 Peoples R China

The electrochemical copolymerization of aniline and N,N,N'-trimethylthionin (azure B) in aqueous solutions has been carried out using the potential sweep method. The optimum conditions for the coelectrodeposition are that the pH value and the temperature of the electrolytic solution are controlled at 5.57 and 30 degreesC, respectively, and the scan potential range is set between -0.25 and 1.10 V (versus SCE). The copolymerization rate of aniline and azure B is about 3 times larger than that of aniline in the absence of azure B. The copolymerization of aniline and azure B was verified from the results of visible spectra during electrolysis, FTIR spectra and the atomic force microscopy (AFM) images of the polymers. The in situ visible spectrum for the electrolysis of the solution containing aniline and azure B is different from that of the respective aniline and azure B. The FTIR spectrum of the copolymer is not a superposition of that of polyaniline and poly(azure B). The AFM image of the copolymer is different from those of polyaniline and poly(azure B) and is not a mixture of individual polymers. The conductivity of the copolymer synthesized at pH 5.57 is four orders of magnitude higher than that of polyaniline synthesized under the same conditions, but in the absence of azure B. The electrochemical properties of the copolymer are mainly attributed to polyaniline, but the copolymer has a better electrochemical reversibility and a much faster charge transfer than those of polyaniline.

关键词： aniline azure B electrochemical copolymerization characterization of copolymer electrochemical property

SERS CHARACTERIZATION OF ADSORBED WATER AT VERY NEGATIVE POTENTIALS

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Chinese Chemical Letters 1993年第7期4卷 625-626页

作者： Zhong Qun TIAN Bing Wei MAO state key laboratory for physical chemistry of the solid Surface, Department of chemistry, xiamen university, xiamen 361.05

Surface enhanced Raman scattering of water adsorbed at silver electrodes in very negative potential region was first observed and a simple model related to the adsorption configuration is proposed.

关键词： SERS CHARACTERIZATION OF ADSORBED WATER AT VERY NEGATIVE POTENTIALS very SCE mode AT

CLUSTER SIMULATIONS:THEORETICAL STUDIES OF NiO AND CO CHEMISORPTION

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Journal of Energy chemistry 1995年第4期 353-364页

作者： XU Xin LU Xin WANG Nan-Qin ZHANG Qian-Erstate key laboratory of physical chemistry on solid surfaces Department of chemistry, xiamen university xiamen, Fujian 361.05

The bonding of CO to the NiO(100)surtace has been investigated by means of DV-Xa method Emphasis is on how to get a realistic description of the NiO bulk as well as the bonding mechanism in *** calcuation results demonstrate that it is very important to maintain the charge consistency so as to reproduce the experimental results of bulk NiO with an embedded cluster model When compared with the bonding mechanism of CO in a surface electric field,the embedded cluster calculations with BSSE correction show that the interaction between CO and NiO(100)is mainly electrostatic.

关键词： CO/NiO chemisorption cluster model charge consistency

Study on interaction between macrocell and microcell in the early corrosion process of reinforcing steel in concrete

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Science china(Technological Sciences) 2010年第5期53卷 1285-1289页

作者： LI LanQiang1,DONG ShiGang1,WANG Wei2,HU RongGang1,DU RongGui1,LIN ChangJian1,ZHUO XiangDong1 & WANG Jia2 1 state key laboratory of physical chemistry of solid surfaces,Department of chemistry,College of chemistry and Chemical Engineering,xiamen university,xiamen 361.05,china 2 College of chemistry and Chemical Engineering,Ocean university of china,Qingdao 266100,china 1. state key laboratory of physical chemistry of solid surfaces Department of Chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China2. College of Chemistry and Chemical Engineering Ocean University of China Qingdao 266100 China

An array electrode technique was developed as a novel electrochemical method for studying the interaction between macrocell and microcell in the early corrosion process of reinforcing steel in cement *** corrosion potential and galvanic current of macrocell corrosion of the reinforcing steel in cement mortar were imaged by the array electrode technique during the corrosion initiation and *** was certified that the corrosion macrocell current is closely related with the difference of corrosion potential between the anodic and cathodic *** corrosion macrocell and microcell always exist during the corrosion *** interaction of corrosion macrocell and corrosion microcell of steel in concrete was directly sensed by the array electrode for the first time,and was discussed in terms of corrosion electrochemistry.

