Journal
TETRAHEDRON LETTERS
Volume 49, Issue 23, Pages 3716-3721Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2008.04.039
Keywords
Bodipy dyes; acetylenic spacers; multi-branched; pyrene; energy transfer
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Multi-branched dyes were prepared using a convergent step-by-step procedure. The key dibutoxydiethynylphenyl spacing units were first linked to a difluoroboradipyrromethene (yellow fluorophore) dye via the pseudo-meso position and then selectively cross-coupled to a di-(4-phenyliodo)ethynylborodiisoindolomethene (red emitter via the boron). When ethynylpyrene units were connected at the periphery to the boron of the yellow emitter, efficient cascade singlet energy transfer events occurred from the pyrene to the yellow and to the red emitters. (C) 2008 Elsevier Ltd. All rights reserved.
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