Fluorescence Quenching of a Benzimidazolium-based Probe for Selective Detection of Picric Acid in Aqueous Medium

被引：22

作者：

Joshi, Sunita ^{[1
]}

Kumari, Santosh ^{[2
]}

Chamorro, Eduardo ^{[3
]}

Pant, Debi D. ^{[4
]}

Sakhuja, Rajeev ^{[2
]}

机构：

[1] Charles Univ Prague, Dept Pathophysiol, Prague, Czech Republic

[2] Birla Inst Technol & Sci, Dept Chem, Pilani 333031, Rajasthan, India

[3] Univ Andres Bello, Millennium Nucleus Chem Proc & Catalysis CPC, Fac Ciencias Exactas, Dept Ciencias Quim, Ave Republ 275, Santiago 830146, Chile

[4] Birla Inst Technol & Sci, Dept Phys, Pilani 333031, Rajasthan, India

来源：

CHEMISTRYSELECT | 2016年 / 1卷 / 08期

关键词：

Sensors; picric acid; fluorescence; DFT calculations; water; AGGREGATION-INDUCED EMISSION; METAL-ORGANIC FRAMEWORK; NITROAROMATIC EXPLOSIVES; IRIDIUM(III) COMPLEX; CHEMICAL SENSORS; DIPOLE-MOMENT; CHEMOSENSORS; DERIVATIVES; POLYMERS; 2,4,6-TRINITROPHENOL;

D O I：

10.1002/slct.201600383

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A fluorescent coumaryl linked benzimidazolium salt has been synthesized, characterized and found to be highly selective for nanomolar detection of commonly used explosive picric acid, over other aromatic explosives in aqueous medium. The quenching constant and detection limit of the sensor for picric acid was found to be K-SV= 1.58 x 10(4) M-1 and 208 nM respectively. The high sensitivity of the sensor toward picric acid can be predominantly attributed to the ground-state chargetransfer complex formation based on UV-visible studies, time resolved fluorescence results and Density Functional Theory (DFT) calculations.

引用

页码：1756 / 1762

页数：7

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