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Abstract <p>Heterogeneous imidazolium chloroferrate-based catalysts (C1, C2 and C3) were synthesized by three different routes: С1 in three stages, by covalent binding of cation to the silica gel surface and subsequent formation of grafted chloroferrate; C2 in two stages by preliminary synthesis of imidazolium chloroferrate and its adsorption on silica gel; C3 in one stage in which the synthesis of ILs proceeds simultaneously with its adsorption on the support surface. The catalysts were characterized by various physical and chemical techniques and tested in thiophene, dibenzothiophene and pyridine oxidation with H<sub>2</sub>O<sub>2</sub>. Catalyst C1 was more active than C2 and stable in several successive cycles of the in thiophene reaction. The “one pot” synthesized C3 catalysts was the most active in this model process and showed a TOF value of 25 h<sup>−1</sup>.</p>

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Heterogenized Fe-Based Ionic Liquid Supported on Silica Gel for Oxidation of S- and N-Containing Compounds—Effect of Synthesis Route. SILC or SILP?

  • 期刊论文

  • 发表日期：

    2026年2月1日

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  • I. G. Tarkhanova,
  • K. I. Maslakov,
  • I. V. Minenkova,
  • A. V. Shabatin,
  • V. M. Zelikman,
  • A. K. Buryak

摘要

Abstract

Heterogeneous imidazolium chloroferrate-based catalysts (C1, C2 and C3) were synthesized by three different routes: С1 in three stages, by covalent binding of cation to the silica gel surface and subsequent formation of grafted chloroferrate; C2 in two stages by preliminary synthesis of imidazolium chloroferrate and its adsorption on silica gel; C3 in one stage in which the synthesis of ILs proceeds simultaneously with its adsorption on the support surface. The catalysts were characterized by various physical and chemical techniques and tested in thiophene, dibenzothiophene and pyridine oxidation with H2O2. Catalyst C1 was more active than C2 and stable in several successive cycles of the in thiophene reaction. The “one pot” synthesized C3 catalysts was the most active in this model process and showed a TOF value of 25 h−1.