Efficient Selective CO Composite Sorbent from Amino Acid Ionic Liquids and Silica Gel: H NMR Spectroscopy Provides Insight on the CO-Binding Mechanism and In-Pore Microscopic Viscosity

Overview

Journal ChemSusChem

Specialty Chemistry

Date 2024 Oct 14

PMID 39401288

Authors

Andrey Z Sheshkovas

Alexander E Khudozhitkov

Janna V Veselovskaya

Daniil I Kolokolov

Alexander G Stepanov

Ralf Ludwig

Affiliations

Soon will be listed here.

Abstract

A promising CO sorbent based on the [Emim][Gly] (1-ethyl-3-methylimidazolium glycinate)/silica gel composite has been studied. CO sorption experiments have shown that the optimum loading of [Emim][Gly] ionic liquid in silica gel is 40 wt.%. The 2-step process CO binding mechanism in [Emim][Gly] has been proposed based on the results of sorption experiments, H NMR spectroscopy and ab-initio calculations. The impact of CO on the microscopic viscosity and the dynamical melting of ionic liquid has been thoroughly investigated. H NMR spectroscopy has revealed that CO strongly binds cation and anion in [Emim][Gly], forcing them to move in a correlated fashion.

Citing Articles

Efficient Selective CO Composite Sorbent from Amino Acid Ionic Liquids and Silica Gel: H NMR Spectroscopy Provides Insight on the CO-Binding Mechanism and in-Pore Microscopic Viscosity.

Sheshkovas A, Khudozhitkov A, Veselovskaya J, Kolokolov D, Stepanov A, Ludwig R ChemSusChem. 2024; 18(5):e202401736.

PMID: 39401288 PMC: 11874630. DOI: 10.1002/cssc.202401736.

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