J Phys Chem Lett
Laboratoire de Chimie, Ecole Normale Superieure de Lyon and CNRS, F-69364 Lyon, France.
Published: January 2024
Intermolecular interactions in ionic liquids are mainly governed by Coulombic forces. Attraction between cations has been previously observed and was attributed to dispersion interactions between nonpolar moieties, hydrogen bonding, or π stacking. In this study, we present the intriguing behavior of tetracyanoborate anions in ionic liquids that, unlike their dicyanamide and tricyanomethanide counterparts, form dimers in both solid and liquid phases. A joint simulation and experimental study uncovers the origin of such anion-anion attraction: stabilization by induction and dispersion forces between several cyano groups, which is strong enough to overcome electrostatic repulsion. These findings open up new opportunities in the rational design of ionic liquids, where interactions between ions of the same charge can be controlled and fine-tuned by the presence of cyano groups.
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http://dx.doi.org/10.1021/acs.jpclett.3c02983 | DOI Listing |
Int J Mol Sci
December 2024
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China.
α-Hydroxy ketones are a crucial class of organic compounds prevalent in natural products and pharmaceutical molecules. The CO-promoted hydration of propargylic alcohols is an efficient method for the synthesis of α-hydroxy ketones. Herein, an ionic liquid (IL) was designed to catalyze this reaction individually under atmospheric CO pressure, volatile organic solvents, and additives.
View Article and Find Full Text PDFMaterials (Basel)
December 2024
Faculty of Civil Engineering, Mechanics and Petrochemistry, Warsaw University of Technology, 09-400 Płock, Poland.
This article compares the rheological and tribological properties of three ionic liquids: Tributyl(methyl)phosphonium dimethyl phosphate 97%-MFCD, 1-Butyl-3-methylimidazolium hexafluorophosphate 97%-BMIMPF6, and 1-Butyl-3-methylimidazolium tetrafluoroborate 98%-BMIMBF4. Their density and kinematic viscosity at 20 °C and 40 °C were investigated, and tribological tests were carried out at the same temperatures with ball-on-disc contact. The test materials were made of 100Cr6 steel.
View Article and Find Full Text PDFMolecules
December 2024
State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
The efficient removal of dyes is of significant importance for environmental purification and human health. In this study, a novel material (Si-MPTS-IL) has been synthesized by the immobilization of imidazole ionic liquids (ILs) onto nano-silica using the radiation grafting technique. The adsorption performance of Si-MPTS-IL for Coomassie Brilliant Blue (CBB) removal is studied by a series of static adsorption experiments.
View Article and Find Full Text PDFJ Colloid Interface Sci
January 2025
State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012 PR China. Electronic address:
Polyelectrolytes have shown promise as sensitive material for high-performance humidity sensors in recent years. How to obtain fast recovery and high sensitivity polyelectrolyte humidity sensors is a great challenge. A kind of poly(ionic liquid)s (PILs) humidity sensors modified by zwitterionic polymers (partially zwitterionic PILs, named PZPILs) were prepared in this work.
View Article and Find Full Text PDFInt J Biol Macromol
January 2025
Institute of Bast Fiber Crops & Center of Southern Economic Crops, Chinese Academy of Agricultural Sciences, Changsha 410205, China. Electronic address:
Membranes have been used as versatile tools for the separation of various natural products; however, the selective separation of structural analogs of natural products using membranes remains challenging. In this study, biocomposite membranes based on poly(ionic liquids) and different natural fibers (jute, cotton, or wool) were successfully prepared. Natural fibers can regulate the microstructure and improve the mechanical properties of membranes.
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