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Magnetic field effects on the photochromism of hexaphenylbiimidazolyl

✍ Scribed by Hiroyasu Sato; Kazuo Kasatani; Shigezo Murakami

Publisher
Elsevier Science
Year
1988
Tongue
English
Weight
382 KB
Volume
151
Category
Article
ISSN
0009-2614

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✦ Synopsis

The external magnetic field effect on the decoloring reaction in the photochromism of hexaphenylbiimidazolyl (HPBI) in a poly (methyl methacrylate) matrix was studied. The decoloring occurs via the recombination of two triphenylimidazolyl radicals to regenerate HPBI, the reaction obeying second-order kinetics. The second-order rate constant is reduced on application of an external magnetic field, decreasing by z 30% at 5 0.4 T (40Β°C).

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