Add time:08/27/2019         Source:sciencedirect.com

An anthracene-based diamidine (1) ‘turn-on’ fluorescent probe for the detection of dicarboxylic acids has been designed and synthesized. The fluorescence spectra of the diamidine 1 with carboxylic acids that showed two different fluorescence bands, which corresponded to the amidinium–carboxylate (λem=430–440 nm), and amidinium (λem=460–470 nm as a broad band) formation, were confirmed by DOSY NMR and TD-DFT calculations. These different fluorescence bands showed the binding mode of carboxylic acids and the stability of formed complexes toward diamidine 1. The fluorescent detection of amidinium–carboxylate formation using diamidine 1 was applicable to the detection of α,ω-dicarboxylic acids (C6–C13) and succeeded in the detection of α,ω-dicarboxylic acid (adipic acid) in human urine.

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