摘要

A selective and sensitive turn-on fluorescent NIR probe for cysteine has been developed. Cleavage of 2,4-dinitrobenzene-sulfonyl (DNBS) with thiols switches the weakly fluorescent aza-BODIPY dye (lambda(em) = 734 nm, Phi(f) = 0.03) to a strongly fluorescent species in the NIR region (lambda(em) = 755 nm, Phi(f) = 0.14).