Synthesis And Thermodynamic Properties Of Co(?) And Ni(?) Dioxime Complexes And Several Novel Organic Ion Salts

In 2003,Ishikawa et al.reported the first case of mononuclear lanthanide metal-organic complexes with the properties of monomolecular magnets,which were later referred to as Single ion magnets.Compared with single-molecule magnets,single-ion magnets exclude the influence of intramolecular metal ions,which is more conducive to the study of the connection between magnetism and magnet structure.At the same time,by measuring the specific heat,the properties of the system are studied from the perspective of thermodynamics.In this paper,metal ions and dioxime are used to form a 6-coordination intermediate,and then dioxime and boric acid are added to form a caged complex,so that the central ions are completely separated from the outside world,and it is easier to explore the relationship between structure and magnetism.Organic ionic plastic crystal(OIPCs)is a special kind of solid electrolyte,which is widely used in lithium battery,fuel cell and dye-sensitized battery.Since OIPCs are negligible in volatility,they are more likely to be trialled in long-term use than subclasses of plastic crystals.In this paper,1-adamantanecarboxylic acid and quaternary ammonium base are used to synthesize new organic ion salts.The specific research content is as follows: 1.Eight caged mononuclear transition metal complexes [CoN6] were constructed based on two dioxime and four boric acids.The crystal structure of the complex was obtained by X-ray single crystal diffraction analysis.According to the thermogravimetric curve,the decomposition temperature of nickel complex is higher than that of cobalt complex under the same ligand condition.Temperature,X-ray powder diffraction,variable temperature polarization microscope combined with DSC analysis,by dimethylglyoxime,n-butyl boric acid,and Ni(?)synthetic complexes at-3.95 ? in solid-solid phase change,volume change method.By magnetic measurement,the complex is paramagnetic.By measuring the specific calorific value of the complex,the enthalpy and entropy values of the complex are calculated,and the contributions of electron heat capacity and lattice heat capacity are mainly in the low temperature region.2.As the amantadine derivatives such as amantadol and chlorogontane have molecular crystalline phases,organic ion salts are synthesized by reacting amantadine carboxylic acid with quaternary ammonium base.The phase transition process was studied by DSC and variable temperature XRD.With the increase of carbon chain in quaternary ammonium ions,the melting temperature became smaller and smaller,and the phase transition process became more complex.