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Synthesis of photochromic dyes based on annulated coumarin systems

Helvetica Chimica Acta (2002) 85(2) 442-450
DOI: 10.1002/1522-2675(200202)85:2<442::AID-HLCA442>3.0.CO;2-9
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Abstract

Novel 2H-chromenes derived from hydroxycoumarins were synthesized, and their photochromic behaviour was studied under flash-photolysis conditions, showing a wide absorption range in the visible region. All the compounds exhibit low fluorescence, which apparently has no negative effect on their photochromic properties.

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Cerqueira, N. M. F. S. A., Oliveira-Campos, A. M. F., Coelho, P. J., Melo De Carvalho, L. H., Samat, A., & Guglielmetti, R. (2002). Synthesis of photochromic dyes based on annulated coumarin systems. Helvetica Chimica Acta, 85(2), 442–450. https://doi.org/10.1002/1522-2675(200202)85:2<442::AID-HLCA442>3.0.CO;2-9

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