Photochemistry of a 6′‐cyanosubstituted spironaphthooxazine: photo‐induced decay of an open form |
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| Authors: | Marina I Nikolaeva Valeri V Korolev Elena A Pritchina Evgeni M Glebov Victor F Plyusnin Anatoly V Metelitsa Nikolai A Voloshin Vladimir I Minkin |
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| Institution: | 1. Boreskov Institute of Catalysis SB RAS, Novosibirsk 630090, Russian Federation;2. Institute of Chemical Kinetics and Combustion SB RAS, Novosibirsk 630090, Russian Federation;3. Novosibirsk State University, Novosibirsk 630090, Russian Federation;4. Institute of Physical and Organic Chemistry, Southern Federal University, Rostov on Don 344104, Russian Federation |
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| Abstract: | Photochemistry of three 6′‐cyanosubstituted spironaphthooxazines (SNO) in ethanol matrices at 77 K was studied by means of ultraviolet (UV) and erythrocyte sedimentation rate (ESR) spectroscopy and quantum chemistry. The quantum yield of the open form photolysis is found to be 0.01–0.02, which is high enough for 77 K. For one of the SNO, the formation of a merocyanine form radical was observed. The radicals were formed by an H atom abstraction from the solvent molecule to the light‐excited merocyanine isomers. The formation of a merocyanine radical represents a new specific channel of photochemically induced degradation of spirooxazines. Copyright © 2011 John Wiley & Sons, Ltd. |
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| Keywords: | frozen matrices photochemistry photochromism quantum chemistry spirooxazines |
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