Gate-opening Induced by C8 Aromatics in a Double Diamondoid Coordination Network.

Coordination networks (CNs) that undergo guest-induced structural transformations are of topical interest thanks to their potential utility in separations and storage applications. Herein, we report a double diamondoid () topology CN, [Ni(bimpz)(bdc)(HO)] or (Hbdc = 1,4-benzenedicarboxylic acid, bimpz = 3,6-bis(imidazol-1-yl)pyridazine), that undergoes structural transformations induced by C8 isomers, i.e.

Dinuclear Copper Sulfate-Based Square Lattice Topology Network with High Alkyne Selectivity.

Porous coordination networks (PCNs) sustained by inorganic anions that serve as linker ligands can offer high selectivity toward specific gases or vapors in gas mixtures. Such inorganic anions are best exemplified by electron-rich fluorinated anions, e.g.

Metal cation substitution can tune CO, HO and CH switching pressure in transiently porous coordination networks.

Compared to rigid physisorbents, switching coordination networks that reversibly transform between closed (non-porous) and open (porous) phases offer promise for gas/vapour storage and separation owing to their improved working capacity and desirable thermal management properties. We recently introduced a coordination network, X-dmp-1-Co, which exhibits switching enabled by transient porosity. The resulting "open" phases are generated at threshold pressures even though they are conventionally non-porous.

Water vapour induced structural flexibility in a square lattice coordination network.

Herein, we introduce a new square lattice topology coordination network, sql-(1,3-bib)(ndc)-Ni, with three types of connection and detail its gas and vapour induced phase transformations. Exposure to humidity resulted in an S-shaped isotherm profile, suggesting potential utility of such materials as desiccants.

Control over Phase Transformations in a Family of Flexible Double Diamondoid Coordination Networks through Linker Ligand Substitution.

In this work, we present the first metal-organic framework (MOF) platform with a self-penetrated double diamondoid () topology that exhibits switching between closed (nonporous) and open (porous) phases induced by exposure to gases. A crystal engineering strategy, linker ligand substitution, was used to control gas sorption properties for CO and C3 gases. Specifically, bimbz (1,4-bis(imidazol-1-yl)benzene) in the coordination network ([Ni(bimbz)(bdc)(HO)], Hbdc = 1,4-benzenedicarboxylic acid) was replaced by bimpz (3,6-bis(imidazol-1-yl)pyridazine) in ([Ni(bimpz)(bdc)(HO)]).