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Indranil, Mondal
나노물질 및 화학반응 연구단
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Mechanistic Insight into Selective Sensing of Hazardous Hg(2+)and Explosive Picric Acid by Using a Pyrene-Azine-Hydroxyquinoline Framework in Differential Media

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Title
Mechanistic Insight into Selective Sensing of Hazardous Hg(2+)and Explosive Picric Acid by Using a Pyrene-Azine-Hydroxyquinoline Framework in Differential Media
Author(s)
Tapashree Mondal; Indranil Mondal; Sourav Biswas; Manoj V. Mane; Sujit S. Panja
Subject
Aggregation, ; Explosive sensor, ; Fluorescence quenching dynamics, ; Hg(2+)sensor, ; Time resolved photoluminescence
Publication Date
2020-08
Journal
ChemistrySelect, v.5, no.30, pp.9336 - 9349
Publisher
WILEY-V C H VERLAG GMBH
Abstract
© 2020 Wiley-VCH GmbH. A pyrene-hydroxyquinoline tethered ingeniously designed and developed azine based Schiff base luminophoric system, 2-((Z)-((E)-(pyren-1-ylmethylene)hydrazono)methyl)quinolin-8-ol (PHQ) has been explored as a selective 'TURN ON' chromofluorogenic sensor for hazardous Hg(2+)ions in ethanol/H2O (9 : 1,v/v) medium with detection limit of 0.22 mu M and binding constant of 1.09 x 10(3) M-1. The detail scrutiny of mechanism of interaction betweenPHQand Hg(2+)is rationalized through various techniques like(1)H NMR titration, FT-IR, mass spectral analysis, theoretical computations, Job's plot, dynamic light scattering (DLS), transmission electron microscopy (TEM), time resolved excited state decay dynamics and fluorescence reversibility studies, which concretely declare a synergistic effect of supramolecular aggregation induced enhanced emission and deactivation of photo-induced electron transfer (PET) processes. On the other hand, a 'TURN OFF' luminescence feature of highly fluorescentPHQhydrosol is utilized for the selective screening of powerful explosive picric acid (PA) in aqueous medium and mechanism is deciphered by means of steady state, time-resolved emission as well as computational studies which altogether reflect a combined effect of PET and ground state complexation between probe and PA. The commendable detection limit of 55 nM and Stern-Volmer quenching constant of 1.48 x 10(4) M(-1)with high quenching efficiency of 84% increases the pertinency of the nano-probe
URI
https://pr.ibs.re.kr/handle/8788114/7687
DOI
10.1002/slct.202001798
ISSN
2365-6549
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > 1. Journal Papers (저널논문)
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