π-Conjugated Porous Polymer Nanosheets for Explosive Sensing: Investigation on the Role of H-Bonding.

IF 3.5 3区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Chemistry - An Asian Journal Pub Date : 2024-10-02 DOI:10.1002/asia.202400939

Saurabh Kumar Rajput, Atul Kapoor, Abhishek Yogi, Venkateswarlu Yarlagadda, Venkata Suresh Mothika

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引用次数: 0

Abstract

Nitroaromatic explosive sensing plays a critical role in ensuring public security and environmental protection. Herein, we report 2-pyridyl-thiazolothiazole (pyTTz) integrated blue-fluorescent π-conjugated porous polymer nanosheets, NTzCMP and TzCMP for selective sensing of picric acid (PA) among nitrophenol explosives. Acid-base interactions between PA and pyTTz of CMP lead to H-bonding interactions, where the hydroxy group of PA engaged in weak H-bonding interactions with pyridine and TTz of pyTTz moiety. This led to a strong fluorescence quenching of CMPs-such formation of ground state complex was supported by linear Stern-Volmer quenching plots, unaltered excited state lifetimes, and detailed FTIR analysis of PA exposed CMPs. Interestingly, both CMPs exhibited an excellent response to smaller analytes such as o-nitrotoluene compared to 2,4-dinitrotoluene. Both NTzCMP and TzCMP CMPs exhibited high K_SV values of 9×10³ and 2.1×10³ M^-1 for PA and the corresponding limit of detection values were found to be 0.46 and 1.6 ppm, respectively.

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用于爆炸传感的π共轭多孔聚合物纳米片：关于 H 键作用的研究。

硝基芳香族爆炸物传感在确保公共安全和环境保护方面发挥着至关重要的作用。在此，我们报告了 2-吡啶基-噻唑并噻唑（pyTTz）集成蓝色荧光π共轭多孔聚合物纳米片 NTzCMP 和 TzCMP，用于选择性地感知硝基苯类爆炸物中的苦味酸（PA）。PA 与 CMP 的 pyTTz 之间的酸碱相互作用导致了 H 键相互作用，其中 PA 的羟基与 pyTTz 分子中的吡啶和 TTz 发生了微弱的 H 键相互作用。这导致了 CMP 的强烈荧光淬灭--线性 Stern-Volmer 淬灭图、未改变的激发态寿命以及对 PA 暴露的 CMP 进行的详细傅立叶变换红外分析都证明了基态复合物的形成。有趣的是，与缺电子的 2,4-二硝基甲苯相比，这两种 CMP 对较小的分析物（如邻硝基甲苯）都有很好的反应。NTzCMP 和 TzCMP CMP 对 PA 的 KSV 值分别高达 9×103 和 2.1×103 M-1，相应的检测限值分别为 0.46 和 1.6 ppm。

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

Chemistry - An Asian Journal 化学-化学综合

CiteScore

7.00

自引率

2.40%

发文量

535

审稿时长

1.3 months

期刊介绍： Chemistry—An Asian Journal is an international high-impact journal for chemistry in its broadest sense. The journal covers all aspects of chemistry from biochemistry through organic and inorganic chemistry to physical chemistry, including interdisciplinary topics. Chemistry—An Asian Journal publishes Full Papers, Communications, and Focus Reviews. A professional editorial team headed by Dr. Theresa Kueckmann and an Editorial Board (headed by Professor Susumu Kitagawa) ensure the highest quality of the peer-review process, the contents and the production of the journal. Chemistry—An Asian Journal is published on behalf of the Asian Chemical Editorial Society (ACES), an association of numerous Asian chemical societies, and supported by the Gesellschaft Deutscher Chemiker (GDCh, German Chemical Society), ChemPubSoc Europe, and the Federation of Asian Chemical Societies (FACS).