Abstract
A series of negative T-type nitrile-rich photochromes containing a hydroxytricyanopyrrole acceptor was synthesized. It was shown that thermal stability of the photoinduced form could be tuned by the replacement of a substituent in para-position to OH-group as well as by the change of a solvent. Ethanol solutions of the synthesized compounds showed significantly shorter half-lives of the reverse dark (thermal) reaction in comparison with solutions in acetonitrile.
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