Design of Phosphonated Imidazolium-Based Ionic Liquids Grafted on γ-Alumina: Potential Model for Hybrid Membranes

Abstract

Imidazolium bromide-based ionic liquids bearing phosphonyl groups on the cationic part were synthesized and grafted on γ-alumina (γ-Al2O3) powders. These powders were prepared as companion samples of conventional mesoporous γ-alumina membranes, in order to favor a possible transfer of the results to supported membrane materials, which could be used for CO2 separation applications. Effective grafting was demonstrated using energy dispersive X-ray spectrometry (EDX), N2 adsorption measurements, fourier transform infrared spectroscopy (FTIR), and special attention was paid to 31P and 13C solid state nuclear magnetic resonance spectroscopy (NMR).

Alkyl-imidazolium based organosilica supported Fe/porphyrin complex: As novel, highly efficient and reusable catalyst for the unsymmetrical Hantzsch reaction

“…This image also illustrated nano-spaces between the particles which are very good places for successful immobilization and adsorption of different chemical compounds. The X-ray diffraction (XRD) analysis also demonstrated a broad peak between 2 theta of 20-40 degree that is characteristic of wellorganized organosilica materials ( Figure 7) [36].…”

Controlled grafting of dialkylphosphonate-based ionic liquids on γ-alumina: design of hybrid materials with high potential for CO2 separation applications

“…3,4,10,11 In our previous studies we demonstrated that g-alumina can be graed with two imidazolium bromide-based ionic liquids bearing phosphonyl groups on the cationic part (either dialkyl or bis(trimethylsilyl)ester phosphonate) under specic reaction conditions. 15 The graing process was found to be timedependent and the possible formation of bulk aluminum phosphonate phases was avoided. In the conclusion of this study, the applied reaction conditions with the dialkylphosphonate-based IL ([ImPE][Br]) were found to be the most promising route for graing the surface of g-alumina supports.…”

“…In the conclusion of this study, the applied reaction conditions with the dialkylphosphonate-based IL ([ImPE][Br]) were found to be the most promising route for graing the surface of g-alumina supports. 15 In this work, the following four ILs were studied ( to be promising coupling agents for CO 2 transport applications. As shown in Fig.…”

Probing Structures of Interfacial 1-Butyl-3-Methylimidazolium Trifluoromethanesulfonate Ionic Liquid on Nano-Aluminum Oxide Surfaces Using High-Pressure Infrared Spectroscopy

“…Aluminum oxide, commonly called alumina, has tremendous applications in ceramics, medical products, and catalysis, to name a few [1][2][3][4][5][6]. Despite the expanding number of applications for aluminum oxide, the physical arrangement and interactions of liquids at Al 2 O 3 surfaces remains poorly understood.…”

“…In this way, changes in band frequencies and intensities may be used to infer changes in the local structures of the ions. Many spectroscopic studies on ionic liquid interactions with nanostructured metal oxides focus on changing the temperature of the composite or varying the molecular structure of the ionic liquid in contact with the solid (e.g., lengthening the alkyl side chain) to probe the interfacial interactions [1][2][3][4][5][6][7][8][9]. Hydrostatic pressure is another degree of freedom that can continuously tune the structures, interactions, and solvation of chemical systems.…”