Syntheses, Structures and Properties of Two Mn(Ⅱ) Clusters Based on 1,10-Phenanthroline-2,9-dicarbaldehyde Dioxime Ligand

摘要

Two novel clusters [MnⅢ3（μ3-O）（phendox）3]X·13H2O(X = Cl（1）, Br（2]） have been obtained from the solvothermal reactions of 1,10-phenanthroline-2,9-dicarbaldehyde dioxime（H2phendox） with MnCl2·4H2O or anhydrous MnBr2, and their structures were characterized by elemental analysis, FT-IR, XRD, TGA, MS and single-crystal X-ray diffraction. It crystallizes in trigonal, space group P31/c. X-ray analysis reveals that the neighbouring [Mn3（μ3-O）（phendox）3]+ cores are linked by C–H···Cl hydrogen bonds and form an infinite supramolecular chain along the c-axis. Neighbouring chains are packed with each other by off-set p-p interactions of the aromatic rings on phenox2-. A 3D supramolecular architecture in a honeycomb topology is formed with 1D hexagonal channel in the dimensions of 13? × 13? along the c-axis. The gas adsorption studies show that compound 1·13H2O is stable upon the removal of guest molecules and the desolvated compound absorbed considerable amount of CO2.