Immobilized metal ion-containing ionic liquids: Preparation, structure and catalytic performances in Kharasch addition reaction and Suzuki cross-coupling reactions

Selective decomposition of cyclohexyl hydroperoxide by copper ion-containing quaternary ammonium salts in alkali-free medium

“…It has been reported that these bands are characteristic absorption of the inorganic sheets of corner-sharing copper chloride octahedral sandwiched with organic layers. [19][20][21][22] This indicated that copper chloride was introduced to hexadecyl trimethyl ammonium chloride (HTAC) via the formation of four-coordinated CuCl 4 2− complex.…”

Preparation of copper (II) ion-containing bisimidazolium ionic liquid bridged periodic mesoporous organosilica and the catalytic decomposition of cyclohexyl hydroperoxide

“…Both the samples show absorption bands at 220 nm, which was ascribed to imidazolium cation. Besides this band, for Cu-BIM-PMO it shows two other peaks at 290 and 400 nm, which were assigned to the CuCl 4 2− species [19,24,29]. It could be deduced that the copper ion was introduced to the materials via the formation of CuCl 4 2− complex.…”

“…Immobilization of ionic liquids is an efficient way to overcome these problems. Post-graft method was utilized to introduce metal ion-containing ionic liquids on the surface of the solid materials [24][25][26]. But for the grafted ionic liquids, it also has some drawbacks, such as leaching of active component from the support and the low loading of the ionic liquids [23].…”

Oxidative carbonylation of methanol over copper ion-containing ionic liquids immobilized on SBA-15

“…Hence, it is highly desirable to develop a heterogeneous catalytic system with similar catalytic performance to that of those homogeneous ionic liquid-meditated copper salt catalysts but using less amount of ionic liquids. Recently, several studies have investigated using metal ion-containing imidazole ionic liquid-modified silica for the design of catalysts for Kharasch addition reaction and Suzuki cross-coupling reactions [19,20]. SBA-15 with tunable uniform hexagonal channels ranging from 5 to 30 nm and thick framework walls (3-6 nm), is a better support due to its high hydrothermal stability and substantial larger pore sizes.…”