Infrared spectroscopic study of absorption and separation of CO using copper(i)-containing ionic liquids

Abstract

Reversible formation of copper(i) carbonyl complexes from copper-containing ionic liquids is probed directly using in situ high pressure IR spectroscopy.

The use of metal–organic frameworks for CO purification

“…[34][35][36] A spectroscopic study by Repper et al investigated CO absorption and separation using in situ infrared spectroscopy, although this technique was unable to measure CO capacity. 37 The 1-hexyl-3-methylimidazolium (hmim) dibromocuprate(I) ionic liquid proved to be best performing, recording 89% and 95% CO purity for 1:1 CO/H2 and CO/N2 mixtures respectively, both experiments being performed at 25 °C and 8 bar.…”

Oxygen-deficient photostable Cu2O for enhanced visible light photocatalytic activity

“…We overcome the synthesis challenge associated with stable phase-pure Cu 2 O nanoparticles via addressing the wellknown problem of the instability of inorganic Cu(I) salts in water due to the higher lattice and solvation energies for the Cu 1+ ion over those of Cu 2+ ions. 24 As such, this problem typically results in the rapid disproportionation of Cu 1+ ions into Cu 2+ and Cu 0 in an aqueous environment as per eqn (1): 25 2Cu þ ! Cu 2þ þ Cu 0 ð1Þ…”

Carbon monoxide separation: past, present and future

“…Using these ILs the solubility, stability, or environmental issues of COSORB could be resolved. 43,[141][142][143][144] Other than ILs being used solely as a solvent for complexes, ILs that intrinsically, selectively absorb CO are also being developed. 145,146 This journal is © The Royal Society of Chemistry 2023 Chem.…”