Solvation effects in jet-cooled 7-hydroxyquinoline

An investigation of the laser-induced fluorescence of jet-cooled 7-hydroxy quinoline and its complexes with water and methanol is presented. The free molecule exhibits two electronic transitions which are due to rotational isomers. The 1:1 complexes present a moderate red spectral <500 cm −1 shif...

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Bibliographic Details
Published inChemical physics letters Vol. 220; no. 3; pp. 235 - 242
Main Authors Lahmani, F., Douhal, A., Breheret, E., Zehnacker-Rentien, A.
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 01.04.1994
Elsevier Science
Subjects
Atomic and molecular physics
Exact sciences and technology
Molecular properties and interactions with photons
Nuclear resonance and relaxation
Physics
Water
Vibronic states
Inorganic compounds
Nitrogen heterocycle
Laser induced fluorescence
Fluorescence
Experimental study
Alcohols
Supersonic transport
Energy-level transitions
Solvation
Hydrogen bonds
Excitation spectrum
Rotational isomers
Organic compounds
Methanol
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Summary:An investigation of the laser-induced fluorescence of jet-cooled 7-hydroxy quinoline and its complexes with water and methanol is presented. The free molecule exhibits two electronic transitions which are due to rotational isomers. The 1:1 complexes present a moderate red spectral <500 cm −1 shift and a free-molecule-like fluorescence. Higher clusters with H 2O and CH 3OH lead to an unusually large red-shift (≈2000 cm −1 and to a strong modification of the vibrational pattern in excitation and dispersed emission spectra. No excited state tautomerization was found in these clusters. The structures of the hydrogen-bonded clusters are discussed in the context of these data.
ISSN:0009-2614
1873-4448
DOI:10.1016/0009-2614(94)00181-2