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Studies on photo-electro-chemical catalytic degradation of acid scarlet 3R dye

Science China chemistry 2005年第4期48卷 297-304页

作者： LI Mingyu1.XIONG Lin1.CHEN Yunyun2.ZHANG Na1.ZHANG Yuanming2.& YIN Hua1.1.department of {1.al engineering,Jinan university,guangzhou 51.630,China 2.department of chemistry,Jinan university,guangzhou 51.630,China 1. department of {1.al engineering Jinan University 510630 Guangzhou China 2. department of chemistry Jinan University 510630 Guangzhou China

A new type of photo-electro-chemical catalytic reactor was *** and anode of the new reactor were made of high-purity graphite and titanium dioxide electrode re-spectively.A saturated calomel electrode (SCE) was used as the reference *** the condition of ultraviolet radiation and anodic bias-voltage,acid scarlet 3R was degraded by the process of photoelectrocatalysis with titanium dioxide electrode in anodic compartment,while it was degraded by electrogenerated Fenton’s reagent and hydrogen peroxide through reducing dissolved oxygen with graphite electrode in *** new reactor made the best use of photogenerated holes and photogenerated charge on the anode of the new reactor,which achieved the purpose of degrading acid scarlet 3R in the cathodic and anodic compartments simultaneously,i.e.“two electrodes and double effect”.The experimental results showed that,compared with other photoelectrocatalysis reactors (“two electrodes and single effect” reactor),the new reactor has obviously enhanced the degradation of acid scarlet 3R *** the con-centration of the dye being 30 mg·L?1.in water,under the operating conditions that when the inert supporting electrolyte concentration was 0.02.mol·L?1.sodium sulfate,initial solution pH = 3,and cathodic potential ?Ec = 0.66 V,the highest decolorizing efficiency of 92. was accomplished in cathodic compartment,and that of 60% in anodic compartment.

关键词： photo-electro-chemical catalysis, graphite electrode, photoelectrocatalysis, acid scarlet 3R.

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Wavelet fractal character of overlapping signal

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Chinese Science Bulletin 2003年第1期48卷 44-49页

作者： QIU Jianding1.2. ZOU Xiaoyong1. LIANG Ruping1.2. MO Jinyuan1.& CAI Peixiang1.1. School of {1. and chemical engineering, Zhongshan Univer-sity, guangzhou 51.2.5, China 2. {12. of chemical engineering, Pingxiang college, Pingxiang 337055, China Correspondence should be addressed to Mo Jinyuan (e-mail: cesmjy @***) School of {1. and {2. engineering Zhongshan University Guangzhou 510275 China department of {1. {2. Pingxiang College Pingxiang 337055 China

A new method based on the combining of the wavelet theory with the fractal theory and named wavelet fractal peak position method (WFPPM) is introduced to ex-tract the number of the components and the relevant peak positions from overlapping signals in chemistry. The over-lapping signal is first transformed into continuous wavelet transform value of time domain in certain dilation range via continuous wavelet transform (CWT), and then changed into capacity dimensions (Dc). The number of the components and the relevant positions of overlapping peaks can be iden-tified easily according to the change of Dc. An investigation concerning the influence of different dilation ranges on the peak positions extracted by WFPPM is also provided. Stud-ies show that the WFPPM is an efficient tool for extracting the peak positions and identifying the number of peaks from unresolved signals, even when this kind of overlapping is significantly serious. Relative errors of less than 1.0% in peak positions are found when WFPPM is used in the pro- cessing of the cadmium(Ⅱ)-indium(Ⅲ) mixture system. The analytical results demonstrate that the desired peak positions can be extracted conveniently, accurately and rapidly from an unresolved signal via WFPPM. Tremendous developing and applications based on currently reported WFPPM in extracting overlapping signals would be expected in the near future.

