Synthesis of photochromic dyes based on annulated coumarin systems

NM Cerqueira, AMF Oliveira??Campos…

Index: Cerqueira, Nuno M. F. S. A.; Oliveira-Campos, Ana M. F.; Coelho, Paulo J.; Melo De Carvalho, Luis H.; Samat, Andre; Guglielmetti, Robert Helvetica Chimica Acta, 2002 , vol. 85, # 2 p. 442 - 450

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Citation Number: 24

Abstract

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.