Construction And Magnetic Research Of Tricyano-bridged Zero-dimensional Cluster Molecule-based Magnets

The tricyanide-bridged zero-dimensional cluster molecule-based magnets have attracted much attention because of their potential applications in high-density information storage,molecular sensors and spin quantum and other fields.Thus the design and construction of zero-dimensional molecule-based magnets with special structure and magnetism is one of the hot topics in the fields of chemistry,physics and material science.In recent years,the zero-dimensional cluster molecule-based magnets have great development,but there are still some problems:?1?How to controllably construct zero-dimensional compounds;?2?How to construct charge-transfer compounds.In this paper,selecting the adjacent phenanthroline bidentate ligands and other bidentate ligand adjusts the coordination environment of the spin ions;selecting the tricyanide structures with different resistance regulates the redox potential of the Fe^III ion;introducing different transition metal ions adjusts magnetism of zero-dimensional cluster molecule-based magnets.The main research results are as follows:?1?Four tricyanide-bridged metal cluster molecule-based magnets were synthesized by the reaction of different steric bidentate ligands;different steric tricyanometalate buliding units[Bu₄N][Fe^III?L??CN?₃](L=PzTp,Tp*and Tp^Me)with transition metal Co^II,Fe^II,Cu^III and Zn^II ions.The magnetic analysis showed that the compounds 1,3,4 and 5 exhibited anti-ferromagnetic interactions,the compound 2 displayed ferromagnetic interactions and compound 6 showed ferromagnetic interactions.?2?Tricyanide-bridged electron transfer compound 7·7CH₃OH·6H₂O was synthesized by the reaction of bidentate 2-?3-fluorophenyl?-1H-imidazo[4,7-f][1,10]phenanthroline;tricyanometalate builing units[Bu₄N][Fe^III?Tp??CN?₃]with Co^II ion.The compound7·7CH₃OH·6H₂O was dried in vaccum drying oven to obtain the compound 7.The magnetic analysis showed that the compound 7·7CH₃OH·6H₂O exhibited thermal induced charge transfer behavior and three-step spin transition phenomenon during the cooling process which was related with intermolecular?…?interaction.Besides,the compound 7 showed thermal and light-induced charge transfer behavior.