Synthesis And Characterization Of Copper Complexes Of Triphenylamine-based Dicarboxylic Acids Containing Trifluoromethyl Substitutents

Complexes formed by self-assembly between transition metal ions and liga nds through coordination bonds,stacking,etc.often show peculiar physical and chemical properties.As a kind of important transition metal complexes,coppe r complexes have broad application prospects in many fields such as optics,el ectricity,magnetism,catalysis,ion exchange,biological simulation,and molecul ar sieve adsorption,and so on.Triphenylamine?TPA?and TPA-based derivativ es have high hole mobility and excellent electrochemical performance,and are widely used as optoelectronic materials,hole transport materials,photoconductor s,storage equipment,porous materials,etc.Fluorine has a strong electronegativ ity,a small size,can form strong chemical bonds and has excellent optical and electrical properties,etc.,making it an extremely valuable substituent in the m olecular design of chemical substances.Therefore,it is a meaningful work to d evelop some copper complexes based on dicarboxylic acid ligands containing tr ifluoromethyl substituted triphenylamine structures.Based on the above factors,in this thesis,three binary organic carboxylic acidscontaining trifluoromethyl substituted triphenylamine structure were synthesi zed by us,they were selected to react with Cu(NO₃2)·3H₂O to synthesize sixn ew-type copper complexes.Elemental analysis,infrared spectroscopy,and X-ray single crystal diffraction were used to characterize their structures,and the sy nthesis conditions of these complexes were explored in depth,furthermore,the optical and thermal stability of the complexes were investigated.Finally,a mor e mature synthesis method is summarized,which has better optical propertiesan d thermal stability.The main content of the paper includes:Part one:A ligand of N,N-bis?4-carboxyphenyl?-4-trifluoromethylaniline wa s synthesized and it was selected as the ligand to react with Cu?NO₃?₂·3H₂O with solvothermal method,through the reaction temperature and reaction time s olvent and pH conditions adjustment,it was found that without adding any alk aline solution,at a moderate reaction temperature,using ethyl acetate,n-propan ol,and ethanol as solvents,three network-like two-dimensional new copper ba sed MOFs were obtained,its structure and properties were analyzed.Part two:Using methanol as the solvent and with solvothermal method,a new type of the single crystal copper based MOFs with a two-dimensional network structure was synthesized.The effect of different trifluoromethyl substitution positions on the structure and properties of the copper MOFs are investigated.Part three:By sinthesing the ligand of N,N-bis?4-carboxyphenyl?-3,5-bistrif luoromethylaniline,and with a similar method as above,another new network was obtained using ethyl acetate as a solvent.The two-dimensional structure of the copper based MOFs was further analyzed for the effect of the number an d position of trifluoromethyl substituents on the benzene ring on the structurea nd performance of the copper based MOFs.