Thermal stability limits of imidazolium, piperidinium, pyridinium, and pyrrolidinium ionic liquids immobilized on metal oxides

Ionic Liquid Sheath Stabilizes Atomically Dispersed Reduced Graphene Aerogel‐Supported Iridium Complexes during Ethylene Hydrogenation Catalysis

“…Then, the temperature was increased to 600 °C at a rate of 10 °C/min, with the sample in flowing N 2 . The differential thermogravimetric curve was used to analyze the thermal stability limit of [EMIM][OAc] to avoid any overestimation of the thermal stability, as described in detail elsewhere [18] …”

“…The differential thermogravimetric curve was used to analyze the thermal stability limit of [EMIM][OAc] to avoid any overestimation of the thermal stability, as described in detail elsewhere. [18] Infrared (IR) spectroscopy: A Bruker Vertex 80v spectrometer with a spectral resolution of 2 cm À 1 was used in transmission mode. For each measurement, approximately 3 mg of solid sample was pressed between two KBr windows in the Ar-filled glovebox.…”

A novel ionic liquid immobilized on FSM-16: a novel recoverable nanocatalyst for the synthesis of biscoumarin derivatives

“…[1][2][3] They have attracted increasing attention as an alternative reaction medium due to their unique properties such as tunable acidity, selective solubility, very low viscosity, negligible vapor pressure, high thermal stability, and ease of product separation. 4,5 Despite these promising advantages, ionic liquids have suffered from some disadvantages that have prevented them from being widely used in practice, including high cost, intolerable viscosity, cumbersome product purification, and long reaction times. 6,7 Immobilization of ionic liquids on solid supports is one of the most efficient ways to overcome the above-mentioned drawbacks.…”

Studies on the Stability and Deactivation Mechanism of Immobilized Ionic Liquids in Catalytic Esterification Reactions

“…As we know, the Brønsted acidity of an immobilized ionic liquid comes from the protons of anions (e.g., HSO 4 – and H 2 PO 4 – ) or functional groups of cations (e.g., −SO 3 H and −CO 2 H). − Due to the positive charge of cations, many ionic liquid cations may tend to be deprotonated and result in the dissociation of protons in functional groups. Unfortunately, the releasable proton may be able to bond with an anion to form a free molecule, which will leach out into the solvent.…”