Abstract:Two fluorophores
bound with a short photoreactive bridge are fascinating
structures and remained unexplored. To investigate the synthesis and
photolysis of such dyes, we linked two rhodamine dyes via a diazoketone
bridge (−COCN
2
−) attached to position 5′
or 6′ of the pendant phenyl rings. For that, the mixture of
5′- or 6′-bromo derivatives of the parent dye was prepared,
transformed into 1,2-diarylacetylenes, hydrated to 1,2-diarylethanones,
and converted to diazoketones Ar
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