Unsymmetrical dyes derived from 7,8‐dihydrobenzo[c,d]furo[2,3‐f]indole |
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| Authors: | Iryna G. Davydenko Aleksei D. Kachkovsky Marina L. Dekhtyar Yurii L. Slominskii Aleksei I. Tolmachev |
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| Affiliation: | Institute of Organic Chemistry, National Academy of Sciences of Ukraine, Murmanskaya Str. 5, Kiev‐02094, Ukraine |
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| Abstract: | On the basis of the 7,8‐dihydrobenzo[c,d]furo[2,3‐f]indole nucleus, a number of unsymmetrical carbocyanines as well as styryl dyes have been synthesized and their absorption spectra have been measured. Starting from the deviations of long‐wavelength maxima, the value of electron‐donor ability D has been estimated for the heterocycle under study and a number of dye end groups have been ranked by their electron‐donor properties. Experimental inferences are supported by the quantum chemically calculated bond length alternations and energy levels for the dyes concerned. Copyright © 2009 John Wiley & Sons, Ltd. |
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| Keywords: | 7,8‐Dihydrobenzo[c,d]furo[2,3‐f]indole deviation electron‐donor ability of heterocycles polymethine dyes styryl dyes |
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