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Titolo:
Studies on CoSalen immobilized onto N-(4-pyridylmethylidene)-chitosan
Autore:
Hu, DD; Cui, YL; Dong, XL; Fang, Y;
Indirizzi:
Shaanxi Normal Univ, Dept Chem, Xian 710062, Peoples R China Shaanxi Normal Univ Xian Peoples R China 710062 710062, Peoples R China
Titolo Testata:
REACTIVE & FUNCTIONAL POLYMERS
fascicolo: 1-3, volume: 48, anno: 2001,
pagine: 201 - 207
SICI:
1381-5148(20010502)48:1-3<201:SOCION>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
OXIDATION; COMPLEXES; CHITOSAN; ADDUCTS; COBALT;
Keywords:
cobalt; chitosan; complex; immobilization;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
16
Recensione:
Indirizzi per estratti:
Indirizzo: Hu, DD Shaanxi Normal Univ, Dept Chem, Xian 710062, Peoples R China Shaanxi Normal Univ Xian Peoples R China 710062 , Peoples R China
Citazione:
D.D. Hu et al., "Studies on CoSalen immobilized onto N-(4-pyridylmethylidene)-chitosan", REACT FUNCT, 48(1-3), 2001, pp. 201-207

Abstract

A chitosan (CS) derivative, N-(4-pyridylmethylidene)-CS (PMC) was synthesized and a cobalt(II) complex of bis(salicylideneethylene diamine) (CoSalen)was immobilized on it. The structure of the immobilized CoSalen was characterized by elemental analysis, IR, XPS, fluorescence and ESR spectrocopy. It was demonstrated that the immobilization of CoSalen was realized through the coordination of nitrogen atom of the pendant group, pyridyl in PMC to the Co(II) in CoSalen. The polymer supported complex is more efficient than the corresponding monomeric complex in catalysing the oxidation of DOPA using oxygen as an oxidizer. The results may be attributed to site isolation effect offered by the supporting polymer chain. A mechanism similar to that for an enzymatic catalysis was proposed. (C) 2001 Elsevier Science B.V. Allrights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 06/04/20 alle ore 08:21:02