Polarized Micropores in a Novel 3D Metal–Organic Framework for Selective Adsorption Properties

Abstract

A novel 3D porous metal−organic framework with 1D polarized channels was synthesized, and its adsorption properties for gas separation and chemical sensing were studied. The framework shows a preferential adsorption of CO 2 over N 2 with a selectivity of 22:1. It also exhibits a very good sensitivity to water with respect to most of the organic solvents in view of chemical sensing applications.

Syntheses, structures and chemical sensing properties of three complexes with mixed ligands of carboxylate and bipyridine

“…NI 2 (ODA) 2 (4,4′-BIPY)•DMF (2). The structure of complex 2 is isostructural with Co 2 (oda) 2 (4,4′-bipy)•DMF we have reported recently, 16 Each oda ligand adopts a planar (mer) conformation. 15 There exist strong hydrogen bonds among uncoordinated carboxylate oxygen atoms of oda ligands, coordinated water and lattice water molecules.…”

Proton Conductivity and Sorption Study in Three Sulfonic Group Functionalized Mixed Ligand Coordination Polymers and the Impact of Structural Dynamicity on Their Property

“…The compound 1 exhibited the larger uptake of CO 2 compared to the other two compounds, which could be explained by its framework dynamicity. Their selective adsorption behavior can be explained on the basis of the kinetic diameters of the two gas molecules (i.e., CO 2 and N 2 ) as well as the polar adsorbate–adsorbent interaction in the framework. − The kinetic diameter of CO 2 (3.3 Å) is slightly smaller than that of N 2 (3.6 Å), which helps the dehydrated framework of compound 1 to accommodate a greater amount of CO 2 molecules into the void. Besides, the C atom of quadrupolar CO 2 molecule is Lewis acidic in nature; thus, it has a high tendency to interact with the Lewis basic polar pore surfaces of the dehydrated framework probably.…”