Synthesis and spectroscopic properties of 2-ketopyrrole–BF2 complexes: a new class of fluorescent dye
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The 2-ketopyrrole complexes 3 and 4 were isolated as minor products in syntheses of the corresponding 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY®) dyes 1 and 2. Compounds 4 were shown to be highly fluorescent having emissions between 504 and 544 nm with quantum yields between 0.52 and 0.89. (C) 2000 Elsevier Science Ltd.
author list (cited authors)
Chen, J., Burghart, A., Wan, C., Thai, L., Ortiz, C., Reibenspies, J., & Burgess, K.