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Titolo:
SUBSTITUENT AND SOLVENT EFFECTS ON PHOTOEXCITED STATES OF FUNCTIONALIZED FULLERENE[60]
Autore:
LUO C; FUJITSUKA M; WATANABE A; ITO O; GAN L; HUANG Y; HUANG CH;
Indirizzi:
TOHOKU UNIV,INST CHEM REACT SCI,AOBA KU SENDAI MIYAGI 98077 JAPAN TOHOKU UNIV,INST CHEM REACT SCI,AOBA KU SENDAI MIYAGI 98077 JAPAN BEIJING UNIV,STATE KEY LAB RARE EARTH MAT CHEM & APPLICAT BEIJING 100871 PEOPLES R CHINA
Titolo Testata:
Journal of the Chemical Society. Faraday transactions
fascicolo: 4, volume: 94, anno: 1998,
pagine: 527 - 532
SICI:
0956-5000(1998)94:4<527:SASEOP>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
PHOTOINDUCED ELECTRON-TRANSFER; LASER-FLASH-PHOTOLYSIS; PHOTOPHYSICAL PROPERTIES; TRIPLET C-60; C-70; FLUORESCENCE; DERIVATIVES; EMISSION; SPECTRA; C60;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
41
Recensione:
Indirizzi per estratti:
Citazione:
C. Luo et al., "SUBSTITUENT AND SOLVENT EFFECTS ON PHOTOEXCITED STATES OF FUNCTIONALIZED FULLERENE[60]", Journal of the Chemical Society. Faraday transactions, 94(4), 1998, pp. 527-532

Abstract

Steady-state absorption/fluorescence spectra and time-resolved absorption/fluorescence spectra were measured to investigate the photoexcited states properties of N-methylpyrrolidinofullerenes C-60[(C3H6N)R][R = H (1), p-C6H4CHO (2), p-C6H4NO2 (3), p-C6H4OMe (4), p-C6H4NMe2 (5)]. Functionalization causes bandshifts to longer wavelength for absorption and fluorescence spectra, accompanied by enhancements in the fluorescence quantum yields in nonpolar solvents. The triplet (T) states of these derivatives show very similar properties (quantum yields, molar absorption coefficients and O-2 quenching) to C-60 whereas T-T absorption bands shift to short wavelength and the lowest triplet energies decrease compared with those of C-60. Derivative 5, which has a strong electron-donating group, shows a prominent solvent polarity effect on the fluorescent quantum yield and lifetime, and triplet formation, suggesting that intramolecular charge transfer takes place.

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Documento generato il 14/07/20 alle ore 13:21:36