Bibliographic Information Self-gelatinizable copolymer immobilized glucose biosensor based on prussian blue modified graphite electrode

Bibliographic Information
Study on the diffusion of electroactive molecules in polymer electrolyte by microelectrode voltammetry. Ding, Liming; Dong, Shaojun; Wang, Erkang. Lab. Electroanal. Chem., Chinese Acad. Sci., Changchun, USA. Dianhuaxue (1997), 3(3), 233-240. CODEN: DIANFX ISSN: 1006-3471. Journal; General Review written in Chinese. CAN 127:323783 AN 1997:651745 CAPLUS (Copyright 2001 ACS)
Abstract
A review with 52 refs. is given. The ten years study on the diffusion of electroactive mols. in polymer electrolyte by microelectrode voltammetry was reviewed by considering the development background of polymer electrolyte materials. The classification, fabrication, applications and electrochem. measurements of microelectrode were introduced concisely. The several important factors influencing the diffusion of electroactive mols. were stressed. In the final part of this paper, some new reports on the diffusion of labeled mols. were introduced.
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Probe beam deflection spectroelectrochemistry. Liu, Changwei; Cheng, Guangjin; Dong, Shaojun. Lab. Electroanalytical Chem., Chinese Acad. Sci., Changchun, Peop. Rep. China. Fenxi Huaxue (1997), 25(9), 1090-1097. CODEN: FHHHDT ISSN: 0253-3820. Journal; General Review written in Chinese. CAN 127:323780 AN 1997:637581 CAPLUS (Copyright 2001 ACS)
Abstract
A review with 56 refs. is presented on in-situ probe beam deflection spectroelectrochem. technique, which is a powerful tool for studying concn. gradient of electrode/electrolyte interface. The exptl. setup, deflection theory, influence factors and the application to electrochem. are discussed.
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Hydrazines probe of interaction of horseradish peroxidase with cryo-hydrogel. Zhu, Yimin; Zhang, Jingzhong; Dong, Shaojun. Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Peop. Rep. China. Anal. Chim. Acta (1997), 353(1), 45-52. CODEN: ACACAM ISSN: 0003-2670. Journal written in English. CAN 127:356472 AN 1997:636446 CAPLUS (Copyright 2001 ACS)
Abstract
The interaction between horseradish peroxidase (HRP) and the cryo-hydrogel was probed by using hydrazines which show high specificity of the reaction of the edge in the prosthetic heme of horseradish peroxidase. For comparison, the interaction of hydrazine with the horseradish peroxidase adsorbed on graphite electrode was also carried out by using steady-state response of the enzyme electrode and cyclic voltammetry. In order to obtain a proper explanation of the kinetic parameters for the enzymic reaction, the theor. expressions of Imax and KM' in the Michaelis-Menten equation for the exptl. system were provided.
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Electrochemical study of the self-exchange between viologen-thiol self-assembled monolayers and alkanethiol on gold electrodes. Li, Jinghong; Cheng, Guangjin; Dong, Shaojun. Lab. of Electroanalytical Chem., Acad. Sinica, Changchun Inst. of Applied Chem., Changchun, Peop. Rep. China. Wuli Huaxue Xuebao (1997), 13(7), 655-658. CODEN: WHXUEU ISSN: 1000-6818. Journal written in Chinese. CAN 127:269393 AN 1997:554020 CAPLUS (Copyright 2001 ACS)
Abstract
The prepn. and cyclic voltammetric behaviors of self assembled monolayers (SAMs) contg. electroactive viologen group have been investigated. Treatment of this viologen SAM with solns. of alkanethiols results in replacing the electroactive thiol, shifting neg. its formal potentials and decreasing its heterogeneous electron transfer consts. along with the immersion time. The aim of the work is to understand the exchange regularity of the mixed SAMs on gold electrode surface.
