B-containing ionic liquid modified SBA-15 for CO2-epoxide coupling reaction metal-free catalysis

Yifei Ye; Yuanyuan Cui; Li Yang; Jiaxu Zhang; Jianmin Sun

doi:10.1016/j.jcis.2024.11.015

B-containing ionic liquid modified SBA-15 for CO₂-epoxide coupling reaction metal-free catalysis

J Colloid Interface Sci. 2024 Nov 5;680(Pt A):596-607. doi: 10.1016/j.jcis.2024.11.015. Online ahead of print.

Authors

Yifei Ye¹, Yuanyuan Cui², Li Yang³, Jiaxu Zhang⁴, Jianmin Sun⁵

Affiliations

¹ Xinjiang Key Laboratory of Clean Conversion and High ValueUtilization of Biomass Resources, School of Chemistry and Chemical Engineering, Yili Normal University, China; State Key Laboratory of Urban Water Resource and Environment, MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150080, China.
² State Key Laboratory of Urban Water Resource and Environment, MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150080, China.
³ Xinjiang Key Laboratory of Clean Conversion and High ValueUtilization of Biomass Resources, School of Chemistry and Chemical Engineering, Yili Normal University, China; State Key Laboratory of Urban Water Resource and Environment, MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150080, China. Electronic address: [email protected].
⁴ Xinjiang Key Laboratory of Clean Conversion and High ValueUtilization of Biomass Resources, School of Chemistry and Chemical Engineering, Yili Normal University, China; State Key Laboratory of Urban Water Resource and Environment, MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150080, China. Electronic address: [email protected].
⁵ State Key Laboratory of Urban Water Resource and Environment, MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150080, China. Electronic address: [email protected].

PMID: 39531878
DOI: 10.1016/j.jcis.2024.11.015

Abstract

A novel external-skeleton B-containing ionic liquid modified SBA-15 catalyst BBN-Imi-SBA-15-I (BBN denotes borabicyclo[3.3.1]nonane, Imi represents imidazolium ionic liquid) was successfully constructed by a post-modification method for efficiently catalyzing CO₂-epoxide coupling reaction under both metal- and solvent-free conditions. 5BBN-Imi-SBA-15-I (5 refers to the molar ratio of Si to B), thanks to its synergistic effects of Lewis acid, weak base sites from tertiary amine and quaternary ammonium, hydrogen bond group and nucleophilic group, displayed good catalytic activity with 97 % product yield and 99 % selectivity at 100 °C, 2 MPa in the absence of cocatalyst. The obtained catalyst demonstrated good recyclability during six consecutive catalytic runs, also presented generality for various mono-substitute epoxides. Through in-situ NH₃ diffuse reflectance infrared Fourier transform spectroscopy (NH₃-DRIFTS) characterization, the Lewis acidity of organo-boron was verified. Besides, kinetics research also proved the positive effect of multiple active components on efficient catalysis under milder conditions over SiO₂-based metal-free catalysts.

Keywords: B-containing IL; CO(2)-epoxide coupling reaction; Cyclic carbonate synthesis; Metal-free catalysis; SBA-15.