Inorganic Chemistry Communications (2020)
Update date:2022-08-17
Topics:
Cui, Yanhong
Li, Yujin
Lin, Zhangqi
Niu, Wenjie
Tang, Xue
Zhou, Zichun
Quinolinecarboxamides based on coumarin derivatives were efficiently synthesized and the optical properties were investigated. Compound ZXQ substituted by the diethylamino group on 7-position of coumarin exhibited blue fluorescence (λem ≈ 470 nm) with a high fluorescence quantum yield of 0.92 in Toluene and showed “turn-off” fluorescence property for Al3+. Probe ZXQ formed the 2:1 complex with Al3+ and performed fluorescence quenching in MeCN/H2O (95:5), which exhibited good selectivity and sensitivity. In addition, the mechanism of binding and fluorescence quenching was illustrated by titration experiment, Job’ plot and DFT calculations.
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Doi:10.1021/jacs.7b08818
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(2021)