关键词：重叠信号化学信号电分析化学分离度小波伸缩尖峰位置

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Applications of functionalized ionic liquids

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Science China chemistry 2006年第5期49卷 385-401页

作者： LI Xuehui1, ZHAO Dongbin2.3, FEI Zhaofu2.& WANG Lefu1 1. department of {1. {2., Guangdong Provincial Laboratory of Green {1. Technology, south China Uni-versity of Technology, guangzhou 510641, China 2. Swiss Federal Institute of Technology, Lausanne, EPFL, CH-1015 Lausanne, Switzerland 3. PKU Green chemistry Center, Beijing National Laboratory for Molecular Sciences, college of chemistry and Molecular {2., Peking {1.}, Beijing 100871, China 1. department of {1. engineering Guangdong Provincial Laboratory of Green Chemical Technology South China University of Technology Guangzhou 510641 China 2. Lausanne EPFL Swiss Federal Institute of Technology CH-1015 Lausanne Switzerland 3. PKU Green chemistry Center Beijing National Laboratory for Molecular Sciences College of Chemistry and Molecular Engineering Peking University Beijing 100871 China

Recent developments of the synthesis and applications of functionalized ionic liquids (including dual-functionalized ionic liquids) have been highlighted in this review. Ionic liquids are at-tracting attention as alternative solvents in green chemistry, but as more functionalized ILs are pre-pared, a greater number of applications in increasingly diverse fields are found.

关键词： ionic liquids functionalized ionic liquids dual-functionallzed ionicliquids reaction media asymmetric synthesis nano-materials porous materials lubricants flue-gas desulfurization oil desul-furization

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Metallomics:An integrated biometal science

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Science China chemistry 2009年第12期52卷 2055-2070页

作者： GE RuiGuang1.2.& SUN HongZhe1.1.department of chemistry and Open Laboratory of {1. Biology,The university of Hong Kong,Hong Kong,China 2.Laboratory of Integrative Biology,college of Life Sciences,Sun Yat-Sen university,guangzhou 51.006,China department of chemistry and Open Laboratory of {1. Biology The University of Hong Kong Hong Kong China Laboratory of Integrative Biology College of Life Sciences Sun Yat-Sen University Guangzhou 510006 China

Metallomics is an emerging scientific area integrating the research fields related to the understanding of the molecular mechanisms of metal-associated life processes and the entirety of metal and metalloid species within a cell or tissue type. In metallomics,metalloproteins,metalloenzymes and other metal-containing biomolecules in a biological system are referred to as metallomes,similar to genomes and proteomes in genomics and proteomics,respectively. This review discusses the concept of metallomics with a focus on analytical techniques and methods,particularly the so-called hyphenated techniques which combine a high-resolution separation technique (gel electrophoresis/laser ablation,chromatography or capillary electrophoresis) with a highly sensitive detection method such as elemental (inductively coupled plasma,ICP) or molecular (electron spray ionization (ESI) or matrix-assisted laser desorption/ionization (MALDI)) mass spectrometry,or nuclear X-ray fluorescence/absorption spectrometry. The applications of these advanced analytical methods in the identification of metallo-/phospho-/seleno-proteins,probing of relationships between structure and function of metal-loproteins,and study of clinically used metallodrugs will be selectively outlined,along with their advantages and limitations.

关键词： metallomics metallome metallodrug metalloprotein chemical speciation

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ELECTRO－OXIDATION　OF　ETHANOL　ON　HIGHLY　PREFERRED　ORIENTATION　NICKEL　ELECTRODE　IN　NaOH

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Chinese chemical Letters 1996年第8期7卷 745-748页

作者： Ling HUANG Shu Kai XU Shao Min ZHOU(department of chemistry, {1., {2.,361.0) xiamen UNIV DEPT CHEMXIAMEN 361005PEOPLES R CHINA

The electro-oxidation of ethanol on a highly preferred orientation (2.0) Ni electrode and alower texture degree Ni electrode in 1.mol/L NaoH was investigated with cyclicvoltammetry. The mechanism of ethanol oxidation on the highly preferred orientation Nielectrode is proposed. It is shown that the current peak of electro-oxidation of ethanol onthe highly preferred orientation (2.0) Ni electrode is much higher than that of the lowertextUre degree (2.0) Ni electrode, Ni(Ⅲ) on the surface of the highly preferredorientation(2.0)Ni electrode is responsible for the oxidation ethanol.

