Remarkable Improvements in the Photochromic Reversibilities of Fulgides in Solid Films
作者:
Ryoka Matsushima,
Tomohiro Hayashi,
Masafumi Nishiyama,
期刊:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals
(Taylor Available online 2000)
卷期:
Volume 344,
issue 1
页码: 241-246
ISSN:1058-725X
年代: 2000
DOI:10.1080/10587250008023843
出版商: Taylor & Francis Group
关键词: photochromic fulgides;photochemical fatigue resistance;sealed air-tight film;dimethylaniline group
数据来源: Taylor
摘要:
Oxazolyl fulgide withp-dimethylaniline group (fulgide1) revealed favorable absorption spectra, high photochromic responses and high thermostabilities in a polystyrene or a poly(methyl methacrylate) film spin-coated on a silica glass, but it suffered from extensive photochemical fatigues while phenyl-substituted oxazolyl fulgide (fulgide2) revealed much less fatigues. The photochemical fatigues of fulgide1could be substantially suppressed by a simple treatment of the spin-coated films to keep air-tight. Similar improvement in the photochemical fatigue resistance was obtained with films of the well-known furylfulgide. Further, thermal stabilities were significantly improved towards heating at 80°C. These effects are ascribable to the effective shielding of the air (molecular oxygen).
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