SPECTRAL PROPERTIES OF (ISO)ALLOXAZINES IN THE VAPOUR PHASE |
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| Authors: | Jan K.,Eweg ,Franz,Mü er ,Dick,Bebelaar Joop D. W. van, Voorst |
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| Affiliation: | Department of Biochemistry, Agricultural University, De Dreijen 11, 6703 BC Wageningen, The Netherlands;†Laboratory for Physical Chemistry, University of Amsterdam, Nieuwe Prinsengracht 126, 1018 VZ Amsterdam, The Netherlands |
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| Abstract: | ![]()
Abstract— Spectral properties of alloxazine and isoalloxazine derivatives were determined at high temperatures in the vapour phase. In comparison with spectra observed in solution, vapour phase spectrometry gives primary photophysical properties of the isolated chromophore. Fluorescence lifetimes in the vapour phase range from <0.5 to 18 ns. There is some indication that an intramolecular complex can exist between the isoalloxazine moiety and its aliphatic side chain carrying a polar (hydroxyl) group. Direct photodissociation of the molecule in its first electronically excited singlet state is not very probable. |
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