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A novel method of electrodepositing highly dispersed nano palladium particles on glassy carbon electrode. Li, Fenglei; Zhang, Bailin; Dong, Shaojun; Wang, Erkang. Lab. of Electroanal. Chem., Changchun Inst. of Appl. Chem., Chinese Acad. of Sci., Jilin, Peop. Rep. China. Electrochim. Acta (1997), 42(16), 2563-2568. CODEN: ELCAAV ISSN: 0013-4686. Journal written in English. CAN 127:182359 AN 1997:426722 CAPLUS (Copyright 2001 ACS)
Abstract
The volumetric behavior of a chloride complex of Pd was studied at a glassy carbon electrode (GCE). The Pd(IV) complex existing on the GCE surface was found, which was proposed to form an octahedral surface complex through coordination to the O atom of an O functional group on the pretreated GCE surface. The ferricyanide/ferrocyanide redox couple was used as a probe to examine the activity of the GCE. XPS provided the evidence of the surface complex existing on the GCE. Highly dispersed Pd particles can be obtained when the surface complexes are reduced electrochem. to Pd atoms. The Pd particles obtained in this way are nanometer in size and exhibit high catalytic activity towards the oxidn. of hydrazine.
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Preparation of a heteropoly compound-polypyrrole film modified electrode and its electrochemical properties. Wang, Weiqing; Zhang, Xiumei; Cheng, Long; Liu, Baifeng; Dong. Shaojun. Dep. Chem. Eng., Harbin Engineering University, Harbin, Peop. Rep. China. Dianhuaxue (1996), 2(4), 397-401. CODEN: DIANFX ISSN: 1006-3471. Journal written in Chinese. CAN 127:127863 AN 1997:407868 CAPLUS (Copyright 2001 ACS)
Abstract
Electronically conducting polypyrrole doped with heteropolyanions of K10H3[Nd(SiMo7W4)2].xH2O (denoted as [Nd(SiMo7W4)2]13-) was synthesized by electrochem. polymn. This modified electrode maintains the electrochem. and electrocatalytic properties of the heteropolyanion, with resulting good stability and electrocatalytic activity in the redn. of nitric oxide in acidic aq. soln.
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Electrochemical behavior of isoalloxazine confined in a montmorillonite clay-modified electrode. Wu, Zhibin; Lin, Yuan; Zhang, Daodao; Wu, Haoqin; Dong, Shaojun. Department of Chemistry, Fudan Univ., Shanghai, Peop. Rep. China. Dianhuaxue (1997), 3(1), 40-44. CODEN: DIANFX ISSN: 1006-3471. Journal written in Chinese. CAN 127:127862 AN 1997:407790 CAPLUS (Copyright 2001 ACS)
Abstract
A cyclic voltammetric investigation of the stability and redox properties of isoalloxazine on a cetyl trimethylammonium bromide (CTAB)-modified montmorillonite clay-Pt electrode in aq. soln. was performed. The pH-dependent film concns. and apparent diffusion coeffs. were measured. The mechanism of the charge transport process within the clay film is discussed.
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Formation of Surface Inclusion Complexes between Cyclodextrins and n-Alkanethiols and Their Self-Assembled Behaviors on Gold. Yan, Juchao; Dong, Shaojun. Laboratory of Electroanalytical Chemistry Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Peop. Rep. China. Langmuir (1997), 13(12), 3251-3255. CODEN: LANGD5 ISSN: 0743-7463. Journal written in English. CAN 127:40385 AN 1997:380737 CAPLUS (Copyright 2001 ACS)
Abstract
The prepn. of self-assembled monolayers from preformed inclusion complexes of cyclodextrins and thiols on Au electrodes is described. The complexes were studied by 1H-NMR and XPS, and the blocking effects to reactions of the Au substrates by cyclic voltammetry.
