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Titolo:
MECHANISM OF PROTON-TRANSFER IN PROTEINS .2. RELATIONSHIP BETWEEN LOCAL PROPERTIES OF SOLVENT AND RATE OF EXCITED-STATE PROTON-TRANSFER FOR2-NAPHTHOL DERIVATIVES BOUND TO SELECTED SITES OF PROTEINS
Autore:
JANKOWSKI A; WICZK W; JANIAK T;
Indirizzi:
WROCLAW B BEIRUT UNIV,INST CHEM,F JOLIOT CURIE 14 PL-50383 WROCLAW POLAND UNIV GDANSK,DEPT CHEM PL-80952 GDANSK POLAND
Titolo Testata:
Journal of photochemistry and photobiology. A, Chemistry
fascicolo: 1-2, volume: 85, anno: 1995,
pagine: 69 - 75
SICI:
1010-6030(1995)85:1-2<69:MOPIP.>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
FLUORESCENCE; DYNAMICS;
Keywords:
PROTON TRANSFER; PROTEINS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
21
Recensione:
Indirizzi per estratti:
Citazione:
A. Jankowski et al., "MECHANISM OF PROTON-TRANSFER IN PROTEINS .2. RELATIONSHIP BETWEEN LOCAL PROPERTIES OF SOLVENT AND RATE OF EXCITED-STATE PROTON-TRANSFER FOR2-NAPHTHOL DERIVATIVES BOUND TO SELECTED SITES OF PROTEINS", Journal of photochemistry and photobiology. A, Chemistry, 85(1-2), 1995, pp. 69-75

Abstract

Centres of gravity (CGs) of the fluorescence bands of protonated and deprotonated forms of 2-naphthol derivatives (NSOH), bound to proteins, were determined at various experimental conditions. CGs are correlated with the solvent relaxation time around fluorophores. The variationin the rate of excited state proton transfer (ESPT) for NSOH groups bound to proteins can be explained in terms of the solvent polarizability and the solvent relaxation rate with respect to a moving proton. From a comparison of the fluorescence decay data with the results of steady state measurements, the probability of geminal recombination in the ESPT reaction is estimated. This probability is negligible for one of our samples and 0.3-0.4 for two other samples. The mechanism of thiseffect is discussed briefly.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/12/20 alle ore 15:21:11