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In-situ Microscopic FTIR Spectroelectrochemical Study of the Reduction of K_(3)Fe(CN)_(6) in Polymer Electrolyte

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Chemical Research in Chinese Universities 1998年第3期14卷 42-47页

作者： GUO Li ping LIN xiang qin Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChangchun130022

Cyclic voltammetry and in situ microscopic FTIR spectroelectrochemistry were used for the electrochemical and vibrational characterizations of the reduction process of K 3Fe(CN) 6 in polyethylene glycol(PEG) with LiClO 4 as supporting electrolyte at a Pt microelectrode. The rate of electron transfer is a function of the concentration of the supporting electrolyte. The redox potentials and cyclic voltammetric currents vary with Li/O molar ratio. The in situ spectroelectrochemistry shows that the infrared spectra are influenced by the concentration of LiClO 4. The bridging cyanide groups with a structure Fe Ⅱ—C≡N…Fe Ⅱ—C≡N are formed during the reduction process of K 3Fe(CN) 6. There may be an activated complex between the Li + cation and the complex anion.

关键词： FTIR Spectroelectrochemistry MFTIRS K 3Fe(CN) 6 Polymer electrolyte

In-Situ Microscopic FTIR Spectroelectrochemistry of Ascorbic Acid in Poly(ethylene glycol)/LiClO_4 Electrolyte Paste and in the Presence of Dispersed Cobalt Hexacyanoferrate Microcrystalline Powder

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Chemical Research in Chinese Universities 1999年第1期15卷 12-18页

作者： GUO Li-ping LIN xiang-qin Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022 Department of Chemistry University of Science and Technology of ChinaHefei230026

In-situ microscopic FTIR spectroelectrochemical technique(MFTIRs) was applied to studying the electrochemical oxidation of ascorbic acid(AA) in poly(ethylene glycol)(PEG) paste at a 100 μm diameter Pt disk electrode. Using this technique, the catalytic ability of cobalt hexacyanoferrate(CoHCF) microcrystalline toward AA oxidation was also studied. It was found that the dispersed CoHCF powder in the PEG paste can generate well shaped thin layer cyclic voltammetric waves with the peak height proportional to the scan rate, corresponding to the Fe centered redox reactions. This oxidation step catalyzed the AA oxidation. Also, this pasted CoHCF powder generated well resolved in situ MFTIRs spectra, by which a chemical interaction between CC bond of AA ring and CoHCF lattice was revealed. A corresponding surface docking mechanism for the catalytic reaction has been proposed.

关键词： In situ MFTIRs Ascorbic acid Cobalt hexacyanoferrate Polymer electrolyte Microcrystalline Docking mechanism

A V-shaped spectroscopic cell for FTIR measurements

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Chinese Chemical Letters 2011年第4期22卷 481-484页

作者： xiang qin Lin Zhi xiang Zhang Wan Qun Hu Department of Chemistry University of Science and Technology of China Hefei 230026 China

A V-shaped spacroscopic cell（V-cell） was constructed using two CaF2 optical plates for FTIR light transparent measurements in the range of 4000-1000 cm^（-1）.The spectrum of ethanol was characterized with the standard spectra,excellent fitting was achieved with a bottom-width correction *** principle of the V-cell was discussed,giving equations for the data *** shows that the V-cell is an auto-focus type spectroscopic cell,which can effectively avoid absorption saturation with amplifications for weak absorption *** V-cell design is simple and effective,easy to operate,suitable for applications in liquid samples with high absorption bands,willing to have broad application prospects.

关键词： V-shaped cell FTIR spectroscopy Light transparent Error correction Demountable Ethanol

Intercalation of Epinephrine with Calf-thymus ds-DNA

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Chinese Chemical Letters 2001年第7期12卷 619-622页

作者： Sai Jing ZHENG xiang qin LIN Department of Chemistry University of Science and Technology of ChinaHefei 230026

A strong interaction between double stranded calf-thymus DNA (ds-DNA) and epinephrine but no interaction between single stranded calf-thymus DNA (ss-DNA) and epinephrine were observed by the use of UV-spectroscopy and cyclic voltammetry. It is suggested that the interaction leads to an intercalation of EP molecules into the groove of ds-DNA and the formation of ds-DNA(EP)(n) complex.

关键词： DNA epinephrine UV-visible spectroscopy cyclic voltammetry

Ultrafast cyclic voltammetry with asymmetrical potential scan

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Chinese Chemical Letters 2008年第1期19卷 85-88页

作者： Zhi Yong Guo xiang qin Lin Faculty of Materials Science and Chemical Engineering The State Key Laboratory Base of Novel Functional Materials and Preparation Science Ningbo University Ningbo 315211 China Department of Chemistry University of Science and Technology of China Hefei 230026 China

Based on the perfect ohmic drop compensation by online electronic positive feedback, ultrafast cyclic voltammetry with asymmetrical potential scan is achieved for the first time, with the reduction of anthracene acting as the test system. Compared with the traditional cyclic voltammetry utilizing symmetrical triangular waveform as the excitation one, the new method allows a simpler approach to mechanistic analysis of ultrafast chemical reactions coupled with a charge transfer. And perhaps more important, it also provides a way to eliminate the interference of the adsorbed product in dynamic monitoring. 2007 Zhi Yong Guo. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.

