Bifunctional Imidazolium-Based Ionic Liquid Decorated UiO-67 Type MOF for Selective CO₂ Adsorption and Catalytic Property for CO₂ Cycloaddition with Epoxides

Abstract

A bifunctional robust and highly porous imidazolium-based ionic liquid decorated UiO-67 type MOF (UiO-67-IL, 1) was successfully constructed via solvothermal assembly of the imidazolium-based ligand and Zr(IV) ions. It exhibits a highly selective adsorption for CO over CH and N. Furthermore, 1 herein can be used as a highly active heterogeneous catalyst for CO cycloaddition with epoxides under atmospheric pressure with or without cocatalyst TBAB (n-BuNBr).

Ionic Liquid/Metal–Organic Framework Composites: From Synthesis to Applications

“…[60] Single-component gas adsorption isotherms (CH 4 ,C O 2 ,a nd N 2 )w eree xperimentally and computationally measured for 4, 20, and 28 wt %I Ll oaded composite materials. [74] CO 2 uptake for IL/UiO-67 (22.4 cm 3 g À1 )w as found to be the same as that of pristine UiO-67 (named after Universitetet iO slo;U iO) (22.9 cm 3 g À1 )w hereas the CH 4 and N 2 uptakes were much lower than that of pristine UiO-67. DQ st values elucidated that the change in Q st of CO 2 with IL incorporation was more apparent compared with other gases, resultingi ne nhanced CO 2 selectivities.…”

“…[74] The pure IL/MOF composite showedp oor catalytic efficiency (3 %c ycloaddition yield) at room temperature in a4 8hreaction, therefore it was used with ac o-catalyst, TBAB( tetrabutylammonium bromide), at differentr eaction temperatures and times. [74] The pure IL/MOF composite showedp oor catalytic efficiency (3 %c ycloaddition yield) at room temperature in a4 8hreaction, therefore it was used with ac o-catalyst, TBAB( tetrabutylammonium bromide), at differentr eaction temperatures and times.…”

Ionic‐Liquid‐Functionalized UiO‐66 Framework: An Experimental and Theoretical Study on the Cycloaddition of CO2 and Epoxides

“…[21][22][23][24] Ionic liquids( ILs), [25] that is, salts comprising an organic cation and inorganic anion, have gained prominence in the field of catalysis due to their elite physicochemical properties such as meltingp oint, immiscibility with organic solvents, liquid state at room temperature,n onvolatility even at high temperature, viscosity,a nd structural versatility with various functional groups. [38][39][40][41] Recently,t he developmento fI L/metal-organic framework (IL@MOF) heterogeneous catalyst systemsh as attracted much attention owing to the ability of these systemsf or CO 2 capture and conversion. [28][29][30][31][32][33][34][35][36][37] In the liquid-phase reactions, leaching of the IL reduces the reactivity and stability of the material.…”

“…[41][42][43][44][45][46] Herein,w er eport the fabrication of two new IL-tethered Zr-based UiO-66-NH 2 heterogeneous catalysts by ap ostimpregnation methodw herein the ILs are incorporated into MOFs after their preparation.T he resulting heterogeneous catalysts werea pplied in the cycloaddition of epoxides and CO 2 . Thus far,I Ls have been incorporated in MOFs by ionothermal synthesis, wet impregnation, capillary action, post-impregnation, ship-in-bottle and bottlearound-ship methods, direct ligand functionalization, and so forth.…”

Chemical Synthesis and Characterization of Pd/SiO2: The Effect of Chemical Reagent

“…where Q is the columbic charge (µC) for the COads oxidation, the columbic charge required to complete CO monolayer oxidation at the Pd surface is equal to 420 µC·cm −2 (the same as for Pt surfaces) [47], and G is the Pd loading (g) on the working electrode [48]. According to CO-stripping data, the peak around 1.1 V (vs. RHE) for Pd/SiO 2 samples corresponds to the oxidation of a CO monolayer.…”