Water vapour sorption properties of a family of square lattice topology porous coordination networks.

Porous coordination networks (PCNs) such as metal-organic frameworks are of topical interest thanks to their potential utility as sorbents for gas and vapour separations and/or storage. Interpenetrated PCNs, some of which offer promise for gas separations, remain relatively understudied in the context of water vapour sorption. Herein, we report an in-depth study of the water vapour sorption properties of a family of square lattice topology () PCNs of general formula (, M = Mn, Co, Ni, Zn, bipy = 4,4-bipyridine, squa = squarate).

A pcu topology metal-organic framework, Ni(1,4-bib)(inca), that exhibits high CO/N selectivity and low water vapour affinity.

Herein we report the synthesis of a new metal-organic framework, Ni(1,4-bib)(inca) or pcu-1-Ni, where 1,4-bib = 1,4-bis(imidazole-1-yl)benzene, inca = indazole-5-carboxylic acid, through the crystal engineering strategy of using an N-donor linker to pillar a square lattice, sql, topology net. pcu-1-Ni adopts pcu topology and features two types of hydrophobic pore, small pore A and large pore B. The biporous nature of pcu-1-Ni is reflected in its stepped CO and HO adsorption isotherms, highlighting the influence of pore size and chemistry on gas and water vapour sorption properties.

A new type of CH binding site in a -bridging hexafluorosilicate ultramicroporous material that offers trace CH capture.

Hybrid ultramicroporous materials (HUMs) comprising hexafluorosilicate (SiF , SIFSIX) and their variants are promising physisorbents for trace acetylene (CH) capture and separation, where the inorganic anions serve as -bridging pillars. Herein, for the first time, we report a strategy of fluorine binding engineering in these HUMs switching the coordination mode of SIFSIX from traditional to rarely explored . The first example of a rigid HUM involving -bridging SIFSIX, SIFSIX-bidmb-Cu (bidmb = 1,4-bis(1-imidazolyl)-2,5-dimethylbenzene), is reported.

Supramolecular isomerism and structural flexibility in coordination networks sustained by cadmium rod building blocks.

Bifunctional N-donor carboxylate linkers generally afford and topology coordination networks of general formula ML that are based upon the MN(CO) molecular building block (MBB). Herein, we report on a new N-donor carboxylate linker, β-(3,4-pyridinedicarboximido)propionate (PyImPr), which afforded Cd(PyImPr) reaction of PyImPrH with Cd(acetate)·2HO. We observed that, depending upon whether Cd(PyImPr) was prepared by layering or solvothermal methods, 2D or 3D supramolecular isomers, respectively, of Cd(PyImPr) were isolated.