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Titolo:
CHEMILUMINESCENCE OF CYPRIDINA LUCIFERIN ANALOGS .1. EFFECT OF PH ON RATES OF SPONTANEOUS AUTOXIDATION OF CLA IN AQUEOUS BUFFER SOLUTIONS
Autore:
FUJIMORI K; NAKAJIMA H; AKUTSU K; MITANI M; SAWADA H; NAKAYAMA M;
Indirizzi:
UNIV TSUKUBA,DEPT CHEM TSUKUBA IBARAKI 305 JAPAN NOF CORP,TSUKUBA RES LAB TSUKUBA IBARAKI 30026 JAPAN
Titolo Testata:
Perkin transactions. 2
fascicolo: 12, , anno: 1993,
pagine: 2405 - 2409
SICI:
0300-9580(1993):12<2405:COCLA.>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
BIOLUMINESCENCE; PEROXIDE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
19
Recensione:
Indirizzi per estratti:
Citazione:
K. Fujimori et al., "CHEMILUMINESCENCE OF CYPRIDINA LUCIFERIN ANALOGS .1. EFFECT OF PH ON RATES OF SPONTANEOUS AUTOXIDATION OF CLA IN AQUEOUS BUFFER SOLUTIONS", Perkin transactions. 2, (12), 1993, pp. 2405-2409

Abstract

From the pH-rate profile of autoxidation of the Cypridina luciferin analogue {2-methyl-6-phenylimidazo[1,2-a]pyrazin-3(7H)-one, CLA}, CLA was found not to react with ground-state molecular oxygen at a measurable rate, while the conjugate base of CLA was found to react with molecular oxygen with a second-order rate constant of 0.434 +/- 0.001 dm3 mol-1 s-1 at 25-degrees-C. No chain reaction process contributed in theautoxidation of CLA. Superoxide dismutase (SOD) was observed to reduce the rate of the autoxidation to a small extent in the reaction with low-pH buffers, while SOD did not affect the reaction in buffers of pHhigher than 7. The intimate radical pair (CLA.O2.-) is proposed to bethe primary product of the reaction.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 15/07/20 alle ore 08:40:12