Microporous Manganese Formate:  A Simple Metal−Organic Porous Material with High Framework Stability and Highly Selective Gas Sorption Properties

Abstract

Novel microporous metal-organic framework material composed of Mn(II) and formate ions displays permanent porosity, high thermal stability, and size-selective gas sorption behavior. The framework is stable enough to maintain single crystallinity after the complete guest removal at 150 degrees C under a reduced pressure. Most importantly, it selectively adsorbs H2 and CO2 but not N2 and other gases with larger kinetic diameters, which appears to be due to the small aperture of the channels. Despite a moderate H2 storage capacity, which is however still higher than that of any zeolite, its H2 surface coverage is one of the highest among the known microporous materials. Thus this new zeolite-like material made of a simple organic building block may find useful applications in gas separation and sensor.

Wall-collision line broadening of molecular oxygen within nanoporous materials

“…Such materials have, for example, been used to investigate Anderson localization of light [1], line profiles of nano-confined positronium atom emission [2], random lasing [3], storage of hydrogen and carbon dioxide [4], and efficiency enhancements of solar cells [5,6]. However, determining the internal geometrical features, such as porosity and pore sizes, remains nontrivial.…”

Crystal structure of tri-(1,4-bis(imidazol-1-yl)butane)-cadmium(II) dihexafluorophosphate, {[Cd(bimb)3](PF6)2}n, C30H42CdF12N12P2

“…The ligands and metal centers both are the keys to the design and construction of metal-organic frameworks (MOFs) with fascinating topology and physicochemical properties [7,8].Flexible ligands are employed in the construction of metal-organic frameworks (MOFs) with variety of architectures and topologies because flexible ligands can adopt different conformations according to the geometric needs of the different metal ions [9,10]. The long flexible ligand 1,4-bis(imidazol-1-yl)butane (bimb)c an adopt various conformations with respect to the relative orientations of the CH 2 groups.…”

Crystal structure of poly[bis(1,4-di(1H-imidazol-1-yl)butane-κ2N:N′) zinc(II)]bis(hexafluoridophosphate), C20H28F12N8P2Zn

“…The ligands and metal centers both are the keys to the design and construction of MOFs with fascinating topology and physicochemical properties [10,11]. Flexible ligands are employed in the construction of MOFs with variety of architectures and topologies because flexible ligands can adopt different conformations according to the geometric needs of the different metal ions.…”