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Issue 22, 2003
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S1–S0 Electronic spectrum of jet-cooled m-aminophenol

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The S1 and S0 states of m-aminophenol have been investigated using laser induced fluorescence and dispersed fluorescence spectroscopy in a supersonic jet. The dispersed fluorescence spectra, obtained by exciting the bands at 34 109 and 34 469 cm−1, show the same vibronic structure, which suggests the coexistence of rotational isomers in m-aminophenol. A quantum chemical calculation also supports the coexistence of rotational isomers. From the relative intensities in the spectrum and the calculated stabilization energies of isomers, the bands are assigned to the origin of the cis- and trans-isomers, respectively. The dispersed fluorescence spectra obtained by exciting the S1 vibronic bands were analyzed by comparing with the calculated vibrational frequencies and IR and Raman spectra. From the analysis, the S1 vibronic bands have been assigned. It was found that a one-to-one correspondence between the S1 and S0 vibrations is broken, and vibrational mixing due to Fermi resonance or the Duschinsky effect is suggested.

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Publication details

The article was received on 07 Aug 2003, accepted on 19 Sep 2003 and first published on 13 Oct 2003

Article type: Paper
DOI: 10.1039/B309461H
Citation: Phys. Chem. Chem. Phys., 2003,5, 5044-5050
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    S1–S0 Electronic spectrum of jet-cooled m-aminophenol

    M. Shinozaki, M. Sakai, S. Yamaguchi, T. Fujioka and M. Fujii, Phys. Chem. Chem. Phys., 2003, 5, 5044
    DOI: 10.1039/B309461H

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