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Spectrochim Acta A Mol Biomol Spectrosc. 2019 Jun 3;222:117209. doi: 10.1016/j.saa.2019.117209. [Epub ahead of print]

A highly sensitive and selective fluorescent "off-on-off" relay chemosensor based on a new bis(salamo)-type tetraoxime for detecting Zn2+ and CN.

Author information

1
School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu 730070, China.
2
School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu 730070, China. Electronic address: dongwk@126.com.

Abstract

A new naphthalenediol-based bis(salamo)-type fluorescent probe H4L for Zn2+ and CN- was reported. Probe H4L showed a highly selective fluorescence enhancement toward Zn2+ over other metal ions including Cd2+, and obtained the L-Zn2+complex can only detect CN- in various anions. Their recognition mechanisms were explained by Job plots, fluorescent and UV-vis titrations, and theoretical calculations. The L-Zn2+complex has been synthesized and structurally characterized using Hirshfeld surface analysis, elemental analyses, IR, UV-Vis and fluorescent spectra. Additionally, the relay probe with the wide adaptability of pH range and excellent stability showed highly selectivity for CN- recognition.

KEYWORDS:

Bis(salamo)-type fluorescent probe; Hirshfeld surface analysis; Recognition mechanism; Relay recognition; Theoretical calculation

PMID:
31200268
DOI:
10.1016/j.saa.2019.117209

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