Water-soluble
BOPAHY fluorophores have not yet been reported. The
potential of 1,2,3-triazolium salts for the formation of water-soluble
chromophores is explored. 1,2,3-Triazole-substituted pyrroles were
synthesized in a metal-free pathway and alkylated to obtain water-soluble
1,2,3-triazolium BOPAHY dyes. High fluorescence quantum yields were
observed for triazole-bridged BOPAHY dyes in DCM and moderate fluorescence
quantum yields for 1,2,3-triazolium-bridged BOPAHY chromophores in
DCM and water. The fluorescence of the freely rotatable 1,2,3-triazolium-linked
BOPAHYs is partially quenched in water.
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