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基于氨基酸离子液体和硅胶的高效选择性CO复合吸附剂：¹H NMR光谱揭示CO结合机制及孔内微观粘度

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.

作者信息

Sheshkovas Andrey Z, Khudozhitkov Alexander E, Veselovskaya Janna V, Kolokolov Daniil I, Stepanov Alexander G, Ludwig Ralf

机构信息

Boreskov Institute of Catalysis, Novosibirsk, Ac. Lavrentiev av. 5, Novosibirsk, 630090, Russia.

Universität Rostock, Institut für Chemie, Abteilung für Physikalische Chemie, Albert-Einstein-Straße 27, 18059, Rostock, Germany.

出版信息

ChemSusChem. 2025 Mar 3;18(5):e202401736. doi: 10.1002/cssc.202401736. Epub 2024 Nov 13.

DOI:10.1002/cssc.202401736
PMID:39401288
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11874630/
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.

摘要

一种基于[Emim][Gly]（1-乙基-3-甲基咪唑鎓甘氨酸盐）/硅胶复合材料的新型一氧化碳吸附剂已被研究。一氧化碳吸附实验表明，硅胶中[Emim][Gly]离子液体的最佳负载量为40 wt.%。基于吸附实验、核磁共振氢谱（H NMR）光谱和从头算计算结果，提出了[Emim][Gly]中两步法一氧化碳结合机制。深入研究了一氧化碳对离子液体微观粘度和动态熔化的影响。核磁共振氢谱（H NMR）光谱显示，一氧化碳在[Emim][Gly]中强烈结合阳离子和阴离子，迫使它们以相关方式移动。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/56c9/11874630/15917b302d15/CSSC-18-e202401736-g004.jpg
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