Understanding ZIF‐8 Performance upon Gas Adsorption by Means of Inelastic Neutron Scattering

Abstract

Despite the vast number of publication dealing with ZIF‐8, the performance of this zeolitic MOF upon adsorption is still a matter of debate. The understanding of its adsorption properties its of great importance to define its potential in aplications such as gas separation, sensing and catalytic processes. Using inelastic neutron scattering (INS) upon exposure to different probe molecules we get further insight about the adsortion performance at cryogenic temperatures, including the possible swinging of the imidazolate linkers.

New insights into the breathing phenomenon in ZIF-4

“…4,5 This gate-opening is associated with the swinging of the imidazolate linkers above a given threshold pressure, and depends on the nature of the probe molecule. 6 On the contrary, a closely related ZIF with the same SOD topology, sharing the same metal atoms (Zn), the only difference being the nature of the ligand, i.e. benzimidazolate in the specific case of ZIF-7, gives rise to a completely different scenario.…”

Understanding the breathing phenomena in nano-ZIF-7 upon gas adsorption

“…N2 and CO does while Ar and O2 does not. 11 ZIF-7 is a closely related material to ZIF-8 sharing the same metal ion (Zn), the only difference being the nature of the ligand, i.e. benzimidazolate ligand (Zn(bIm)2) in the former case.…”

Selective Alcohol Electrooxidation by ZIF-8 Functionalized Pt/Carbon Catalyst

“…The size of pore windows is smaller than the kinetic diameter of all used alcohols. Nevertheless, the adsorption of these alcohols takes places because of the flexibility of the framework and linker rotational freedom . Vapor adsorption studies on ZIF-8 performed by Denayer and co-workers point out differences in adsorption behavior of hydrophobic hydrophilic alcohols. , Adsorption of hydrophobic alcohols, such as n -pentanol and n -butanol, starts at significantly lower pressures than the adsorption of more hydrophilic methanol and ethanol.…”