A Cu(ii)-MOF capable of fixing CO₂ from air and showing high capacity H₂ and CO₂ adsorption

Abstract

A porous Cu(ii)-MOF shows an adsorption of 6.6 wt% of H at 77 K and 62 bar and a very high 60 wt% of CO at 298 K and 32 bar. When air is bubbled into a suspension of the activated MOF in the presence of different epoxides at room temperature, the CO in air is readily converted into the corresponding cyclic carbonates.

Rational Stepwise Construction of Different Heterometallic–Organic Frameworks (HMOFs) for Highly Efficient CO2 Conversion

“…In addition, this reactioni so ne of the most effective and economical methodsf or manually fixing CO 2 . [19][20][21][22] Notably,M OFs with open metal centers and coordinatively unsaturated metal nodes can serve as Lewis acidic catalysts for cycloaddition reactions. [23,[30][31][32][33] It is clear that the co-existence of metal nodes (Lewis acid sites) and basic functional groups (nucleophilic halogen ions) has as ynergistic effect on CO 2 fixation, which is used to activatet he epoxides.…”

Ligand Functionalization in Zirconium‐Based Metal‐Organic Frameworks for Enhanced Carbon Dioxide Fixation

“…Based on the structure analysis of F‐NH 2 ‐Zr(H 2 L), CO 2 adsorption results, and previous reports, [ 16–32,53–55 ] the reaction of cycloaddition of CO 2 and SO to form SC is proposed to proceed via a cooperative catalytic mechanism. First, the unsaturated Zr sites and the ‐OH groups, which act as the Lewis acid sites and Brønsted acid sites, coordinate with the O atoms of SO, thus polarizing the ring of SO.…”

“…In recent years, metal‐organic frameworks (MOFs), which possess designable architectures and decorative pore surface, have attracted widespread attention for being applied as heterogenous catalysts in CO 2 conversion, especially in cycloaddition of CO 2 to form cyclic carbonates, [ 16–32 ] because many MOFs possess not only a relative high capacity for CO 2 adsorption, but also unsaturated metal sites that can be regarded as the Lewis acidic sites to trigger this cycloaddition reaction. However, due to the reversible nature of coordination bonds, the chemical stability of most MOFs is still inferior which restricts their practicalities in this field.…”

Benzotriazolium Ionic Liquid Immobilized on Periodic Mesoporous Organosilica as an Effective Reusable Catalyst for Chemical Fixation of CO2 into Cyclic Carbonates

“…[9,10] However, most of these systems often need solvents or homogeneous additives, high pressures and temperatures. Recently, considerable effort has been devoted to the development of efficient catalytic systems for the synthesis of cyclic carbonates such as nano-PDA/KI, [11] ZnI2/NEt3, [12] (Cp2TiCl2)/KI, [13] ZnCl2/Al2O3-TBAI, [14] Zn-SBA-15/KI, [15] metal complexes, [16][17][18][19] organocatalysts, [20][21][22] MOFs, [23][24][25] MgO/TBAB/Bu4NBr, [26] Bp-Zn@MA, [27] H-MFeSN, [28] and others. [29][30][31] In spite of their potential utility, however, most of them still have problems such as harsh reaction conditions, use of expensive reagents, cumbersome product isolation and catalyst reusability procedures.…”