Aggregation‐directed High Fidelity Sensing of Picric Acid by a Perylenediimide‐based Luminogen,Chemistry - An Asian Journal

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Aggregation‐directed High Fidelity Sensing of Picric Acid by a Perylenediimide‐based Luminogen
Chemistry - An Asian Journal ( IF 3.5 ) Pub Date : 2020-11-02 , DOI: 10.1002/asia.202001184
Bapan Pramanik _{1,

2} , Saurav Das ₁ , Debapratim Das ₁

Affiliation

Widespread use of picric acid (PA) in chemical industries and deadly explosives poses dreadful impact on all living creatures as well as the natural environment and has raised global concerns that necessitate the development of fast and efficient sensing platforms. To address this issue, herein, we report a perylenediimide‐peptide conjugate, PDI‐1, for detection of PA in methanol. The probe displays typical aggregation caused quenching (ACQ) behaviour and exhibits a fluorescence “turn‐off” sensory response towards PA which is unaffected by the presence of other interfering nitroaromatic compounds. The sensing mechanism involves PA induced aggregation of the probe into higher order tape like structures which leads to quenching of emission. The probe possesses a low detection limit of 5.6 nM or 1.28 ppb and a significantly high Stern‐Volmer constant of 6.87×10⁴ M⁻¹. It also exhibits conducting properties in the presence of PA vapours and thus represents a prospective candidate for vapour phase detection of PA. This is, to the best of our knowledge, the first example of a perylenediimide based probe that demonstrates extremely specific, selective and sensitive detection of PA and thus grasps the potential for application in practical scenarios.

中文翻译：

基于ylene二酰亚胺的发光剂对苦味酸的聚集定向高保真感测

苦味酸（PA）在化学工业和致命炸药中的广泛使用对所有生物以及自然环境造成了可怕的影响，并引起了全球范围的关注，因此有必要开发快速高效的传感平台。为了解决这个问题，我们在此报告了per二酰亚胺-肽共轭物PDI-1，用于检测甲醇中的PA。该探针显示出典型的聚集引起的猝灭（ACQ）行为，并表现出对PA的荧光“关闭”感觉响应，不受其他干扰性硝基芳香族化合物的影响。感测机制涉及PA诱导的探针聚集到更高阶的带状结构中，从而导致发射猝灭。该探针具有5.6 nM或1.28 ppb的低检测限和6.87×10 ⁴ M ^-1的很高的斯特恩-沃尔默常数。它在PA蒸汽存在下也表现出导电性能，因此代表了PA气相检测的潜在候选对象。据我们所知，这是基于per二酰亚胺的探针的第一个实例，该探针展示了PA的特异，选择性和灵敏检测，因此掌握了在实际场景中的应用潜力。

更新日期：2020-12-16

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