关键词： reinforcing steel in concrete array electrode macrocell microcell

Properties and characterization of Au^(3+)-adsorption by mycelial waste of Streptomyces aureofaciences

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Chinese Science Bulletin 2001年第20期46卷 1709-1712页

作者： LIU Yueying, FU Jinkun, HU Hongbo, TANG Dingliang, Nl Zimian & YU Xinsheng1. Department of Biology, 2. state key laboratory for physical chemistry of solid Surface, 3. Center for Analysis & Testing, xiamen university, xiamen 361.05, china Department of Biology Xiamen University Xiamen China state key laboratory for physical chemistry of solid Surface Xiamen University Xiamen China Center for Analysis & Testing Xiamen University Xiamen China

Mycelial waste of Streptomyces aureofaciences procured from the aureomycin fermentation industry is used as biosorbent for Au3+. The properties of Au3+ adsorption by the mycelial waste are studied. The results indicate that the optimum pH value of Au3+ adsorption is 3.5. The biosorption is a rapid and non-temperature-dependent process. The bio-sorptive capacity with 45.6 mg/g and efficiency with 91.2% are achieved under the conditions of pH 3.5 and 30℃ for 45 min, in which the ratio is 50 mg/g dry weight for the concentrations of initial Au3+ and the mycelial waste. The Au3+ ions adsorbed on the mycelial waste can be eluted. The observation in a transmission electron microscope shows that the Au3+ ions can be reduced to Au particles by the mycelial waste and the Au can become gold crystals with differentforms and sizes. X-ray photoelectron spectroscopy analysis further proves that the Au3+ can be reduced to Au0 by the mycelial waste.

关键词： Streptomyces aureofaciences mycelial waste gold bio-sorption gold crystal characterization.

Adsorption and reduction of palladium (Pd^(2+)) by Bacillus licheniformis R08

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Chinese Science Bulletin 2002年第15期47卷 1262-1266页

作者： LIN Zhongyu, ZHOU Chaohui, WU Jianming, CHENG Hu, LIU Bilan, Nl Zimian, ZHOU Jianzhang & FU Jinkunstate key laboratory for physical chemistry of solid Surface, Department of chemistry, xiamen university, xiamen 361.05, china state key laboratory for physical chemistry of solid Surface Department of Chemistry Xiamen University Xiamen China

Preliminary study on the mechanism of Pd2+ biosorption by resting cells of Bacillus licheniformis R08 biomass has been carried out by means of chemical kinetics and AAS, TEM, XRD and FTIR methods. The results showed that at 30°C and pH 3.5, when dry R08 biomass powder (800 mg/L) was mixed with Pd2+ (100 mg/L) for 45 min, the rate constant k of biosorption of Pd2+ attained a maximum of 5.97×10-2 min-1 and the half life period of the reaction reached 12 min. The part of Pd2+ adsorbed by R08 biomass was reduced to elemental, cell-bound Pd0 at the same condition. The cell wall of R08 biomass was the primary location for accumulating Pd2+, and aldoses, i. e. hy-drolysate of a part of polysaccharides on the peptidoglycan layer in the acidic medium, serving as the electron donor, in situ reduced the Pd2+ to Pd0.

关键词： Bacillus licheniformis biosorption palladium non-en-zymatically mediated bioreduction FTIR.

A COMBINED MEASUREMENT SYSTEM FOR UV/V IN SITU SPECTROELECTROCHEMICAL STUDY

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Chinese Chemical Letters 1991年第4期2卷 309-312页

作者： Jin LUO Zhong Hua LIN Zhao Wu TIAN (state key laboratory for physical chemistry of the solid Surface,xiamen university,xiamen,361.05)

A microcomputer-based UV/V in situ spectroelectrochemical measurement system has been *** paper presents a description of the experimental details regarding the methods and equipment.

关键词： UV A COMBINED MEASUREMENT SYSTEM FOR UV/V IN SITU SPECTROELECTROCHEMICAL STUDY

STUDY OF Pt-Ce/ KL AND Pt/ Ce KL ZEOLITE REFORMING CATAL YSTS

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Chinese Journal of Catalysis 1996年第5期 70-73页

作者： Lu Weiqi, Li Fengyi (Institute of Applied chemistry, Nanchang university, Nanchang 330047) Long Ruiqiang, Wan Huilin (state key laboratory for physical chemistry of solid Surface, xiamen university, xiamen 361.05)

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关键词： Zeolite KL Platinum Cerium Reforming catalyst