Chemistry Letters
Online ISSN : 1348-0715
Print ISSN : 0366-7022
Photochromism of Aza-aromatics with Hydroxy Group. Intermolecular Proton Transfer in Glassy Solution
Keiichiro OgawaMasatoshi MiuraToshio NakayamaJun Harada
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2003 Volume 32 Issue 9 Pages 840-841

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Abstract

When solutions of 2-hydroxyphenazine (1), 3-hydroxyacridine (2), and 7-hydroxyquinoline (3) were irradiated with UV light at 77 K, they became deeply colored. The color of the solutions reverted to the original one, when they were left in the dark at 77 K or at a higher temperature. We ascribe the photochromism to proton tautomerization, which is most likely induced by an intermolecular proton transfer in the excited state.

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© 2003 The Chemical Society of Japan
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