Spectroscopic and photophysical properties of ZNTPP in a room temperature ionic liquid - Publikacja - MOST Wiedzy

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Spectroscopic and photophysical properties of ZNTPP in a room temperature ionic liquid

Abstrakt

The steady-state absorption and emission spectra and the time-resolved Soret- and Q-band excited fluorescence profiles of the model metalloporphyrin, ZnTPP, have been measured in a highly purified sample of the common room temperature ionic liquid, [bmim][PF(6)]. S(2)-S(0) emission resulting from Soret-band excitation behaves in a manner completely consistent with that of molecular solvents of the same polarizability. The ionic nature of the solvent and its slow solvation relaxation times have no significant effect on the nature of the radiationless decay of the S(2) state, which decays quantitatively to S(1) at a population decay rate that is consistent with the weak coupling case of radiationless transition theory (energy gap law). The ratio of the intensities of the Qα:Qβ (0-0:1-0) bands is consistent with the solvatochromic shift correlation data obtained for molecular solvents. The temporal S(1) fluorescence decay profiles measured at a single emission wavelength are biexponential; the longer-lived major component is similar to that observed for ZnTPP in molecular solvents, and the minor shorter-lived component is attributed to solvent relaxation processes on a nanosecond time scale.

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Informacje szczegółowe

Kategoria:
Publikacja w czasopiśmie
Typ:
artykuł w czasopiśmie wyróżnionym w JCR
Opublikowano w:
JOURNAL OF PHYSICAL CHEMISTRY A nr 114,
ISSN: 1089-5639
Język:
angielski
Rok wydania:
2010
Opis bibliograficzny:
Szmytkowski J., Bond T., Paige M., Scote R., Steer R.: Spectroscopic and photophysical properties of ZNTPP in a room temperature ionic liquid// JOURNAL OF PHYSICAL CHEMISTRY A. -Vol. 114, nr. Iss. 43 (2010),
DOI:
Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1021/jp108428k
Weryfikacja:
Politechnika Gdańska

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