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Luminescent Excited States of Phthalideisoquinolines: Studies on Low Temperature Spectra with some Observations on the Photochemistry and Mass Spectrometry of these Compounds
Author(s) -
Turnbull James H.,
Bowd Alexander
Publication year - 1978
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1002/ijch.197800039
Subject(s) - chemistry , excited state , luminescence , mass spectrometry , photochemistry , fluorescence , isomerization , emission spectrum , spectral line , analytical chemistry (journal) , atomic physics , environmental chemistry , organic chemistry , chromatography , optoelectronics , catalysis , physics , quantum mechanics , astronomy
The phthalideisoquinolines narcotine and hydrastine show anomalous blue fluorescence emissions in glassy media at 77 K, whereas the closely related compound bicuculline, in which the configuration of the C–1 proton is reversed, shows no such effect. We propose that this blue emission arises from a phthalidestilbene system formed by a reversible excited‐state isomerisation.