1, 10 - Brown's Lin Derivatives As Ligand Coordination Compounds Synthesis And Mechanism Of Magnetic Interaction Between The Molecules Is Studied

For more than three decades the study on the magnetism of molecule-basedcompounds has been one of advanced disciplines in area of materials scienceand it has mainly centred on the magneto-structural correlation or the factorsthat dominate magnetic coupling properties and its relevant structures forthose magnetic compounds, in which relevant spin-carriers were bridged bysole atom or multi-atoms, namely, the spin-carriers were connected bychemical bonds or the magnetic exchanges are through chemical bonds.Besides chemical bond the intermolecular force, such as stacking andhydrogen bond and intermolecular short contact, also plays key role inmagnetic interaction, but papers deal with the magnetic coupling throughintermolecular force are very limited. This dissertation aims to search for somefactors that dominate intermolecular magnetic coupling properties and tocorrelate molecular force with its magnetic coupling properties. Based on thisaspiration or aim six complexes were synthesized, which include the complex[Cu^â…¡Cu^Ⅰ（μ1,3–SCN）₂（μ1,1,3–SCN）（PE）]n（PE=2–ethoxy–1,10–phenanthroline）（1）,[Cu₂^Ⅱ（μ-I）₂Cu₂^Ⅰ（μ-I）₂（PP）₂I₂]（PP=2–（1H–pyrazol–1–yl）–1,10–phenanthroline）（2）,[Mn^â…¡Cl2（CH₃OH）（PP）]（3）,[Ni^Ⅱ（SCN）₂（PE）₂]（H₂O）₂（4）,[Co^Ⅱ（N₃）₂（PE）₂]（H₂O）₂（5） and [Cu^Ⅰ（PCC）₂]·ClO₄（PCC=2,9–dichlorine–1,10–phenanthroline）（6）. The infrared spectracharacterization was made on the six complexes and their crystal structuresdetermined by X-ray diffraction. The variable-temperature （2K–330K）magnetic susceptibility measurements for complex （1） and complex （2） wereperformed and the fitting on the obtained magnetic data was made and thesome experimental magnetic coupling properties were obtained. In order tounderstand the correlation between the intermolecular forces and the relevantmagnetic coupling properties, the theoretical calculations were performed. Thecalculations gave the information involving the spin density, the magnetic coupling sign and the magnetic coupling magnitude of the relevant magneticcoupling pathways.The obtained information in this dissertation may benefit to understand themagnetic coupling mechanism arisen from intermolecular force and it may alsobenefit to design and synthesize ideal molecule-based ferromagnet, especiallyfor those ferromagnet based on complexes and intermolecular force.