| Femtogram Detection of Explosive Nitroaromatics: Fluoranthene-Based Fluorescent Chemosensors. | |
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MedLine Citation:
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PMID: 23015532 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Herein we report a novel fluoranthene-based fluorescent fluorophore 7,10-bis(4-bromophenyl)-8,9-bis[4-(hexyloxy)phenyl]fluoranthene (S(3) ) and its remarkable properties in applications of explosive detection. The sensitivity towards the detection of nitroaromatics (NACs) was evaluated through fluorescence quenching in solution, vapor, and contact mode approaches. The contact mode approach using thin-layer silica chromatograp- hic plates exhibited a femtogram (1.15 fg cm(-2) ) detection limit for trinitrotoluene (TNT) and picric acid (PA), whereas the solution-phase quenching showed PA detection at the 2-20 ppb level. Fluorescence lifetime measurements revealed that the quenching is static in nature and the quenching process is fully reversible. Binding energies between model binding sites of the S(3) and analyte compounds reveal that analyte molecules enter into the cavity created by substituted phenyl rings of fluoranthene and are stabilized by strong intermolecular interactions with alkyl chains. It is anticipated that the sensor S(3) could be a promising material for the construction of portable optical devices for the detection of onsite explosive nitroaromatics. |
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Authors:
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N Venkatramaiah; Shiv Kumar; Satish Patil |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-9-27 |
Journal Detail:
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Title: Chemistry (Weinheim an der Bergstrasse, Germany) Volume: - ISSN: 1521-3765 ISO Abbreviation: Chemistry Publication Date: 2012 Sep |
Date Detail:
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Created Date: 2012-9-27 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9513783 Medline TA: Chemistry Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. |
Affiliation:
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Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560012 (India), Tel: (+91) 80-22932651, Fax: (+91) 80-23601310. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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