Synthesis And Characterization Of Copper(?)Complexes Containing Diphenylbiphenyl,Quinolyl And Fluorenyl

In recent years,OLED(organic light emitting diode)has been regarded as one of the most promising products due to the advantages such as spontaneous light,high visibility,quick response,light weight,thin thickness and simple construction,etc.The metals such as Pt2+,Ir3+,Os2+ and Ru2+ complexes used in OLED exhibit excellent luminescent properties.But these metals are expensive,easily cause pollution to the environment,the development of efficient electrophosphorescence copper(?)complexes attracts the attention of researchers.In this paper,cuprous halide was used as the starting materials,reacted with diphenyl-2-biphenylylphosphine,9,9-dimethyl-2-fluorenyldiphenylphosphine,triphenylphosph-ine and diphenyl-8-quinolyl phosphine to get the corresponding complexes,respectively.They were characterized by NMR,IR,Mass spectra,UV-vis,fluorescence spectroscopy and TGA,etc.Chapter ? IntroductionThis chapter briefly introduces the development history of OLED,luminescence principle and classification of the materials.Emphatically introduces the variety of Cu(?)complexes,the development of the ionic Cu(?)complexes and neutral Cu(?)complexes in recent years and summarizes the relationship between structure and properties.Finally puts forward the ideas and research content of this article.Chapter ? Synthesis and characterization of diphenyl-2-biphenylylphosphine copper(?)halide complexesUsing diphenyl-2-biphenylylphosphine as organic ligand,which was reacted with copper(?)halide at a ratio of 2:1 in methylene chloride at room temperature,three three-coordinative complexes were prepared,and the structure and photoelectric properties have been characterized.Systematically studied the luminescence properties,and the luminescence principle of the complexes,we found that the complexes belong to thermal activation delayed fluorescence(TADF)materials,in which the solid-state quantum efficiency of Cul complexes is highest with 1.04%.Chapter ? Synthesis and characterization of 9,9-dimethyl-2-fluorenyl diphenylphosphine copper(?)halide complexes.Using 9,9-dimethyl-2-fluorenyl diphenylphosphine as organic ligand,which was reacted with copper(?)halide at a ratio of 2:1 in methylene chloride at room temperature,three three-coordinative complexes were prepared,and the structure and luminescence properties have been characterized.At room temperature,all complexes show blue fluorescence emission in solid state upon excitation at 365 nm.But in low concentration of methylene chloride solution,fluorescence quenching occurs.Thermo-gravimetric study shows the three complexes have good thermal stability.Chapter IV Synthesis and characterization of diphenyl-8-quinolyl phosphine with triphenylphosphine mixed copper(?)halide complexesUsing diphenyl-8-quinolyl phosphine and triphenylphosphine as organic ligands,which were reacted with copper(?)halide at a ratio of 1:1:1 in methylene chloride at room temperature,two mixed complexes were prepared,and the structure and photoluminescence properties have been characterized.Under the condition of room temperature,the maximum emission wavelength of the two complexes in solid-state was at 605 nm and 618 nm,respectively.While in solid-state at 77 K,the emission peak red-shifted which appeared at 609 nm and 620 nm.Fluorescence quenching occured when the two complexes were in low concentrated methylene chloride solution.Solid-state quantum efficiency is highest for Cul complexes,up to 6.24%...