Photochromic properties of indoline spiropyrans of the coumarin series |
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| Authors: | V A Barachevsky R E Karpov O V Venidiktova T M Valova Yu P Strokach V S Miroshnikov T A Chibisova V F Traven |
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| Institution: | (1) Photochemistry Center, Russian Academy of Sciences, 7a ul. Novatorov, 119421 Moscow, Russian Federation;(2) D. I. Mendeleev Chemical Technological University, 9 Miusskaya pl., 125047 Moscow, Russian Federation |
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| Abstract: | The photochromic properties and aggregation processes of merocyanine forms of indoline spiropyrans of the coumarin series
in solutions were studied by spectral and kinetic methods. Photochromism of the compounds synthesized depends on their structure.
The efficient formation of J-aggregates was found for indoline spiropyrans 1a,b under UV irradiation and merocyanines 3a,b, which is indicated by the appearance of absorption and fluorescence bands in the visible spectral region and the resonance
character of fluorescence.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 10, pp. 2350–2356, October, 2005. |
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| Keywords: | spiropyrans indole coumarin derivatives photochromic transformations spiran form merocyanine form |
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