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      https://www.ias.ac.in/article/fulltext/jcsc/132/0153

    • Keywords

       

      MCM-22; Cesium exchanged; Eugenol isomerisation; Palladium dispersion; Heck reaction

    • Abstract

       

      Alkali and alkaline earth metal ions (Na+, K+, Cs+, Mg2+) exchanged MCM-22 zeolites were prepared and subsequently palladium (2 wt.%; Pd) was dispersed on above exchanged MCM-22 zeolitematerials. All the MCM-22 materials were systematically characterized by FTIR, powder X-ray diffraction, N2 sorption analysis and temperature-programmed desorption (TPD) of CO2. The XRD pattern and FTIR data confirmed the existence of theMCM-22 framework structure even after exchanging bulkymetal ions and palladiumloading.TPDstudies using CO2 supports that the cesium and magnesium incorporated MCM-22 possess a strong and large number of basic sites. The alkali and alkaline-earth metal ions exchanged MCM-22 catalysts were explored forindustrially important eugenol isomerisation, whereas the palladium containingMCM-22 materials were utilised forHeck coupling reaction of styrene with iodobenzene. The Cs-MCM-22 showed the best activity for the eugenolisomerization with the isoeugenol yield of 76%. The Cs/Pd-MCM-22 was shown as promising heterogeneous catalyst forHeck coupling reaction of styrene with iodobenzene and yield 99%stilbene. For both isomerization and Heck coupling reaction, the catalysts retain their activities even after several runs

    • Author Affiliations

       

      P SAHU1 T V HARIPRIYA1 A SREENAVYA1 G V SHANBHAG2 A AUGUSTIN3 A SAKTHIVEL1

      1. Inorganic Materials and Heterogeneous Catalysis Laboratory, Department of Chemistry, School of Physical Sciences, Central University of Kerala, Kasaragod, Kerala 671 320, India
      2. Materials Science and Catalysis Division, Poornaprajna Institute of Scientific Research (PPISR), Bidalur Post, Devanahalli, Bengaluru, Karnataka 562 164, India
      3. Department of Chemistry, St. Joseph’s College, Trichy, Tamil Nadu, India
    • Dates

       
  • Journal of Chemical Sciences | News

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