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A turn-off fluorescent probe for the detection of Cu2+ based on a tetraphenylethylene-functionalized salicylaldehyde Schiff-base

Xie, Hai Fang; Yu, Chang Jin; Huang, Ya Li; Xu, Hong; Zhang, Qi Long; Sun, Xiao Hong; Feng, Xing; Redshaw, Carl

Authors

Hai Fang Xie

Chang Jin Yu

Ya Li Huang

Hong Xu

Qi Long Zhang

Xiao Hong Sun

Xing Feng

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Professor Carl Redshaw C.Redshaw@hull.ac.uk
Professor of Inorganic Materials Chemistry and REF Lead for Chemistry



Abstract

A non-planar tetraphenylethylene-functionalized salicylaldehyde Schiff-base fluorescent probe (TPE-An-Py) with aggregation-induced enhanced emission (AIEE) characteristics was synthesized via a classical Knoevenagel condensation reaction, and exhibited a high sensitivity towards copper ions in aqueous media with a "turn-off" fluorescence mechanism; the limit of detection is 2.36 × 10-7 mol L-1. Importantly, the coordination mode of the probe towards copper was further evaluated by UV-vis and NMR spectroscopy and a 1:2 stoichiometry was identified. A single crystal X-ray diffraction study confirmed the binding mode. In addition, the AIEE fluorescent probe can be applied to the detection of Cu2+ in practical samples with satisfactory recoveries in a range of 106-111% in lake water and 97-108% in tap water.

Citation

Xie, H. F., Yu, C. J., Huang, Y. L., Xu, H., Zhang, Q. L., Sun, X. H., …Redshaw, C. (2020). A turn-off fluorescent probe for the detection of Cu2+ based on a tetraphenylethylene-functionalized salicylaldehyde Schiff-base. Materials Chemistry Frontiers, 4(5), 1500-1506. https://doi.org/10.1039/c9qm00759h

Journal Article Type Article
Acceptance Date Mar 25, 2020
Online Publication Date Mar 26, 2020
Publication Date May 1, 2020
Deposit Date Mar 26, 2020
Publicly Available Date Mar 27, 2021
Journal Materials Chemistry Frontiers
Print ISSN 2052-1537
Electronic ISSN 2052-1537
Publisher Royal Society of Chemistry
Peer Reviewed Peer Reviewed
Volume 4
Issue 5
Pages 1500-1506
DOI https://doi.org/10.1039/c9qm00759h
Public URL https://hull-repository.worktribe.com/output/3481801
Publisher URL https://pubs.rsc.org/en/Content/ArticleLanding/2020/QM/C9QM00759H#!divAbstract
Additional Information : This document is Similarity Check deposited; : Supplementary Information; : Single-blind; : Received 13 December 2019; Accepted 25 March 2020; Accepted Manuscript published 26 March 2020

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