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Titolo:
Study of the photophysics and energy transfer of 9,10-diphenylanthracene in solution
Autore:
Suzuki, T; Nagano, M; Watanabe, S; Ichimura, T;
Indirizzi:
Tokyo Inst Technol, Dept Chem, Meguro Ku, Tokyo 1528551, Japan Tokyo Inst Technol Tokyo Japan 1528551 , Meguro Ku, Tokyo 1528551, Japan
Titolo Testata:
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
fascicolo: 1-2, volume: 136, anno: 2000,
pagine: 7 - 13
SICI:
1010-6030(20000831)136:1-2<7:SOTPAE>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
THERMAL LENSING TECHNIQUE; INTRAMOLECULAR HYDROGEN ABSTRACTION; EXCITED TRIPLET-STATE; QUANTUM YIELD; FLASH-PHOTOLYSIS; BENZOPHENONE; RELAXATION; SPECTROSCOPY; MOLECULES;
Keywords:
time-resolved thermal lensing; 9,10-diphenylanthracene; energy transfer;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
29
Recensione:
Indirizzi per estratti:
Indirizzo: Ichimura, T Tokyo Inst Technol, Dept Chem, Meguro Ku, 2-12-1 Ohokayama, Tokyo 1528551,Japan Tokyo Inst Technol 2-12-1 Ohokayama Tokyo Japan 1528551 Japan
Citazione:
T. Suzuki et al., "Study of the photophysics and energy transfer of 9,10-diphenylanthracene in solution", J PHOTOCH A, 136(1-2), 2000, pp. 7-13

Abstract

Photophysics of 9, 10-diphenylanthracene (DPA) in benzene solution was studied with time-resolved thermal lensing (TRTL) technique. The TRTL signal was composed of the fast and slow-rising components. The heat conversion efficiency, which is defined as the ratio of energy released as heat against energy absorbed, was determined to be 0.31+/-0.01, revealing that the fluorescence quantum yield is fairly large (0.88+/-0.03), while the quantum yieldfor triplet formation is quite small (0.04+/-0.02) by analyzing the slow component of the TRTL signal. The triplet-triplet (T-T) absorption of DPA inbenzene appeared for the wavelength region of 420-470 nm, obtained by energy transfer with triplet benzophenone used as a photosensitizer. The quenching rate constant of DPA by triplet benzophenone was determined to be (3.6+/-0.3)x 10(9) M-1 s(-1) with Stern-Volmer plots. The intrinsic energy transfer rate was also estimated by analyzing the time profile of the TRTL signal. (C) 2000 Elsevier Science S.A. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/04/20 alle ore 23:18:58