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Photodimerization of 1 H ‐azepine‐2,7‐dione
Author(s) -
Takabatake Tohru,
Hasegawa Minoru
Publication year - 1994
Publication title -
journal of heterocyclic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.321
H-Index - 59
eISSN - 1943-5193
pISSN - 0022-152X
DOI - 10.1002/jhet.5570310136
Subject(s) - chemistry , azepine , dimer , monomer , excimer , irradiation , photochemistry , molecule , absorption spectroscopy , mercury vapor lamp , fluorescence , high pressure , polymer chemistry , medicinal chemistry , organic chemistry , polymer , optics , physics , engineering physics , nuclear physics , engineering
1 H ‐Azepine‐2,7‐dione 2 afforded photodimer 8 by irradiation using a high or low pressure mercury lamp. Photodimer 8 had a unique structure which must have formed with the prototropy in one of the two molecules of compound 2 . Measurement of the fluorescence spectra of 2 indicated a spectrum of the excimer during the dimerization of 2 . Irradiation of the dimer of 2 at its wave‐length of maximal absorption failed to cause it to change into a monomer of 2 .