A highly selective Cd2+ sensor of naphthyridine: fluorescent enhancement and red-shift by the synergistic action of forming binuclear complex

Abstract A new series of fluorophore derivatives from 1,8-naphthyridine have been developed. Compound D1 is the first naphthyridine PET sensor that can signal Cd 2+ selectively with fluorescent enhancement and red-shift. A binuclear complex structure has been demonstrated in the D1–Cd 2+ complex.

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