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Synthesis of Cyclometalated Iridium Complexes and Studies on Their Properties in Electrophosphorescent Devices

Author: WuZhongLian
Tutor: ZhuWeiGuo
School: Xiangtan University
Course: Organic Chemistry
Keywords: Electrophosphorescence Iridium Ring metal complexes Polymer light-emitting diodes
CLC: O641.4
Type: Master's thesis
Year: 2004
Downloads: 365
Quote: 2
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In this thesis the organic / polymer electroluminescent phosphorescent mechanism and development status. For electroluminescent phosphorescent materials and devices exist, we carried out the molecular design of the electric the phosphorescent material bicyclo metal iridium complexes, Synthesis and electroluminescent properties of the polymer. Design and synthesis of two types of a total of six kinds of bicyclo metal iridium complex, characterized by the molecular structure of these types of materials, as the object and a polymer and of bicyclo metal iridium complexes polyfluorene (PFO) or polyvinyl carbazole (PVK )] of the main body, produced the bilayer polymer electrolyte phosphorescent device, studied their electroluminescent properties. A series of substituted aryl acid chloride into two hydrazide and dehydration reaction by esterification, hydrazine solution, and synthesis of five 1, 3, 4 - oxadiazol azole ligand; pyridine and p-nitroaniline by the Gomberg-Bachmann reaction , Pd-C reduction and Ullmann reaction, synthesis of a triarylamine-containing functional group, 2 - phenyl - pyridine ligand. The obtained ligands respectively generating three hydrated iridium trichloride response. Chloro-bridged dimer, and then reacted with acetylacetone the bicyclo metal iridium complex. Its molecular structure was characterized by NMR, elemental analysis, mass spectrometry, and other means. The ultraviolet spectroscopy studies have shown that these bicyclic iridium complexes the metal - ligand charge electronic transitions (MLCT) absorption peak, these ring metal iridium complexes are two types of new electroluminescent phosphorescent material. Bicyclic metal iridium complexes as the object polymer materials PVK or PFO as the main material, the produced polymer Electrophosphorescent devices. Maximum external quantum efficiency (QEext) 2.77% of the a red electric phosphorescent devices and the largest QEext to 10.4% green electricity phosphorescent devices, which the green Electrophosphorescent devices luminous efficiency reached international level. The study showed that: (1) cycloalkyl the metal iridium complexes of the ligand in the introduction of a functional group having a carrier transporting property and a tert-butyl substituted structures can effectively improve the electroluminescent properties of the the bicyclo iridium complexes, when the ligand introduced having an amine functional group of the tert-butyl substituted tris-aryl, bicyclic iridium complex matter electroluminescent best performance; (2) in the red electroluminescent phosphorescent devices, PFO for the luminescent properties of the main body of the device is better than for the subject to PVK the luminescent properties of the device, the main material of choice of the shadow of the luminescent properties of the device lt; WP = 4 gt; the the Wuzhong Alliance: Iridium Complexes Synthesis and electrical properties of phosphorescent devices rang larger. In this thesis work laid a solid foundation for the next step to carry out a comprehensive the panchromatic electrical induced phosphorescent materials and devices, performance red, green and blue electroluminescent phosphorescent material and its devices.

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CLC: > Mathematical sciences and chemical > Chemistry > Physical Chemistry ( theoretical chemistry ),chemical physics > Structural Chemistry > Complex chemistry ( coordination chemistry )
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