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COVER ARTICLE Kleij, Pescarmona et al. A highly active Zn(salphen) catalyst for production of organic carbonates in a green CO 2 medium 2044-4753(2012)2:11;1-B Downloaded on

Multilayered covalently supported ionic liquid phase (mlc-SILP) materials were synthesised by grafting\ud different bis-vinylimidazolium salts on thiol-functionalised silica. These materials, which contain a crosslinked\ud oligomeric network of imidazolium units, were characterised and tested as catalysts for the reaction\ud of carbon dioxide with various epoxides to produce cyclic carbonates. The materials prepared by\ud supporting a bis-imidazolium iodide salt with xylene or octane as a linker between the imidazolium\ud units were identified as the most active catalysts and displayed high turnover numbers and improved\ud productivity compared to known supported ionic liquid catalysts. The most promising mlc-SILP catalysts\ud were further studied to tune the reaction conditions towards optimum catalytic performance and to\ud investigate their versatility with different substrates and their reusability. The rapid and parallel screening\ud of the catalysts was efficiently carried out by means of high-throughput (HT) experimentation

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