Ionic Liquid Functionalized Chitosan Catalyst with Optimized Hydrophilic/Hydrophobic Structural Balance for Efficient CO2 Fixation. Issue 6 (26th May 2022)

• Record Type: Journal Article
• Authors: Paliwal, Khushboo S.; Biswas, Tanmoy; Mitra, Antarip; Tudu, Gouri; Mahalingam, Venkataramanan
• Is Part Of: Asian journal of organic chemistry. Volume 11:Issue 6(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-05-26
• Subjects: Carbon dioxide -- Chitosan -- Cycloaddition -- Hydrophobic/hydrophilic -- Ionic liquid; Chemistry, Organic -- Periodicals; Organic compounds -- Synthesis -- Periodicals; 547.005
• DOI: 10.1002/ajoc.202200121
• Languages: English
• ISSNs: 2193-5807

Abstract

Abstract: In this work a series of chitosan‐based catalysts with ranging hydrophobic/hydrophilic balance are successfully prepared by varying the ionic liquid and hydrocarbon chain length attached to chitosan. The chitosan modified with eight carbon units displayed efficient catalytic activity for the conversion of a wide range of epoxides to their corresponding cyclic carbonates under 1 atmosphere pressure of carbon dioxide without cocatalyst and solvent. The optimized catalyst was able to convert even diepoxides and sterically bulky epoxides like t‐butyl glycidyl ether to their corresponding cyclic carbonates. This study provides an insight into catalyst designing based on possible molecular interaction between reactants and active sites of the catalyst. Abstract : Ionic liquid functionalized chitosan with optimized hydrophilic/hydrophobic structural balance was utilized to perform epoxide to cyclic carbonate conversion reaction using CO2 as a C1 feedstock. Modification of pyridine grafted chitosan with octyl group has provided highest efficiency for the conversion of range of epoxide into respective cyclic carbonates at atmospheric pressure of CO2 in solvent‐free medium.