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Liquid chromatography-amperometric detection of nitrite using a polypyrrole modified glassy carbon electrode doped with tungstodiphosphate anion. Liu, Zhiming; Xi, Xiaodan; Dong, Shaojun; Wang, Erkang. Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, Peop. Rep. China. Anal. Chim. Acta (1997), 345(1-3), 147-153. CODEN: ACACAM ISSN: 0003-2670. Journal written in English. CAN 127:94237 AN 1997:360385 CAPLUS (Copyright 2001 ACS)
Abstract
Chromatog.-amperometric detection of nitrite with a polypyrrole modified glassy carbon electrode doped with tungstodiphosphate anion (Dawson-type P2W18O6-62/PPy/GC electrode) based on its electrocatalytic redn. of nitrite is described. The cyclic and hydrodynamic voltammetry of nitrite at the P2W18O6-62/PPy/GC electrode was studied. The factors affecting the detection of nitrite and the anal. performance of the modified electrode in flowing stream were investigated. The results show that the modified electrode has a good sensitivity (the limit of detection is 1m moldm-3) and a satisfactory reproducibility (RSD = 3.78%, N = 21). The modified electrode was used in the chromatog. detection of nitrite spiked in the liq. from a tin of mushrooms and the mineralized spring water. It was found that the modified electrode exhibited good selectivity for nitrite.
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Self-assembled monolayers of thiols on gold electrodes for bioelectrochemistry and biosensors. Dong, Shaojun; Li, Jinghong. Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Peop. Rep. China. Bioelectrochem. Bioenerg. (1997), 42(1), 7-13. CODEN: BEBEBP ISSN: 0302-4598. Journal written in English. CAN 127:106129 AN 1997:358064 CAPLUS (Copyright 2001 ACS)
Abstract
Monolayers of biol. compds. including redox proteins and enzymes, and phospholipids have been immobilized on a gold electrode surface through self-assembling. These proteins and enzymes, such as cytochrome c, cytochrome c oxidase and horseradish peroxidase (HRP), immobilized covalently to the self-assembled monolayers (SAMs) of 3-mercaptopropionic acid on a gold electrode, communicate directly electrons with the electrode surface without mediators and keep their physiol. activities. The electron transfer of HRP with the gold electrode can also be mediated by the alkanethiol SAMs with electroactive group viologens on the gold electrode surface. All these direct electrochemistries of proteins and enzymes might offer an opportunity to build a third generation of biosensors without mediators for analytes, such as H2O2, glucose and cholesterol. Monensin and valinomycin have been incorporated into the bilayers on the gold electrode consisting of the SAMs of alkanethiol and a lipid monolayer, which have high selectivity for monovalent ions, and the resulting Na+ or K+ sensor has a wide linear range and high stability. These self-assembly systems provide a good mimetic model for studying the physiol. function of a membrane and its assocd. enzyme.
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Ionic conductivity of solid polymer electrolytes based on modified alternating maleic anhydride copolymer with oligo(oxyethylene) side chains. Ding, Liming; Shi, Jing; Yang, Chengzong; Dong, Shaojun. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Peop. Rep. China. Polym. J. (Tokyo) (1997), 29(5), 410-416. CODEN: POLJB8 ISSN: 0032-3896. Journal written in English. CAN 127:34845 AN 1997:345769 CAPLUS (Copyright 2001 ACS)
Abstract
Comb-like polymers (CP) based on modified alternating Me vinyl ether/maleic anhydride copolymer with oligo-oxyethylene side chains of the type-O(CH2CH2O)nCH3 were synthesized and characterized, and complexed with lithium salts [LiClO4, LiCF3SO3] to form amorphous polymer electrolytes. The CP/salt complexes showed cond. up to 10-5 S/cm at room temp., as solid electrolyte films. The temp. dependence of ionic cond. suggests that the ion transport is controlled by segmental motion of the polymer, shown by linear curves obtained in Vogel-Tammann-Fulcher plots. The ionic cond. max. moves to a higher salt concn. as the temp. increases. IR results indicate that the ester in CP might decomp. at 140° releasing the maleic anhydride ring.
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Voltammetric behavior of electroactive solutes in polyelectrolyte polyethylene glycol-lithium perchlorate by using an ultramicroelectrode. Zhou, Huafang; Dong, Shaojun. Lab. Electroanalytical Chem., Changchun Institute Applied Chem., Changchun, Peop. Rep. China. Fenxi Huaxue (1997), 25(4), 382-386. CODEN: FHHHDT ISSN: 0253-3820. Journal written in Chinese. CAN 127:24959 AN 1997:304203 CAPLUS (Copyright 2001 ACS)
Abstract
The properties are described of PEG polymer electrolyte as a solvent medium for solid-state voltammetry, and the results are given for the dependence of diffusive transport of electroactive solutes on org. small mols., temp., electrolyte and polymer chain length. The diffusion rate or the current response increases with increasing temp. and decreasing polymer chain length. This phenomenon is explained by free vol. and viscosity theory. The org. mols. exert a greater "plasticizing" effect for the polyelectrolyte. The contribution of self-electron exchange is discussed qual.
