Dyes and Pigments (2020)
Update date:2022-08-24
Topics:
Fang, Hu
Qu, Wen-Juan
Yang, Hao-Hang
He, Jun-Xia
Yao, Hong
Lin, Qi
Wei, Tai-Bao
Zhang, You-Ming
In this work, we constructed a supramolecular gel (PN-G) by phenazine derivative, which can ultrasensitive detect cyanide (detection limit equals to 4.18 × 10?10 M). The decrease of fluorescent intensity displayed a linear relationship in the range of 0–0.4 equivalents of cyanide. And no significant fluorescence quenching was observed for all used interfering ions. The cyanide recognition mechanism of PN-G was verified by XRD, NMR, MS and SEM. With addition of cyanide to the supramolecular gel (PN-G), cyanide broken π-π stacking of PN-G, and then PN-G undergoes a nucleophilic addition reaction with CN?, resulting in fluorescence quenched.
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