• Investigation of hybrid molecular material prepared by ionic liquid and polyoxometalate anion

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      https://www.ias.ac.in/article/fulltext/jcsc/120/06/0587-0594

    • Keywords

       

      1-Butyl 3-methyl imidazolium bromide; molecular material; phosphotungstic acid; near IR.

    • Abstract

       

      A solid hybrid molecular material containing 1-butyl 3-methyl imidazolium cations and Keggin anions of phosphotungstic acid has been synthesized. It is fully characterized by CHN analysis, FTIR, XRD, UV-Vis-NIR DRS, 31P MAS NMR, TGA and SEM. The FTIR spectrum of the compound shows the fingerprint vibrational bands of both Keggin molecular anions and imidazolium cations. The aromatic C-H stretch region (2700-3250 cm-1) of imidazolium cation is split due to the interaction between the ring C-H and bulky Keggin anion. The red-shift in the UV-Vis spectra and the downfield 31P MAS NMR chemical shift also confirm the electrostatic interaction between the ions in the compound. Near IR spectral region (1000-2500 nm) shows the elimination of water in the compound which is hydrophobic.

    • Author Affiliations

       

      T Rajkumar1 G Ranga Rao1

      1. Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036
    • Dates

       
  • Journal of Chemical Sciences | News

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