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SPECTRAL PROPERTIES OF (ISO)ALLOXAZINES IN THE VAPOUR PHASE
Author(s) -
Eweg Jan K.,
Müer Franz,
Bebelaar Dick,
Voorst Joop D. W. van
Publication year - 1980
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.1980.tb03725.x
Subject(s) - chromophore , moiety , intramolecular force , photodissociation , chemistry , photochemistry , phase (matter) , singlet state , fluorescence , excited state , polar , molecule , analytical chemistry (journal) , stereochemistry , organic chemistry , optics , atomic physics , physics , astronomy
— 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.