Solvent induced structural variation in magnesium carboxylate frameworks

Four magnesium-based coordination polymers, formulated as Mg(ndc)(dmi) (1), Hdmu⋅Mg2(ndc)2(OH)(dmu)4 (2), Mg(ndc)(dma) (3), and Mg(ndc)(nmp)·0.5H2O (4), were prepared in an effort to investigate the effect of organic solvents on the framework structures. Compounds 1 and 2 have layered structures with a sql topology. Compounds 3 and 4 have three-dimensional structures with 4-connected pts and lvt-b topologies, respectively. The solvents exhibit multiple functions in the solvothermal reactions as a terminal ligand, bridging ligand, and charge-balancing agent.

Four magnesium-based coordination polymers have been synthesized in an effort to investigate the effect of organic solvents on the framework structures. These compounds display three types of 4-connected topologies, termed sql, pts and lvt-b, respectively.Figure optionsDownload as PowerPoint slideHighlights
► Four coordination polymers have been prepared under solvothermal conditions.
► Paddle-wheel Mg2(CO2)4 unit has been observed for the first time.
► These compounds display 4-connected frameworks with sql, pts and lvt-b topologies, respectively.