Ligand Torsion Engineering in Three Flexible Metal-Organic-Frameworks Exhibiting Distinct Breathing Behavior for Enhancing CH Capture.

Acetylene is an important industrial gas for the production of vinyl chloride and 1,4-butynediol, but its storage remains a major challenge because it is highly explosive. Flexible metal-organic frameworks (FMOFs) are always at the forefront of porous materials due to the transformation of the structure under the external stimuli. In this work, divalent metal ions and multifunctional aromatic N,O-donor ligands were chosen, and three FMOFs [M(DTTA)]·guest [M = Mn (), Cd (), and Cu ()] (HDTTA = 2,5-bis(1-1,2,4-trazol-1-yl) terephthalic acid) have been successfully constructed.

Two Stable Sodalite-Cage-Based MOFs for Highly Gas Selective Capture and Conversion in Cycloaddition Reaction.

Stable metal-organic frameworks, containing periodically arranged nanosized cages or pores and active Lewis acid-base sites, are considered ideal candidates for efficient heterogeneous catalysis. Herein, based on the light of reticular chemistry design principles, the ingenious assembly of two pyridine N-rich multifunctional triangular linkers, HTBA [3,5-di (1h-tetrazol-5-yl) benzoic acid] and HTZI [5-(1H-tetrazol-5-yl)isophthalic acid], with Mn formed PCP-33(Mn) and PCP-34(Mn), respectively. PCP-33(Mn) and PCP-34(Mn) are typical topology zeolitic metal-organic frameworks (ZMOFs) with hierarchical tetragonal micropores and metal organic polyhedral sodalite-like cages.