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Evidence for S1/S2 electronic state mixing in the S1 ←l S0 fluorescence excitation spectrum of 1-naphthol

✍ Scribed by Susan J. Humphrey; David W. Pratt

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
413 KB
Volume
257
Category
Article
ISSN
0009-2614

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✦ Synopsis

Rotationatly resolved fluorescence excitation spectra of two vibronic bands at AE= 410.5 and 414.9 cm -l in the S l ~ S O electronic transition of trans-l-naphthol have been recorded and analyzed. The analysis reveals that the in-plane transition dipole moment of the 410 cm-1 band makes an angle of -36 ° with the a inertial axis, the same as the origin band, whereas the corresponding angle of the 414 cm-1 band is + 55 °. Additionally, the spectrum of the 414 cm-1 band is perturbed. These effects are attributed to a coupling of the 414 cm-1 vibrational level of the S 1 electronic state to the S 2 electronic state which may influence the proton transfer behavior of 1-naphthol.

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