Two Mn3 cluster-based frameworks with porosity tuned by solvent coordination/non-coordination: Structural correlation and sorption properties

• Two porous Mn3 cluster-based metal-organic frameworks were obtained.
• The porosity is mainly dependent on the coordination ability of solvent molecules.
• The N2 sorption behaviors verify the difference in porosity.

Two new porous metal-organic frameworks based on the versatile terephthalate ligands and well-known Mn3 SBUs, namely [Mn1.5(tpa)1.5(MeOH)2]·(MeOH) (1) and [Mn1.5(tpa)(Htpa)]·(Solvent)x (2), have been prepared through altering solvent system. Single-crystal X-ray analysis reveals that their porosity is mainly dependent on the coordination ability of solvent molecules. Their structures are closely correlated with that of other two reported compounds ([Mn1.5(tpa)1.5(DMA)2]·(3) and [Mn1.5(atpa)(Hatpa)]·(4), DMA = N,N′-dimethylacetamide and H2atpa = 2-aminoterephthalic acid). Topological analysis is used to improve our understanding for the general feasibility to tune their porosity. The distinct porosity of two compounds has also been characterized by N2 adsorptions. Compound 2 has a type I adsorption isotherm with an appreciable adsorption of 74.72 cm3g− 1 at 0.35 P/P0, whereas 1 exhibits a maximum uptake of 19.84 cm3g− 1 at approximately 1 atm.

Herein, two new porous metal-organic frameworks based on the versatile terephthalate ligands and well-known Mn3 SBUs, namely [Mn1.5(tpa)1.5(MeOH)2]·(MeOH) (1) and [Mn1.5(tpa)(Htpa)]·B(Solvent)x (2), have been prepared through altering solvent system. Single-crystal X-ray analysis reveals that their porosity is mainly dependent on the coordination ability of solvent molecules. The distinct porosity of two compounds has also been characterized by N2 adsorptions. Compound 2 has a type I adsorption isotherm with an appreciable adsorption of 74.72 cm33Pg− 1 at 0.35 P/P0, whereas 1 exhibits a maximum uptake of 19.84 cm33Pg− 1 at approximately 1 atm.Figure optionsDownload as PowerPoint slide