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    Mechanistic Insight into Selective Sensing of Hazardous Hg2+ and Explosive Picric Acid by Using a Pyrene-Azine-Hydroxyquinoline Framework in Differential Media

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    Type
    Article
    Authors
    Mondal, Tapashree
    Mondal, Indranil
    Biswas, Sourav
    Mane, Manoj Vasisht cc
    Panja, Sujit S. cc
    KAUST Department
    KAUST Catalysis Center (KCC)
    Physical Science and Engineering (PSE) Division
    Date
    2020-08-11
    Online Publication Date
    2020-08-11
    Print Publication Date
    2020-08-14
    Embargo End Date
    2021-08-12
    Submitted Date
    2020-05-02
    Permanent link to this record
    http://hdl.handle.net/10754/664650
    
    Metadata
    Show full item record
    Abstract
    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 Hg2+ ions in ethanol/H2O (9 : 1,v/v) medium with detection limit of 0.22 μM and binding constant of 1.09 x 103 M−1. The detail scrutiny of mechanism of interaction between PHQ and Hg2+ is rationalized through various techniques like 1H 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 fluorescent PHQ hydrosol 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 104 M−1 with high quenching efficiency of 84% increases the pertinency of the nano-probe.
    Citation
    Mondal, T., Mondal, I., Biswas, S., Mane, M. V., & Panja, S. S. (2020). Mechanistic Insight into Selective Sensing of Hazardous Hg2+ and Explosive Picric Acid by Using a Pyrene-Azine-Hydroxyquinoline Framework in Differential Media. ChemistrySelect, 5(30), 9336–9349. doi:10.1002/slct.202001798
    Sponsors
    The authors gratefully acknowledge the financial support from DST-FIST (SR/FST/CSI-267/2015(C) dt. 13. 07. 2016) for providing the infrastructural facility in the department. TM acknowledges the financial assistance from NIT Durgapur. SSP also acknowledge the financial support from DST-SERB (EMR/2016/001230 dt.15. 03. 2017). IICB, Kolkata, India for the HR-MS analysis and IBS, Daejeon, Republic of Korea for the 1H NMR spectral analysis are sincerely acknowledged.
    Publisher
    Wiley
    Journal
    ChemistrySelect
    DOI
    10.1002/slct.202001798
    Additional Links
    https://onlinelibrary.wiley.com/doi/abs/10.1002/slct.202001798
    ae974a485f413a2113503eed53cd6c53
    10.1002/slct.202001798
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; KAUST Catalysis Center (KCC)

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