Design, Synthesis And Photoelectric Properties Of Functional Bisphosphine-coordinated Copper Complexe

Organic electroluminescent devices in the digital terminal display and solid plate luminous and other fields have a huge application prospects.Among them,the metal copper has a rich reserves,easy mining,easy processing and other advantages,becoming a star of the complex object material.In this paper,we use cuprous halide（Cu Cl,Cu Br,Cu I）as the coordination metal,and phenanthroline monophosphine（2-Phen P）,dibenzofuran bisphosphine（DBCDP）and dibenzothiophene bisphosphine（DBTDP）were coordinated.At the same time,we used3,6-biscarbazole-dibenzofurandiphosphine（DCz DBFDP）and3,6-bisbutyloxycarbonyl-dibenzofuran diphosphine（Dt BCz DBFDP）,both of them are coordinate with cuprous halide.1.2-Phen P ligands were designed and synthesized by the introduction of diphenylphosphine functional groups at the 2-position of phenanthroline,and coordinated with cuprous halide to form a series of red-emitting complexes.It is found that the complexes are N^P miscellaneous complexes with a compact coordination structure.The compact structure makes the twist of the copper excited state inhibited and the quantum yield is increased.In addition,the（35）E_STas low as 0.1 e V,to provide the necessary conditions for RISC.2.We used dibenzofuran as the main group,to synthesis of dibenzofuran diphosphine copper complexes.The complexes form cluster centers with mechanochromic and thermochromic properties.In addition,the complexes has a lower（35）E_ST,by measuring its variable temperature life,we determine its thermal activation delayed fluorescence properties.We further modified the dibenzofuran ligand to introduce the carbazole group at the 3 and 6 positions to increase the electron cloud density of dibenzofuran to enhance its radiation transition intensity.The experimental results show that（Dt BCz DBFDP）₂Cu_nX_nand（DCz DBFDP）₂Cu_nX_nluminous performance has been significantly enhanced,the singlet triplet energy level difference（35）E_STas low as 0.01 e V.3.we introduced diphenylphosphine as the coordination point in dibenzothiophene,and synthesized a series of cups with large pores（DBTDPCu X）₂,the complexes used as OFET.