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ul. Novatorov, 119421 Moscow, Russian Federation. New indoline spiropyrans of the coumarin series were synthesized by the condensation of indoline and hydroxyformylcoumarin derivatives. Spiropyrans, viz., derivatives of 8 formyl 7 hydroxy 4 methylcoumarin and 5 formyl 6 hydroxy 4 methylcoumarin, under irradiation are transformed into open forms, which are recyclized in the dark. The compounds formed by the condensation of the indoline derivatives with 3 formyl 4 hydroxycoumarin have an open structure of the merocyanine dyes and are transformed into spiro forms neither in the dark nor under irradiation with the visible light.

For some photochromic compounds (58 diarylethenes and 9 fulgimides), the results of our spectral and kinetic studies are presented. Aiming at targeted synthesis of new photochromic compounds, the structure – photochromic behavior relationship (SPBR) for the synthesized compounds has been analyzed. The perspectives for application of these compounds in development of recording media for use in optical memory devices are outlined. Copyright © 2007 John Wiley & Sons, Ltd.

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