An AIE active imidazole conjugated α-cyanostilbene based sensor for the selective and sensitive detection of picric acid in an aqueous medium

IF 6.5 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY Sensors and Actuators Reports Pub Date : 2023-10-14 DOI:10.1016/j.snr.2023.100177

Selin Manoj Kumar, Sathiyanarayanan Kulathu Iyer

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引用次数: 1

Abstract

Due to increasing pollution threats, terrorism-sensitive rapid sensing of aromatic nitro explosives (picric acid) has gained predominant significance in environmental safety. Herein, imidazole-derived monofunctional fluorescent sensor 2-(4-aminophenyl)-3-(3-(4,5-diphenyl-1H-imidazol-2-yl)-2-hydroxyphenyl) acrylonitrile (ADHA) was successfully developed for the selective recognition of explosive picric acid. The D-π-A configuration of ADHA facilitates extraordinary photophysical properties with remarkable aggregation-induced emission (AIE). The detection process is induced by the photon-induced electron transfer (PET) and resonance energy transfer (RET) and results in the generation of ADHA+PA complex. The structural relationship and the photophysical properties of ADHA were extensively studied by DFT (Density Functional Theory) methods and spectroscopic analysis. It has been calculated that the detection limit of the formed complex is 6.26 nM. In addition, ¹H NMR titrations DFT calculations, and HRMS analysis were performed to understand the detection mechanism better. Test strip-aided detection and invisible ink applications confirmed that ADHA is a versatile sensor for sensitively detecting picric acid without sophisticated instruments. In addition, ADHA was implemented to detect PA in real water samples with remarkable recovery.

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基于AIE活性咪唑偶联α-氰二苯乙烯的苦味酸传感器的选择性灵敏检测

随着污染威胁的日益增加，芳香硝基炸药(苦味酸)的恐怖敏感快速传感在环境安全领域具有重要意义。本文成功研制了咪唑类单功能荧光传感器2-(4-氨基苯基)-3-(3-(4,5-二苯基- 1h -咪唑-2-基)-2-羟基苯基)丙烯腈(ADHA)，用于炸药苦味酸的选择性识别。ADHA的D-π-A结构具有优异的光物理性质，具有显著的聚集诱导发射(AIE)。检测过程由光子诱导电子转移(PET)和共振能量转移(RET)诱导，产生ADHA+PA络合物。利用DFT(密度泛函理论)方法和光谱分析对ADHA的结构关系和光物理性质进行了广泛的研究。计算出所形成的配合物的检出限为6.26 nM。此外，通过1H NMR滴定、DFT计算和HRMS分析来更好地了解检测机制。测试条辅助检测和隐形墨水的应用证实，ADHA是一种多功能传感器，无需复杂的仪器即可灵敏地检测苦味酸。此外，采用ADHA检测实际水样中的PA，回收率显著。

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Sensors and Actuators Reports Multiple-

CiteScore

9.60

自引率

0.00%

发文量

审稿时长

49 days

期刊介绍： Sensors and Actuators Reports is a peer-reviewed open access journal launched out from the Sensors and Actuators journal family. Sensors and Actuators Reports is dedicated to publishing new and original works in the field of all type of sensors and actuators, including bio-, chemical-, physical-, and nano- sensors and actuators, which demonstrates significant progress beyond the current state of the art. The journal regularly publishes original research papers, reviews, and short communications. For research papers and short communications, the journal aims to publish the new and original work supported by experimental results and as such purely theoretical works are not accepted.