关键词： NaOH NICKEL ORIENTATION PREFERRED ELECTRO ELECTRODE

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Synthesis and Characterization of a Novel pH-sensitive Complex for Drug Release

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Journal of Wuhan university of Technology(Materials Science) 2010年第1期25卷 24-27页

作者：许东颖李光吉 department of Polymer Science and {1. South China University of Technology

A novel pH-sensitive complex was prepared by using oxidized konjac glucomannan and 4-aminosalicylic acid （4-ASA） through glutaraldehyde as a cross-linking agent. The product was characterized by FTIR and 1.C NMR spectra, and the thermogravimetric analysis was also studied. The drug release studies in vitro showed that the amount of 4-ASA released from the complex was about 4%, 56% and 1.% after {2.h at pH 1.2. 6.8 and 7.4, respectively. The data demonstrate that the rate of the drug release of the complex can be more effectively controlled by pH value. The results showed that the novel pH-sensitive complex could be potentially useful for colon-targeting drug delivery system.

关键词： konjac glucomannan pH-sensitivity drug release

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Size and support effects for CO oxidation on supported Pd catalysts

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Science China chemistry 2010年第9期53卷 2047-2056页

作者： WANG ZhaoWen,LI Bin,CHEN MingShu,WENG WeiZheng & WAN HuiLin State Key Laboratory of Physical chemistry of Solid Surfaces National {1. Laboratory for Green {2. Productions of Alcohols-Ethers-Esters department of chemistry,college of chemistry and chemical engineering,xiamen university,xiamen 361.05,China 1. State Key Laboratory of Physical chemistry of Solid Surfaces Xiamen University Xiamen 361005 China2. National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters Xiamen University Xiamen 361005 China3. Department of Chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China

Supporting Pd catalysts characterized significant different size distribution were obtained using PdCl2.[Pd(NH3)4](NO3)2.and Pd(acac)2.as ***-resolution transmission electron microscopy(TEM),X-ray diffraction(XRD),in-situ Fourier transform infrared spectroscopy(FTIR) and Raman spectroscopy were used to examine the dispersion of *** performance measurements show that the activities for CO oxidation increase as the Pd particle size decreases and the O2.CO ratio *** activities under oxygen rich conditions are significantly higher than those at near the stoichiometric *** on TiO2.prepared by the Pd(acac)2.precursor is highly dispersed,leading to a considerable activity for CO oxidation at near room *** oxidation on the 1.wt% Pd/TiO2.and under an O2.CO ratio of 1.characterized an apparent activation energy of 36.7 kJ/mol,which is closed to those reported for CO oxidation on the supported Au *** present work demonstrates a high catalytic activity of highly dispersed noble metals,and suggests a promising approach of using noble metals as catalysts with exceeding high efficiency.

关键词： noble metals supported palladium CO oxidation size effect support effect

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An Ab Initio Study of N_2. Decomposition on MgO Catalyst

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Chinese chemical Letters 1998年第6期9卷 583-586页

作者： Xin LU Xin XU Nan Qin WANG and Qian Er ZHANG(State Key Laboratory for Physical chemistry of Solid Surfaces, Institute of Physical chemistry,{2., xiamen university, xiamen 361.05) xiamen Univ Dept Chem State Key Lab Phys Chem Solid Surfaces Inst Chem Phys Xiamen 361005 Peoples R China

Ab initio calculations based on density functional theory have been used to study thedecompsition of N_2. on MgO. The reaction is predicted to occur on O_3c and O_(4c) atoms, but not onO_(5c) atoms, with an activation barrier of 2.-2. kcal/mol, in agreement with the experimental valueof 35 kcal/mol. Natural bond orbital analysis shows that the reaction leaves O ad-atoms on thosesurface O anions to form a peroxide-like 'O^2.(2.)' species. The )O-O bond stretching frequency ispredicted to be in the range from 82. cm(-1. to 82. cm(-1..

