Topology Control of Porous Coordination Polymers by Building Block Symmetry

The coordination polymers [Fe2MO(piv)(6)(bipy)(1 5)](n) [M = Ni-II compound 1, and M = Co-II compound 2 piv = (CH3)(3)CCO2- and bipy = 4,4'-bipyridine] were prepared by linking trinu clear heterometallic pivalates, possessing D-3h symmetry, by linear molecules of bipy The complexes are isostructural and are built from 2D doubly interpenetrated honeycomb layers The structure of the starting polynuclear building blocks is retained which opens the way for the creation of materials with predetermined properties Zigzag channels in the crystal structure, of the compounds can adsorb N-2 and H-2 Un usual N2 adsorption/desorption hysteresis was observed Magnetic properties of the polymers are governed by ex change interactions in trinuclear blocks The gamma T-M vs T curve for 2 was fitted by taking into account the zero-field splitting of the Co-II ion by using software specially developed for this purpose