Photophysics of tropolone

The excited state fluorescence lifetimes of isolated tropolone in a supersonic expansion have been measured as a function of vibrational energy in the E vib=0–293 cm −1 region. A fluorescence quantum yield of 0.06 is estimated for the zero-point level of S 1; the lifetimes decrease rapidly with incr...

Full description

Saved in:
Bibliographic Details
Published inChemical physics letters Vol. 305; no. 1; pp. 1 - 7
Main Authors MacKenzie, V.J, Sinha, H.K, Wallace, S.C, Steer, R.P
Format Journal Article
LanguageEnglish
Published Elsevier B.V 14.05.1999
Online AccessGet full text

Cover

More Information
Summary:The excited state fluorescence lifetimes of isolated tropolone in a supersonic expansion have been measured as a function of vibrational energy in the E vib=0–293 cm −1 region. A fluorescence quantum yield of 0.06 is estimated for the zero-point level of S 1; the lifetimes decrease rapidly with increasing vibrational energy. Semi-empirical calculations of the energies of nearby excited states suggest that intersystem crossing to T 3 may dominate the non-radiative decay of vibrationless S 1, whereas the decrease of lifetime with increasing E vib is due to an increasing rate of internal conversion via the `proximity effect'.
ISSN:0009-2614
1873-4448
DOI:10.1016/S0009-2614(99)00349-8