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

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., Feng, X., & 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
• 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