Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Incorporation of 1,1 '-ferrocenedimethanol into polyphenosafranin and a binding interaction between them
Autore:
Komura, T; Yamaguchi, T; Ishihara, M; Niu, GY;
Indirizzi:
Kanazawa Univ, Div Mat Chem, Fac Engn, Kanazawa, Ishikawa 9208667, Japan Kanazawa Univ Kanazawa Ishikawa Japan 9208667 wa, Ishikawa 9208667, Japan
Titolo Testata:
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
fascicolo: 1, volume: 513, anno: 2001,
pagine: 59 - 66
Fonte:
ISI
Lingua:
ENG
Soggetto:
AQUEOUS-MEDIA; ELECTROPOLYMERIZED AZINES; MOLECULAR RECOGNITION; MODIFIED ELECTRODES; POLY(NEUTRAL RED); NADH OXIDATION; ACID-SOLUTIONS; FILMS; POLYMERS; ELECTROCATALYSIS;
Keywords:
polyphenosafranin; 1,1 '-ferrocenedimethanol; electrocatalysis; binding interaction; incorporation into film;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
24
Recensione:
Indirizzi per estratti:
Indirizzo: Komura, T Kanazawa Univ, Div Mat Chem, Fac Engn, 40 Kodatsuno 2-Chome, Kanazawa, Ishikawa 9208667, Japan Kanazawa Univ 40 Kodatsuno 2-Chome Kanazawa Ishikawa Japan 9208667
Citazione:
T. Komura et al., "Incorporation of 1,1 '-ferrocenedimethanol into polyphenosafranin and a binding interaction between them", J ELEC CHEM, 513(1), 2001, pp. 59-66

Abstract

This paper describes the electrocatalytic effect of polyphenosafranin films on the oxidation of 1,1'-ferrocenedimethanol (FM). Electrode modificationwith the polymer raised the voltammetric current of FM in its dilute solutions markedly. This effect arose from the preconcentration of FM on electrode surfaces. A partition coefficient of about 2.3 x 10(4) was obtained for the FM distribution between the polymer film and an acidic aqueous solution. Although adding 1-propanol to the solution lowered it, a sharp drop observed at low 1-propanol concentrations cannot be ascribed to the medium effect on FM. A positive shift in the FM redox potential due to incorporation indicated that the partition coefficient of the oxidized form FM+ was about 400 times lower than that of the uncharged form. Since the surface concentration of FM more than doubled upon reducing the polymer, no donor-acceptor interaction may play a major role in determining a binding interaction between FM and the polymer. The pH dependence of the surface concentration suggested that the protonated primary amino group of the polymer strengthens thechemical interaction. Since FM formed an insoluble 1: 1 complex with monomeric phenosafranin in acidic solutions, one can safely state that the polymer interacts specifically with FM, thus reducing its activity coefficient in the polymer phase greatly. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 15/07/20 alle ore 21:20:43