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Determination of the standard heterogeneous rate constant in polyelectrolyte using steady state microdisk voltammograms. Zhou, Huafang; Dong, Shaojun. Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, Peop. Rep. China. J. Electroanal. Chem. (1997), 425(1-2), 55-59. CODEN: JECHES ISSN: 0368-1874. Journal written in English. CAN 127:57068 AN 1997:289714 CAPLUS (Copyright 2001 ACS)
Abstract
The steady state voltammogram at a microdisk electrode was used to measure the diffusion coeff. and std. heterogeneous rate const. (ks) of ferrocene in polyelectrolyte PEG+LiClO4. The ks obtained is smaller in polyelectrolyte than in liq. medium. Probably the polymer solvent electron transfer dynamics are affected by the relaxation rates of the ether dipole sites on the polymer chains, which are in turn constrained by the rates of polymer chain segment, or local structure, relaxations. The dependence of ks on temp. is obsd. The ks increases with increasing temp.
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In situ scanning tunneling microscopy studies of nanometer size palladium particles on highly oriented pyrolytic graphite. Li, Fenglei; Zhang, Bailin; Wang, Erkang; Dong, Shaojun. Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Peop. Rep. China. J. Electroanal. Chem. (1997), 422(1-2), 27-33. CODEN: JECHES ISSN: 0368-1874. Journal written in English. CAN 127:41315 AN 1997:289644 CAPLUS (Copyright 2001 ACS)
Abstract
A special electrodeposition process of palladium was studied by cyclic voltammetry, XPS and in situ scanning tunneling microscopy (STM). A kind of palladium(IV) complex was attached to the highly oriented pyrolytic graphite (HOPG) electrode surface by electrooxidn. of palladium(II) complex 1st, and was then reduced to palladium particles. The surface complexes and particles of palladium were both characterized by in situ STM and XPS. The Pd particles are in the nanometer range of size and exhibit electrocatalytic activity towards the oxidn. of hydrazine and hydroxylamine.
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An ultramicroelectrode study of ferrocene diffusion and heterogeneous electron transfer rate in polyelectrolyte. Zhou, Huafang; Dong, Shaojun. Laboratory of Electroanalytical Chemistry, Chinese Academy of Sciences, Changchun, Peop. Rep. China. Electrochim. Acta (1997), 42(12), 1801-1807. CODEN: ELCAAV ISSN: 0013-4686. Journal written in English. CAN 127:10284 AN 1997:254803 CAPLUS (Copyright 2001 ACS)
Abstract
Steady-state voltammograms at a microdisk electrode were used to measure the diffusion coeff. (D) and std. heterogeneous rate const. (ks) of ferrocene in polyelectrolyte PEG.MClO4. The diffusion coeff. and std. heterogeneous rate const. of ferrocene are both smaller in polymer solvents than in monomeric solvents. The D and ks of ferrocene were estd. in PEG contg. different concns. and cations of supporting electrolytes, and the dependencies of D and ks on temp. were obsd. The D and ks of ferrocene increase with increasing temp. in polyelectrolyte, and with increasing cation radius of supporting electrolyte, e.g. D and ks increase in the order Bu4NClO4 > NaClO4 > LiClO4. However, D and ks increase with decreasing concn. of supporting electrolyte. The dependence of the half-wave potential (E1/2) on the concn. of the supporting electrolyte is also obsd. The E1/2 shifts in the neg. direction as the concn. of supporting electrolyte increases.