关键词： Ultrafast cyclic voltammetry Asymmetrical potential scan MV/s scan rates

The In-cell iR Compensation Using a Four-electrode System

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Chinese Chemical Letters 2006年第5期17卷 703-706页

作者： xiang qin LIN Liang Dong FENG University of Science and Technology of China Hefei 230026

A novel idea of in-cell iR compensation was proposed by using a four-electrode electrochemical system, which was consisted of two working electrodes, one reference electrode （RE） and one auxiliary electrode （AE）. One of the two working electrodes was called the auxiliary working electrode （AWE）, which was directly connected to the ground. Another working electrode was used as a regular working electrode （WE） for electrochemical testing. The reference electrode was set in a frit close to the AWE for potential sampling. The other electrodes, WE, RE and AE, were connected to a conventional potentiostat of three-electrode system for electrochemical measurements. A linear narrow electrochemical cell was designed for setting AE at one end and AWE with RE at another end, and setting WE in between AE and AWE. In this way, a positive feedback potential was generated at the working electrode from the solution resistance and the current flow in the solution. An formal iR compensation over 100%, as high as 500%, had been achieved without potential oscillation. The electrochemical cell design, the principle of the in-cell iR compensation, and the preliminary voltammetric characterization by using the redox reaction of ferrocyanide anions were reported.

关键词： In-cell iR compensation four-electrode system cell design cyclic voltammetry.

A glass nanopore electrode for single molecule detection

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Chinese Chemical Letters 2010年第9期21卷 1115-1118页

作者： Guo Xia Li xiang qin Lin Department of Chemistry University of Science and Technology of ChinaHefei 230026China

We have developed a simple method for fabricating robust and low noise glass nanopore electrodes with pore size 10±5 nm to detect single molecules.β-Cyclodextrin was used as model compound for *** 1.0 mol/L NaCl solution,the molecules generated current pulses of 2-5 pA with noise level less than 0.8 pA.A slide mode and a plug mode were suggested for the way ofβ-cyclodextrin single molecule moving into the glass nanopores.

关键词： Glass nanopores Single molecule detecting β-Cyclodextrin

Pressure and Temperature Feasibility of NCEP/NCAR Reanalysis Data at ***

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Journal of Mountain Science 2008年第1期5卷 32-37页

作者： XIE Aihong REN Jiawen qin xiang KANG Shikang State Key Laboratory of Cryospheric Sciences Cold and Arid Regions Environment and Engineering Research Institute Chinese Academy of Sciences Lanzhou 730000 China Institute of Tibetan Plateau Research Chinese Academy of Sciences Beijing 100085 China

*** (27°54' N,86°54' E),the highest peak,is often referred to as the earth's 'third' pole,at an elevation of 8844.43 m. Due to the difficult logistics in the extreme high elevation regions over the Himalayas,observational meteorological data are very few on Mt. Everest. In 2005,an automatic weather station was operated at the East Rongbuk glacier Col of Mt. Everest over the Himalayas. The observational data have been compared with the reanalysis data from the National Centers for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR),and the reliability of NCEP/NCAR reanalysis data has been investigated in the Himalayan region,after the reanalyzed data were interpolated in the horizontal to the location of Mt. Everest and in the vertical to the height of the observed sites. The reanalysis data can capture much of the synoptic-scale variability in temperature and pressure,although the reanalysis values are systematically lower than the observation. Furthermore,most of the variability magnitude is,to some degree,underestimated. In addition,the variation extracted from the NCEP/NCAR reanalyzed pressure and temperature prominently appears one-day lead to that from the observational data,which is more important from the standpoint of improving the safety of climbers who attempt to climb Mt. Everest peak.

关键词： NCEP/NCAR daily averaged pressure daily minimum temperature high Himalayas Mt.Everest

In-situ Microscopic FT-IR Spectroelectrochemical Investigation of Polythiophene Film Modified Electrode

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Chemical Research in Chinese Universities 2001年第1期17卷 26-30页

作者： JIANG Jun-guang ZHANG Hong-qiang LIN xiang-qin Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022P.R.China Department of Chemistry University of Science and Technology of ChinaHefei 230026P.R.China

A polythiophene film was electrochemically deposited on a Pt micro plate electrode and investigated by cyclic voltammetry and in situ reflection microscopic FTIR spectroscopy. The FTIR analysis showed that the electropolymerization of thiophene on the Pt surface was affected by the surface adsorption processes of thiophene molecules. Two adsorption modes were identified. Two structure models of the polythiophene chain were observed simultaneously. It was proposed that the good conductibility of the polythiophene film was originated from a co vibratory equilibrium of the link part of model Ⅰ and model Ⅱ.

关键词： FTIR spectroelectrochemistry Polythiophene film Microscopy Microelectrode