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Thermally reversible novel photochromic dihydroindoles
Author(s) -
Eguchi Nobutaka,
Ubukata Takashi,
Yokoyama Yasushi
Publication year - 2007
Publication title -
journal of physical organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.325
H-Index - 66
eISSN - 1099-1395
pISSN - 0894-3230
DOI - 10.1002/poc.1265
Subject(s) - photochromism , chemistry , moiety , adamantane , toluene , photochemistry , polymer chemistry , organic chemistry
Thermally reversible novel photochromic 4,5‐ and 6,7‐dihydroindoles possessing a hexafluoropropano‐bridge, a spiro‐adamantane moiety and a phenyl group were synthesized and their photochemical forward as well as thermal back reactions were investigated. While the open coloured form of 4,5‐dihydroindole had an absorption maximum at 417 nm in toluene, that of 6,7‐dihydroindole at 553 nm. Although the thermal back reaction of the former took about 2 h at r.t., that of the latter completed within a few minutes. Copyright © 2007 John Wiley & Sons, Ltd.