Octacyano-bridged Coordination Complexes: Synthesis, Crystal Structures And Magnetic Properties

The dissertation focuses on the synthesis and structures of octacyano-bridged coordination complexes, fifteen new coordination complexes based on [M(CN)8]3/4-(M= W, Mo) have been prepared and structurally characterized, of which three are 0D, 1D,2D respectively, nine are 3D coordination polymers and three are ionic. The magnetic properties of eleven synthesized compounds were investigated.1. The 2D to 3D strategy had been studied for the synthesis of three-dimensional octacyano-bridged coordination complexes. Through the connecting between [M(CN)8]3-(M= W, Mo) molecule building blocks and 2D structural {[Cu(DPP)2(SCN)2]}n, two isomorphic 3D octacyano-bridged coordination complexes was constructed, its magnetic properties had been characterized.2. The reduction of ligand's steric hindrance for the synthesis of 3D octacyano-bridged coordination complexes had been discussed. Through the reaction of Coâ…¡(S= 3/2) and paramagnetic [W(CN)8]3- in DMF together, the DMF solvent molecule coordinating with transition metal Co as a ligand, which gave rise to an octacyano-bridged coordination polymer showing diamond topology and ferromagnetic properties.3. Two coordination polymers based on the [M(CN)8]3-(M= W, Mo) molecule building blocks and copper were synthesized in the presence of pyridine ligand, one was 1D and another one was 3D structure. Their magnetic properties were studied.4. As the starting material of [M(CN)8]3- (M= W, Mo) could not dissolve in water solvent. Two 3D structural octacyano-bridged coordination polymers were constructed from the mixed solution of water and methanol. Their magnetic properties were studied.5. A 2D octacyano-bridged coordination polymer was synthesized by using the chelated ligand 1,10-phenanthroline, while a 0D structural octacyano-bridged coordination complex was obtained based on 2,5-di(3-pyridine)-L.6. The linear bridged ligand 2,5-di(4-pyridine)-L was introduced into the construction of two octacyano-bridged coordination polymer, which magnetic properties were also studied.