关键词： Ab initio calculation N_2. decomposition MgO catalyst

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Evaluation of non-covalent interaction between Seryl-Histidine dipeptide and cyclophilin A using NMR and molecular modeling

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Science China chemistry 2010年第9期53卷 1987-1993页

作者： LIU Yan1,SHI YanHong2.LIU XiaoXia1,LIN MingKun1,LIN DongHai1,2.& ZHAO YuFen1,3 1Key Laboratory for chemical Biology of Fujian Province,{1. of chemical Biology,department of chemistry,college of chemistry and chemical engineering,xiamen university,xiamen 361.05,China 2.hanghai Institute of Materia Medica,Shanghai Institutes of Biological Sciences,Chinese Academy of Sciences,Shanghai 2.12.3,China 3Key Laboratory for Bioorganic Phosphorus chemistry and chemical Biology,Ministry of Education,department of chemistry,S{1.} of Life Sciences and {1.},Tsinghua {1.},Beijing 100084,China 1. Key Laboratory for chemical Biology of Fujian Province Department of Chemical Biology Department of Chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China2. Shanghai Institute of Materia Medica Shanghai Institutes of Biological Sciences Chinese Academy of Sciences Shanghai 201203 China3. Key Laboratory for Bioorganic Phosphorus Chemistry and Chemical Biology Ministry of Education Department of Chemistry School of Life Sciences and Engineering Tsinghua University Beijing 100084 China

Seryl-Histidine dipeptide(Ser-His) has been previously reported to be capable of cleaving DNAs and carboxyl esters,as well as *** protein cleavage mechanism has not been addressed *** an initial step of protein cleavage activity,the non-covalent binding affinity of Ser-His for proteins is a crucial *** this work,we took cyclophilin A(CyPA) as a substrate protein,and evaluated the non-covalent interaction between CyPA and Ser-His using a combination of NMR spectroscopy and molecular modeling *** independent Ser-His binding sites on CyPA were detected using 1.N-1. heteronuclear single-quantum coherence(HSQC) *** binding site binds one Ser-His *** constants,Kd1.and Kd2.were estimated to be 2.07 and 6.66 mmol/L,respectively,indicative of the weak non-covalent interaction between Ser-His and *** on molecular modeling results,we suggest that both the α-amino and the side chain hydroxyl group of Ser-His are crucial for the non-covalent interaction between Ser-His and *** work sheds light on the molecular mechanism of Ser-His and its analogues cleaving proteins.

关键词： Ser-His cyclophilin A HSQC non-covalent interaction binding sites

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Progress in the development of techniques based on light scattering for single nanoparticle detection

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Science China chemistry 2011年第8期54卷 1244-1253页

作者： ZHU ShaoBin, WANG Shuo, YANG LingLing, HUANG TianXun & YAN XiaoMei department of {1. Biology, {2. Key Laboratory for {1. Biology of Fujian Province Key Laboratory of Analytical Science, xiamen university, xiamen 361.05, China 1. department of {1. Biology College of Chemistry and Chemical Engineering Key Laboratory for chemical Biology of Fujian Province Key Laboratory of Analytical Science Xiamen University Xiamen 361005 China

Nanoparticles have recendy attracted extensive attention in view of their great potential in biomedicine and bioanalytical applications. Single particle detection via light scattering offers a simple and efficient approach for the size, size distribution, and concentration analysis of nanoparticles. In particular, intrinsic heterogeneity or rare events masked by ensemble averaging can be revealed. However, the sixth power dependence of Rayleigh scattering on particle size makes it very challenging to detect individual nanoparficles of small sizes. This article is intended to provide an overview of recent progress in the development of techniques based on light scattering for the detection of single nanoparticles.

关键词： light scattering single particle detection nanoparticles confocal correlation spectroscopy flow cytometry

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