Synthesis and Photoluminescence of Iridium(III) Diazine Complex Modified with a Carbazyl Group

设计合成了空穴传输性咔唑基团修饰的吡嗪配体,2,3-二(4-(9-咔唑基甲基)苯基)-5-甲基吡嗪(CzMPMP)及其铱配合物Ir(CzMPMP)2(acac)(acac:乙酰丙酮).用核磁共振(NMR)、质谱、元素分析等方法对其进行了表征,并用紫外-可见吸收光谱、液相和固相光致发光光谱对其光学性质进行了研究.通过与没有咔唑取代基的2,3-二苯基-5-甲基吡嗪铱配合物Ir(DPMP)2(acac)进行对照,说明咔唑基团对配合物的光学性质有显著影响.不含咔唑取代基的配合物Ir(DPMP)2(acac)的固态光致发光光谱中存在很强的激活双体(excimer)峰,而Ir(CzMPMP)2(acac)...We designed and synthesized a new pyrazine derivative containing the carbazyl moiety, 2,3-di(4-(9-carbazylmethyl)phenyl)-5-methylpyrazine(CzMPMP) and investigated its reaction with indium(III) ion to form the indium complex Ir(CzMPMP)(2)(acac) (acac: acetyl acetone) The complex was characterized by nuclear magnetic resonance (NMR) spectroscopy, mass spectrometry (MS) and elemental analysis (EA) and its photophysical properties were investigated by UV-Vis spectroscopy as well as solution and solid state photoluminescence (PL) techniques. By comparing Ir(CzMPMP)(2)(acac) with Ir(DPMP),(acac) (DPMP. 2,3-diphenyl-5-methylpyrazine), we find that the carbazyl group greatly influences the photophysical properties of the complexes Firstly, Ir(DPMP)(2)(acac) has a strong and broad excimer peak in its solid state PL spectrum, while Ir(CzMPMP)2(acac) has no such peak under the same conditions Furthermore, the PL intensity of Ir(CzMPMP)(2)(acac) in solution increased significantly compared with Ir(DPMP)(2) (acac) These results suggest that steric hindrance from the carbazyl groups may play an important role in preventing excimer formation and thus resulting in the increased PL intensityhttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000276958400051&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)3041184-11902