Silica gel functionalized with imidazolium group via click chemistry – new stationary phase for ion chromatography

Abstract

This manuscript describes the preparation of a simple effective ion-exchange material based on silica gel, on the surface of which methylimidazolium bromide is fixed using a click reaction. The resulting material was used as a stationary phase for the separation and determination of Cl–, NO2–, NO3–, I–, and SO42– using ion exchange chromatography. The separation efficiency and retention factors for the selected anions were studied in the pH range 3.5–6.5. The proposed material was used for the determination of Cl–, SO42– in water and can be suggested for successful use in real water samples.

Imidazolium-Modified Silica Gel for Highly Selective Preconcentration of Ag(I) from the Nitric Acid Medium

“…Currently, there is growing interest in the preparation of such materials based on different forms of silica [31][32][33][34]. Covalent immobilization of ionic liquids is often carried out on the surface of commercially available pre-functionalized silica gels to obtain new stationary chromatographic phases for the separation of amino acid mixtures and different organic and inorganic anions [35][36][37][38].…”