Preparation, AIE and ESIPT behaviour, controllable solid-state fluorescence and application of Co²⁺probe based onα-cyanostilbene.

IF 2.4 3区化学 Q3 CHEMISTRY, ANALYTICAL

Methods and Applications in Fluorescence Pub Date : 2022-11-25 DOI:10.1088/2050-6120/aca378

Meihui Chen, Wenheng Huang, Yangping Li, Yongchun Chen, Dan Ji, Mingguang Zhu

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引用次数: 1

Abstract

A simpleα-cyanostilbene-functioned salicylaldehyde-based Schiff-base probe, which exhibited outstanding 'aggregation-induced emission and excited state intramolecular proton transfer (AIE + ESIPT)' emission in solution, aggregation and solid states, was synthesized in high yield of 87%. Its solid-states with different morphologies emitted different fluorescence after crystallization in EtOH/H₂O (1/2, v/v) mixtures or pure EtOH solvent. Besides, it exhibited an obvious spectro-photometrical fluorescence quenching for highly selective sensing of Co²⁺in THF/water system (ƒ_w= 60%, pH = 7.4), accompanied by an intense green fluorescence turn-off behavior under UV_365nmillumination. The binding stochiometry between the ligand and Co²⁺was found to be 2:1, and the detection limit (DL) was calculated to be 0.41 × 10^-8M. In addition, it could be applied to detect Co²⁺in real water samples and on silica gel testing strip.

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基于α-氰二苯乙烯的Co2+探针的制备、AIE和ESIPT行为、可控固态荧光及应用。

合成了一种简单的α-氰基二苯乙烯水杨醛基希夫碱探针，该探针在溶液态、聚集态和固态下均表现出明显的“聚集诱导发射”和“激发态质子转移(AIE + ESIPT)”发射，产率高达87%。在EtOH/H2O (1/2, v/v)混合物或纯EtOH溶剂中，不同形态的固态结晶后发出不同的荧光。此外，在THF/水体系(ƒw= 60%， pH = 7.4)中，该材料表现出明显的荧光猝灭特性，对Co2+具有高选择性感应，并在uv365nm光照下表现出强烈的绿色荧光关闭行为。配体与Co2+的结合配比为2:1，检出限(DL)为0.41 × 10-8M。此外，该方法还可用于实际水样中的Co2+检测和硅胶测试条上的Co2+检测。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Methods and Applications in Fluorescence CHEMISTRY, ANALYTICALCHEMISTRY, PHYSICAL&n-CHEMISTRY, PHYSICAL

CiteScore

6.20

自引率

3.10%

发文量

期刊介绍： Methods and Applications in Fluorescence focuses on new developments in fluorescence spectroscopy, imaging, microscopy, fluorescent probes, labels and (nano)materials. It will feature both methods and advanced (bio)applications and accepts original research articles, reviews and technical notes.