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Titolo:
Langmuir monolayer of organoalkoxysilane for vitamin B-12-modified electrode
Autore:
Ariga, K; Tanaka, K; Katagiri, K; Kikuchi, J; Shimakoshi, H; Ohshima, E; Hisaeda, Y;
Indirizzi:
NAIST, Grad Sch Mat Sci, Nara 6300101, Japan NAIST Nara Japan 6300101NAIST, Grad Sch Mat Sci, Nara 6300101, Japan Kyushu Univ, Grad Sch Engn, Dept Chem & Biochem, Higashi Ku, Fukuoka 8128581, Japan Kyushu Univ Fukuoka Japan 8128581 em, Higashi Ku, Fukuoka 8128581, Japan
Titolo Testata:
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
fascicolo: 16, volume: 3, anno: 2001,
pagine: 3442 - 3446
SICI:
1463-9076(2001)3:16<3442:LMOOFV>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
CARBON-SKELETON REARRANGEMENTS; POROUS-GLASS PLATE; SYNTHETIC BILAYER-MEMBRANE; HYDROPHOBIC VITAMIN-B12; PERMEATION CONTROL; ELECTROCHEMICAL CATALYSIS; COBALT COMPLEXES; GLUTAMATE MUTASE; PHASE-TRANSITION; AQUEOUS-SOLUTION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
33
Recensione:
Indirizzi per estratti:
Indirizzo: Ariga, K NAIST, Grad Sch Mat Sci, 8916-5 Takayama, Nara 6300101, Japan NAIST 8916-5 Takayama Nara Japan 6300101 ma, Nara 6300101, Japan
Citazione:
K. Ariga et al., "Langmuir monolayer of organoalkoxysilane for vitamin B-12-modified electrode", PHYS CHEM P, 3(16), 2001, pp. 3442-3446

Abstract

In order to develop a novel type of vitamin B-12-functionalizcd electrode,the monolayer properties of the vitamin B-12 mimics, which have a core structurally identical with the naturally occurring vitamin B-12 and seven ester chains on the outside, have been investigated as a mixed monolayer with an organosilane amphiphile. Vitamin B-12 derivatives having seven C-8 chains were stably incorporated into the matrix organosilane monolayer. while the short C-3 chain derivatives were easily squeezed out from the matrix monolayer upon compression. Analyses of the molecular areas revealed that the long chain derivatives had a face-on orientation in the matrix monolayer. The mixed monolayers of the vitamin B-12 with the long chains and the organosilane amphiphile were transferred as an X-type LB film on a quartz plate that showed reasonable UV absorbance. The monolayer containing the vitamin B-12 derivative was similarly immobilized on an ITO electrode. A cyclic voltammetric measurement of this electrode in aqueous solution showed a Co(II)/Co(I) redox couple at -0.65 V vs. Ag/AgCl which is in good agreement with the corresponding value of the vitamin B-12 derivative dissolved in methanol. It indicates that this modified electrode can be used as a reactive electrode with a vitamin B-12 function.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/03/20 alle ore 09:37:34