Effect of quaternization on electron diffusion coefficients for redox hydrogels based on poly(4-vinylpyridine)

Aoki, Atsushi; Rajagopalan, Rema; Heller, Adam

doi:10.1021/j100014a034

Cited by 88 publications

(98 citation statements)

References 2 publications

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“…The quaternization reaction followed the procedure in the references. 17,18 As analyzed, 10 one Os-complex was attached every 5.6 imidazoles and one of free every 4.6 imidazoles was quaternized with one ethylamine group (Figure 1). The copolymer of polyacrylamide and poly(N-vinylimidazole) complexed with Os(dCl-bpy) 2 Figure 1.…”

Section: Methodsmentioning

confidence: 99%

Co-Electrodeposition of Bilirubin Oxidase with Redox Polymer through Ligand Substitution for Use as an Oxygen Reduction Cathode

Shin¹,

Kang

2010

Bulletin of the Korean Chemical Society

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The water soluble redox polymer, poly(N-vinylimidazole) complexed with Os(4,4'-dichloro-2,2'-bipyridine)2Cl] + (PVI-[Os(dCl-bpy)2Cl] + ), was electrodeposited on the surface of a glassy carbon electrode by applying cycles of alternating square wave potentials between 0.2 V (2 s) and 0.7 V (2 s) to the electrode in a solution containing the redox polymer. The coordinating anionic ligand, Cl -of the osmium complex, became labile in the reduced state of the complex and was substituted by the imidazole of the PVI chain. The ligand substitution reactions resulted in crosslinking between the PVI chains, which made the redox polymer water insoluble and caused it to be deposited on the electrode surface. The deposited film was still electrically conducting and the continuous electrodeposition of the redox polymer was possible. When cycles of square wave potentials were applied to the electrode in a solution of bilirubin oxidase and the redox polymer, the enzyme was co-electrodeposited with the redox polymer, because the enzymes could be bound to the metal complexes through the ligand exchange reactions. The electrode with the film of the PVI-[Os(dCl-bpy)2Cl] + redox polymer and the co-electrodeposited bilirubin oxidase was employed for the reduction of O2 and a large increase of the currents was observed due to the electrocatalytic O2 reduction with a half wave potential at 0.42 V vs. Ag/AgCl.

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Section: Methodsmentioning

confidence: 99%

Co-Electrodeposition of Bilirubin Oxidase with Redox Polymer through Ligand Substitution for Use as an Oxygen Reduction Cathode

Shin¹,

Kang

2010

Bulletin of the Korean Chemical Society

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“…And also, the Os-center of the QPVP-Os polymer in the multilayers does not lose its own catalytic acitvity for the oxidation of ascorbic acid, but also can be used as an electrochemical sensor for the detection of ascorbic acid in the presence of dopamine. It is much promising for the multilayer films to be used as an electrochemical sensor for detecting the reduction of BrO ) was synthesized and characterized by the previously published procedures [24] and kindly provided by professor Xi Zhang (Jilin University). 4-ABA and poly (diallyldimethylammonium chloride ) (PDDA) was purchased from Aldrich.The absolute ethanol was dried over 3 ä molecular sieve and lithium perchlorate was dried at about 90 8C before use, other reagents were of analytical reagent grade and used as received.…”

Section: Introductionmentioning

confidence: 99%

Multilayer Assemblies Consisting of Tri‐Vanadium‐Substituted Heteropolyanions and Its Electrocatalytic Properties

et al. 2003

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We describe the controlled fabrication of ultrathin multilayer films consisting of tri-vanadium-substituted heteropolytungstate anions (denoted as P 2 W 15 V 3 ) and a cationic polymer of quaternized poly (4-vinylpyridine) partially complexed with osmium bis(2,2'-bipyridine) (denoted as QPVP-Os) on the 4-aminobenzoic acid (4-ABA) modified glassy carbon electrode (GCE) surface based on layer-by-layer assembly. Cyclic voltammetry and UV-vis absorption spectrometry have been used to easily monitor the thickness and uniformity of thus-formed multilayer films. The V-centered redox reaction of P 2 W 15 V 3 in the multilayer films can effectively catalyze the reduction of BrO

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“…Since many studies have been done on electrodes modified with these complexes [4][5][6][7][8][9][10][11][12][13][14][15][16], these electrodes have come to be applied in chemical sensors [4], electrocatalysis [5,6], and fuel cell power systems. These electrodes have a potential to develop new devices because of many combinations of a polymer matrix and a functional complex.…”

Section: Introductionmentioning

confidence: 99%

Development of Electrochemical Analyzer for Polymer-Coated Electrode

Shiroishi

Tokita

Kaneko

2002

J. Comput. Chem. Jpn.

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A program, called PLEC-1, has been developed with Visual Basic to simulate and analyze the electrochemical measurement of a polymer-coated electrode with dispersed functional molecules. The program has two independent buffers for oxidant and reductant per one material and can concurrently treat seven materials and three chemical reactions of either first-or second-order. The user can not only experience virtual cyclic voltammetry and potential-step chronoamperometry but also analyze cyclic voltammograms by the GaussNewton method using the program. In PLEC-1, simultaneous partial differential equations are solved by the combination of Crank-Nicolson and iteration methods.

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Effect of quaternization on electron diffusion coefficients for redox hydrogels based on poly(4-vinylpyridine)

Cited by 88 publications

References 2 publications

Co-Electrodeposition of Bilirubin Oxidase with Redox Polymer through Ligand Substitution for Use as an Oxygen Reduction Cathode

Co-Electrodeposition of Bilirubin Oxidase with Redox Polymer through Ligand Substitution for Use as an Oxygen Reduction Cathode

Multilayer Assemblies Consisting of Tri‐Vanadium‐Substituted Heteropolyanions and Its Electrocatalytic Properties

Development of Electrochemical Analyzer for Polymer-Coated Electrode

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