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Study of cupric hexacyanoferrate-modified platinum electrodes using probe beam deflection and electrochemical quartz crystal microbalance techniques. Liu, Changwei; Wang, Ying; Zhu, Guoyi; Dong, Shaojun. Laboratory of Electroanalytical Chemistry, Chinese Academy of Science, Jilin, Peop. Rep. China. Electrochim. Acta (1997), 42(12), 1795-1800. CODEN: ELCAAV ISSN: 0013-4686. Journal written in English. CAN 127:10283 AN 1997:254656 CAPLUS (Copyright 2001 ACS)
Abstract
The ion exchange mechanism accompanying the oxidn./redn. processes of cupric hexacyanoferrate-modified platinum electrodes in different aq. electrolyte solns. was studied by in situ probe beam deflection and the electrochem. quartz crystal microbalance technique. The charge neutrality of the film during the reoxidn./redn. process is accomplished predominantly by the movement of cations, but anions and/or solvent are also participator(s). Also, in KHC8H4O4 (potassium biphthalate) soln., the EQCM data obtained from a chronoamperometry expt. are more complicated than those in KCl and K2SO4 solns.
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Organic Phase Enzyme Electrodes Based on Organohydrogel. Guo, Yizhu; Dong, Shaojun. Laboratory of Electroanalytical Chemistry Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Peop. Rep. China. Anal. Chem. (1997), 69(10), 1904-1908. CODEN: ANCHAM ISSN: 0003-2700. Journal written in English. CAN 126:246131 AN 1997:250657 CAPLUS (Copyright 2001 ACS)
Abstract
A DMF-polyhydroxyl cellulose organohydrogel was prepd., and its applications for enzyme immobilization in construction of org. phase biosensors were exploited. With horseradish peroxidase, tyrosinase, and bilirubin oxidase immobilized in the organohydrogel, enzyme electrodes can be operated in various situations, including aq. buffer, oil/water mixts., and anhyd. org. solvents, and even in DMF, to det. analytes of different solubilities, e.g., org. peroxides, phenolic compds. and bilirubin. Biosensing has no restrictions in terms of measuring media and solubilities of analytes.
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Electrochemical study of the interfacial characteristics of redox-active viologen thiol self-assembled monolayers. Li, Jinghong; Cheng, Guangjin; Dong, Shaojun. Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Peop. Rep. China. Thin Solid Films (1997), 293(1-2), 200-205. CODEN: THSFAP ISSN: 0040-6090. Journal written in English. CAN 126:348740 AN 1997:233548 CAPLUS (Copyright 2001 ACS)
Abstract
The electrochem. behavior of the electroactive self-assembled monolayers (SAMs) of thiol-functionalized viologen, CH3(CH2)9V2+(CH2)8SH, where V2+ is a viologen group, on a gold electrodes was examd. by cyclic voltammetry and electrochem. a.c. impedance. A monolayer of viologen is immobilized on the gold electrode surface via the Au-S bond and the normal potentials corresponding to the two successive 1-electron transfer processes of the viologen active centers are -310 mV and -652 mV (vs. Ag/AgCl) in 0.1 mol L-1 phosphate buffer soln. (pH 6.96) resp. Probably the viologen SAMs are stable and well-behaved monolayers. The exptl. impedance data corresponding to different forms of viologen group were fitted to equiv. elec. circuits, and the surface capacitances and resistances were given. The heterogeneous electron transfer rates of the 1st and the 2nd redox processes are 7.57 s-1 and 1.49 s-1 resp. through a.c. impedance.
