HTS/FTIR investigations in the spectral range 4000–600 cm−1 and BET method of specific surface area of various montmorillonite clays modified by monocationic and dicationic imidazolium ionic liquids

IF 2.4 3区化学 Q4 CHEMISTRY, PHYSICAL

Chemical Physics Pub Date : 2025-07-07 DOI:10.1016/j.chemphys.2025.112844

A. Ahmed , W.A.A. Ahmed , T. Moumene , El H. Belarbi , V. Baeten , S. Bresson

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Abstract

Three different types of montmorillonite, K10, KSF, and SWy-3, were analyzed using HTS/FTIR spectroscopy. The HTS/FTIR spectra revealed two spectral regions (3800–2600, 2000–1000 cm⁻¹), highlighting the vibrational signatures that differentiate the three types of clays. The vibrational study of the three types of clays modified with two ionic liquids ([EMIM⁺][I⁻] monocationic ionic liquid and [M(CH₂)IM²⁺][2I⁻] dicationic ionic liquid) revealed several vibrational changes directly related to the presence of the ionic liquids in the clays. On one hand, the transition from monocationic to dicationic ionic liquids intercalated into the clay structure significantly affected the HTS/FTIR spectra. On the other hand, the HTS/FTIR spectra of SWy-3 show more significant vibrational changes than those of the other two clays after the intercalation of ionic liquids. To complement these results, a study of the specific surface area of these clays and these clays modified by the [M(CH₂)IM²⁺][2I⁻] dicationic ionic liquid using the BET method is presented.

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HTS/FTIR在4000 ~ 600 cm−1光谱范围内的研究和BET方法对不同蒙脱土的比表面积进行了单离子和双离子咪唑离子液体改性

利用HTS/FTIR光谱对K10、KSF和SWy-3三种不同类型的蒙脱土进行了分析。HTS/FTIR光谱显示了两个光谱区域（3800 - 2600,2000 - 1000 cm−1），突出了区分三种类型粘土的振动特征。对两种离子液体（[EMIM+][I−]单阳离子离子液体和[M（CH₂）IM2+][2I−]双阳离子离子液体）改性的三种粘土进行了振动研究，揭示了几种与离子液体在粘土中的存在直接相关的振动变化。一方面，插入粘土结构的离子液体从单离子向双离子转变显著影响了HTS/FTIR光谱。另一方面，插入离子液体后，SWy-3的HTS/FTIR光谱表现出比其他两种粘土更显著的振动变化。为了补充这些结果，用BET方法研究了这些粘土和由[M（CH₂）IM2+][2I−]指示离子液体修饰的粘土的比表面积。

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来源期刊

Chemical Physics 化学-物理：原子、分子和化学物理

CiteScore

4.60

自引率

4.30%

发文量

278

审稿时长

39 days

期刊介绍： Chemical Physics publishes experimental and theoretical papers on all aspects of chemical physics. In this journal, experiments are related to theory, and in turn theoretical papers are related to present or future experiments. Subjects covered include: spectroscopy and molecular structure, interacting systems, relaxation phenomena, biological systems, materials, fundamental problems in molecular reactivity, molecular quantum theory and statistical mechanics. Computational chemistry studies of routine character are not appropriate for this journal.