Polyether-Functionalized Comb-Shaped Alkali Ionic Liquid Polymers for Knoevenagel Condensations

IF 3.9 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Langmuir Pub Date : 2025-08-17 DOI:10.1021/acs.langmuir.5c02322

Qin Wu*, Ming Chang, Wei Wang, Yingfang Guo, Jing Chen, Weijiao Li, Daxin Shi, Yaoyuan Zhang, Kangcheng Chen and Hansheng Li*,

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引用次数: 0

Abstract

Comb-shaped ionic liquid polymers P[VB(EG)_nIm][OH] (n = 0, 2, 3, 4) with varying polymerization degrees of polyether groups were successfully synthesized and characterized by FTIR, NMR, and ESI-MS. The Knoevenagel condensation reaction was selected as a model reaction to evaluate their catalytic performances. The influence of the polymerization degree of polyether groups on catalytic activity was studied. The results indicated that higher catalytic activity was obtained with increasing polymerization degree, owing to the enhancement of surface activity and the high local center activity concentration of the ionic liquid polymers. Among these ionic liquid polymers, P[VB(EG)₄Im][OH] exhibited the best catalytic performance owing to the OH anion, higher surface activity, and easy formation of hydrogen bonds with active centers. Using P[VB(EG)₄Im][OH] as the catalyst, the influence of solvent types on the catalysis effect was investigated. When dimethyl sulfoxide was used as the solvent, 97.6% yield was achieved because of its higher polarity and higher compatibility with reactants.

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聚醚功能化梳状碱离子液体聚合物用于Knoevenagel缩聚。

成功合成了聚醚基团聚合度不同的梳状离子液体聚合物P[VB(EG)nIm][OH] (n = 0,2,3,4)，并用FTIR、NMR和ESI-MS对其进行了表征。选择Knoevenagel缩合反应作为模型反应，评价其催化性能。研究了聚醚基团聚合度对催化活性的影响。结果表明，随着聚合度的增加，离子液体聚合物的表面活性增强，局部中心活性浓度较高，从而获得较高的催化活性。在这些离子液体聚合物中，P[VB(EG)4Im][OH]由于其阴离子OH、较高的表面活性和易于形成具有活性中心的氢键而表现出最好的催化性能。以P[VB(EG)4Im][OH]为催化剂，考察了溶剂类型对催化效果的影响。以二甲基亚砜为溶剂，由于其极性高，与反应物相容性好，收率可达97.6%。

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来源期刊

Langmuir 化学-材料科学：综合

CiteScore

6.50

自引率

10.30%

发文量

1464

审稿时长

2.1 months

期刊介绍： Langmuir is an interdisciplinary journal publishing articles in the following subject categories: Colloids: surfactants and self-assembly, dispersions, emulsions, foams Interfaces: adsorption, reactions, films, forces Biological Interfaces: biocolloids, biomolecular and biomimetic materials Materials: nano- and mesostructured materials, polymers, gels, liquid crystals Electrochemistry: interfacial charge transfer, charge transport, electrocatalysis, electrokinetic phenomena, bioelectrochemistry Devices and Applications: sensors, fluidics, patterning, catalysis, photonic crystals However, when high-impact, original work is submitted that does not fit within the above categories, decisions to accept or decline such papers will be based on one criteria: What Would Irving Do? Langmuir ranks #2 in citations out of 136 journals in the category of Physical Chemistry with 113,157 total citations. The journal received an Impact Factor of 4.384*. This journal is also indexed in the categories of Materials Science (ranked #1) and Multidisciplinary Chemistry (ranked #5).