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K+ sensors based on supported alkanethiol/phospholipid bilayers. Ding, Lin; Li, Jinghong; Wang, Erkang; Dong, Shaojun. Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, Peop. Rep. China. Thin Solid Films (1997), 293(1-2), 153-158. CODEN: THSFAP ISSN: 0040-6090. Journal written in English. CAN 126:314406 AN 1997:233539 CAPLUS (Copyright 2001 ACS)
Abstract
A novel kind of K+ sensor with valinomycin-incorporated bilayers supported on a gold electrode consisting of self-assembled alkanethiol monolayers (SAMs) and a lipid monolayer has been fabricated successfully. The lipid monolayer is deposited on the alkylated surface of the first alkanethiol monolayer through three different methods, such as the Langmuir-Blodgett (LB) technique, painted method and painted-frozen method. The response of K+ sensors produced by a painted or painted-frozen lipid monolayer on an alkanethiol alkylated gold electrode is larger than that by the LB method, which is due to the difference in fluidity of the three kinds of bilayers. Selectivity coeffs. KK+, Na+, K+K, Li+, K+K, Ca2+ and K+K, Mg2+ are 10-4, 10-4, 2´10-5 and 3´10-5 resp., and there is no obvious difference among different fabricating methods. A linear response toward the potassium ion was found in the range from 10-1 M to 10-5 M with the detection limit of 10-6 M. The sensor has a slope of 60 mV per decade. Meanwhile, the longevity of the sensor was improved obviously for at least two months at about -10°. The higher stability shows the possibility to fabricate a practical biosensor.
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Electrochemical quartz crystal microbalance study on cupric hexacyanoferrate film-modified electrode and its ion exchange. Wang, Ying; Liu, Changwei; Zhu, Guoyi; Dong, Shaojun. Lab. Electroanalytical Chem., Chinese Acad. Sci., Changchun, Peop. Rep. China. Fenxi Huaxue (1997), 25(2), 153-156. CODEN: FHHHDT ISSN: 0253-3820. Journal written in Chinese. CAN 126:298516 AN 1997:166696 CAPLUS (Copyright 2001 ACS)
Abstract
The ion exchange mechanism accompanying the redox process on cupric hexacyanoferrate (CuHCF) modified electrode was studied by electrochem. quartz crystal microbalance technique in various aq. solns. The charge neutrality of the film in redox process is attained predominately by the transport of cation, but anion also participates in this transport.
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Study of Eastman AQ/tetrathiafulvalene-modified carbon fiber microdisk electrodes. Tian, Min; Dong, Shaojun. Lab. Electroanalytical Chem., Chinese Acad. Sci., Changchun, Peop. Rep. China. Fenxi Huaxue (1997), 25(2), 125-129. CODEN: FHHHDT ISSN: 0253-3820. Journal written in Chinese. CAN 126:298515 AN 1997:166656 CAPLUS (Copyright 2001 ACS)
Abstract
Tetrathiafulvalene (TTF) was coated onto microelectrode surface with Eastman-AQ 29D polymer film and the electrochem. behavior of the resulting modified electrodes was studied. The effects of dipping time, scan rate and supporting electrolyte on the modified microelectrode were examd. TTF is oxidized in two consecutive, 1-electron steps to TTF+ and then to TTF2+ in the film. The equil. const. of TTF + TTF++ ® 2TTF+ in the Eastman-AQ 29D film detd. by cyclic voltammetry is 1.25 ´ 106.
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Viologen-thiol self-assembled monolayers for immobilized horseradish peroxidase at gold electrode surface. Li, Jinghong; Yan, Juchao; Deng, Qing; Cheng, Guangjin; Dong, Shaojun. Lab. Electroanalytical Chem., Chinese Acad. Scis., Changchun, Peop. Rep. China. Electrochim. Acta (1997), 42(6), 961-967. CODEN: ELCAAV ISSN: 0013-4686. Journal written in English. CAN 126:222486 AN 1997:105592 CAPLUS (Copyright 2001 ACS)
Abstract
A stable, well-behaved self-assembled monolayer (SAM) of viologen-functionalized thiol was used to immobilize and elec. connect horseradish peroxidase (HRP) at gold electrode. Viologen groups in SAMs facilitated the electron transfer from the electrode to the protein active site so that HRP exhibited a quasi-reversible redox behavior. HRP adsorbed in the SAMs is very stable, and close to a monolayer with the surface coverage of 6.5´10-11 mol/cm2. The normal potential of HRP is -580 mV vs Ag/AgCl corresponding to ferri/ferro active center and the std. electron transfer rate const. is 3.41 s-1 in 0.1 M phosphate buffer soln. (pH 7.1). This approach shows a great promise for designing enzyme electrodes with other redox proteins and practical use in tailoring a variety of amperometric biosensor devices.