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

Sunita Joshi; Santosh Kumari; Eduardo Chamorro; Debi D. Pant; Rajeev Sakhuja

doi:10.1002/slct.201600383

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

Sunita Joshi, Santosh Kumari, Eduardo Chamorro, Debi D. Pant, Rajeev Sakhuja

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

Abstract

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 × 10⁴ M⁻¹ and 208 nM respectively. The high sensitivity of the sensor toward picric acid can be predominantly attributed to the ground-state charge-transfer complex formation based on UV-visible studies, time resolved fluorescence results and Density Functional Theory (DFT) calculations.

Original language	English
Pages (from-to)	1756-1762
Number of pages	7
Journal	ChemistrySelect
Volume	1
Issue number	8
DOIs	https://doi.org/10.1002/slct.201600383
Publication status	Published - 1 Jan 2016

Keywords

DFT calculations
fluorescence
picric acid
Sensors
water

ASJC Scopus subject areas

General Chemistry

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10.1002/slct.201600383

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title = "Fluorescence Quenching of a Benzimidazolium–based Probe for Selective Detection of Picric Acid in Aqueous Medium",

abstract = "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 KSV=1.58 × 104 M−1 and 208 nM respectively. The high sensitivity of the sensor toward picric acid can be predominantly attributed to the ground-state charge-transfer complex formation based on UV-visible studies, time resolved fluorescence results and Density Functional Theory (DFT) calculations.",

keywords = "DFT calculations, fluorescence, picric acid, Sensors, water",

author = "Sunita Joshi and Santosh Kumari and Eduardo Chamorro and Pant, {Debi D.} and Rajeev Sakhuja",

note = "Funding Information: The authors acknowledge the Department of Science & Technology (DST), New Delhi, for research funding (SB/FT/CS-033/ 2012). SK is thankful to University Grants Commission (UGC), New Delhi for Senior Research Fellowship. EC acknowledges the continuos support from FONDECYT (Chile), grant 1140343, the Millennium Nucleus of Chemical Processes and Catalysis (CPC), grantNC120082, and the UNAB grant DI-806-15/R.“",

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doi = "10.1002/slct.201600383",

language = "English",

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pages = "1756--1762",

journal = "ChemistrySelect",

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AU - Joshi, Sunita

AU - Kumari, Santosh

AU - Chamorro, Eduardo

AU - Pant, Debi D.

AU - Sakhuja, Rajeev

N1 - Funding Information: The authors acknowledge the Department of Science & Technology (DST), New Delhi, for research funding (SB/FT/CS-033/ 2012). SK is thankful to University Grants Commission (UGC), New Delhi for Senior Research Fellowship. EC acknowledges the continuos support from FONDECYT (Chile), grant 1140343, the Millennium Nucleus of Chemical Processes and Catalysis (CPC), grantNC120082, and the UNAB grant DI-806-15/R.“

PY - 2016/1/1

Y1 - 2016/1/1

N2 - 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 KSV=1.58 × 104 M−1 and 208 nM respectively. The high sensitivity of the sensor toward picric acid can be predominantly attributed to the ground-state charge-transfer complex formation based on UV-visible studies, time resolved fluorescence results and Density Functional Theory (DFT) calculations.

AB - 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 KSV=1.58 × 104 M−1 and 208 nM respectively. The high sensitivity of the sensor toward picric acid can be predominantly attributed to the ground-state charge-transfer complex formation based on UV-visible studies, time resolved fluorescence results and Density Functional Theory (DFT) calculations.

KW - DFT calculations

KW - fluorescence

KW - picric acid

KW - Sensors

KW - water

UR - http://www.scopus.com/inward/record.url?scp=85020912969&partnerID=8YFLogxK

U2 - 10.1002/slct.201600383

DO - 10.1002/slct.201600383

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SN - 2365-6549

VL - 1

SP - 1756

EP - 1762

JO - ChemistrySelect

JF - ChemistrySelect

IS - 8

ER -

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

Abstract

Keywords

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