Tailoring the properties of boron-dipyrromethene dyes with acetylenic functions at the 2,6,8 and 4-B substitution positions.

[摘要]：Organic Pigments, Fluorescent Brighteners, and Photographic Substitution of B,B-difluoro-Bodipy with arylalkynyl residues at boron, at the pyrrolic core, or at the meso position provides unique tri-, tetra-, and pentasubstituted dyes. Substitution at the (pyrrolic) 2,6-positions provides substantial red shifts with quantum yields in the 40-90% range and excited-state lifetimes of 3-7 ns. On/off fluorescence switching can be produced by protonation of dibutylamino subunits.

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