Ir(dfppy)2(dtbbpy)+PF6-铱配合物的合成、晶体结构及光物理性能测试

Synthesis,crystal structure and light-physical properties of Ir(dfppy)2( dtbbpy)+PF6- complex

  • 摘要: 本文以氯桥二聚体(dfppy)2Ir(μ-Cl2) Ir(dfppy)2、配体4,4'-二叔丁基-2,2'-联吡啶(dtbbpy)和六氟磷酸钾(KPF6)合成了一种阳离子型铱配合物Ir(dfppy)2(dtbbpy)+PF6-,并通过元素分析、核磁共振谱及质谱分析确定了它的分子结构,并考察了其光物理性能及热稳定分析。结果发现,配合物Ir(dfppy)2(dtbbpy)+PF6-在500 nm处具有很强的绿光发射光谱,热稳定很好。并首次用溶剂缓慢挥发法培养出Ir(dfppy)2(dtbbpy)+PF6-的晶体,X射线单晶衍射仪对其结构进行了表征,获得了晶体结构参数,结果表明配合物为单斜晶系、P121/c1空间群。

     

    Abstract: A chemical technique was developed for batch synthesis of Ir (dfppy)2 (dtbbpy) +PF6-,an organometallic light-emitting molecule for OLED. The process involves cycometalation of chloride-bridged dimer (dfppy)2 Ir (μ-Cl2) Ir (dfppy)2 with 4,4’-ditert-butyl-2,2’-bipyridine by hexafluorophosphate acid to produce the desired compound in a batch scale. The chemical structure of Ir (dfppy)2 (dtbbpy) +PF6-was verified by elemental analysis,NMR(1 H and 13 C),MS and FT-IR along with single crystal X-ray diffraction data. The synthesized Ir (dfppy)2 (dtbbpy) +PF6- is an electrically neutral octahedral complex. The green-emission at room temperature peaked at 500 nm. Single crystals of complex was prepared,via a solvent evaporation technique,and was subjected to X-ray diffraction analysis.The results show complex is in the monoclinic system with a space group of P121/c1.

     

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