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    • A new class of efficient 4-[(nitro substituted-phenyl)-hydrazonomethyl]- 1-phenyl-1H-pyrazole-3-carboxylate derived colorimetric chemosensor for selective sensing of fluoride and other biologically important anions

      SUMAN SWAMI ARUNAVA AGARWALA BABITA MALIK RAHUL SHRIVASTAVA

      Regular Article Volume 128 Issue 9 September 2016 pp 1451-1457

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/jcsc/128/09/1451-1457

    • Keywords

       

      Pyrazole; receptor; sensor; anions; fluoride ion.

    • Abstract

       

      A new class of efficient colorimetric chemosensors derived from 4-[(nitro substituted-phenyl)-hydrazonomethyl]-1-phenyl-1H-pyrazole-3-carboxylate have been synthesized and characterized. The synthesized receptors exhibit instant color change from yellow to dark purple along with significant bathochromicshifts when interacted with fluoride ions. The UV-Visible and ¹H NMR titration experiments revealed that 4-[(4-nitro-phenyl)-hydrazonomethyl]-1-phenyl-1H-pyrazole-3-carboxylate derivatives showed selective sensing of fluoride ions in preference to Cl⁻, Br⁻, I⁻, PF⁻⁻, HSO₄⁻, ClO₄⁻ , CH₃COO⁻ and H₂PO₄⁻ ions while 4-[2,4-dinitro-phenyl)-hydrazonomethyl]-1-phenyl-1H-pyrazole-3-carboxylate derivatives showed sensing of acetate, dihydrogen phosphate ion and fluoride ion in organic media.

    • Author Affiliations

       

      SUMAN SWAMI ARUNAVA AGARWALA BABITA MALIK RAHUL SHRIVASTAVA

      1. Dates

         
        Published
        1 September 2016
        Manuscript received
        20 April 2016
        Manuscript revised
        11 July 2016
        Accepted
        11 July 2016

      2. Supplementary Material

         

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