吡啶基希夫碱作为Zn2+化学传感器:实验和理论研究†

IF 2.5 3区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY
Priyamvada Kumari, Narayan Sahoo, Neha Kumari, Minati Baral and Arun Kumar Padhy
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引用次数: 0

摘要

通过简单的一步缩合反应合成了一种新型juloliddine衍生的希夫碱(L1),并对其作为荧光化学传感器的潜力进行了评价。在乙醇介质中,L1对Zn2+离子表现出特殊的选择性和敏感性,显示出“开启”的荧光响应,其发射蓝移显著,荧光强度增强12倍。结合机理通过DFT计算,堆叠核磁共振波谱和Job图分析进行了研究。ESIPT的抑制和CHEF通路的激活证实了所提出的感知机制。该工艺加上分子刚性的增加,也使荧光量子产率从0.00174提高到0.00230。测定了Zn2+的结合常数为1.57 × 107 M−1,检出限为1.61 μM, DFT结果与实验吸收数据吻合较好。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Julolidine-based Schiff's base as a Zn2+ chemosensor: experimental and theoretical study†

Julolidine-based Schiff's base as a Zn2+ chemosensor: experimental and theoretical study†

A novel julolidine-derived Schiff base (L1) was synthesized through a facile one-step condensation reaction and evaluated for its potential as a fluorescent chemosensor. L1 exhibited exceptional selectivity and sensitivity toward Zn2+ ions in an ethanolic medium, displaying a ‘turn-on’ fluorescence response with a significant blue shift in emission and a 12-fold enhancement in fluorescence intensity. The binding mechanism was investigated via DFT calculations, stacked NMR spectroscopy, and Job's plot analysis. The inhibition of ESIPT and the activation of CHEF pathways confirmed the proposed sensing mechanism. This process, coupled with increased molecular rigidity, also enhanced the fluorescence quantum yield from 0.00174 to 0.00230. The binding constant and detection limit for Zn2+ were determined to be 1.57 × 107 M−1 and 1.61 μM, respectively, with the DFT results aligning closely with experimental absorption data.

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来源期刊
New Journal of Chemistry
New Journal of Chemistry 化学-化学综合
CiteScore
5.30
自引率
6.10%
发文量
1832
审稿时长
2 months
期刊介绍: A journal for new directions in chemistry
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