Synthesis and phosphorescence of a new iridium(III) pyrazine complex

利用5-甲基-2,3-二苯基吡嗪(MDPP)和水合三氯化铱(IrCl3·H2O),合成了一种新型吡嗪铱配合物Ir(MDPP)2(acac).通过1HNMR、元素分析和质谱方法对配合物结构进行了表征,并研究了配合物的吸收光谱和光致发光光谱.结果表明,配合物Ir(MDPP)2(acac)在393和528nm处存在单重态1MLCT(金属到配体的电荷跃迁)和三重态3MLCT的吸收;在588nm处有较强的金属配合物三重态的磷光发射,是一种绿色磷光材料.The aim of this study is to explore new phosphorescent materials as highly efficient electroluminescent (EL) emitters in organic light emitting diodes (OLEDs). Iridium (III) complexes were selected as the target compounds for their strong spin orbit coupling that may result in high efficient electro-phosphorescence in OLED at room temperature. Thus, a new iridium pyrazine complex, Ir(MDPP) (2)(acac) (MDPP = 5-methyl-2, 3-diphenylpyrazine; acac = acetylacetone) was synthesized by reaction of 5-methyl-2, 3-diphenylpyrazine with iridium trichloride hydrate. The procedure of synthesis is simple and easy control. The complex was characterized by elemental analysis, H-1 NMR, and mass spectroscopy. The complex shows strong (MLCT)-M-1 (singlet metal to ligand charge-transfer) and (MLCT)-M-3 (triplet metal to ligand charge-transfer) absorption at 386 and 507 nm, respectively. The complex also gives rise to a strong photoluminescence at 549 nm at room temperature. These results suggest the complex to be a promising phosphorescent material.http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000186238300001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701SCI(E)中文核心期刊要目总览(PKU)中国科技核心期刊(ISTIC)中国科学引文数据库(CSCD)810889-8911