A new kind of peripheral carbazole substituted ruthenium(II) complexes [Ru(bpy)2(tkdp-bpy)(AsF6)2] (4) (bpy = bipyridine, tkdp-bpy = 4,4′-(3,5-bis(6-(9H-carbazol-9-yl)hexyloxy)phenyl)methoxycarbonyl-2,2′-bipyridine) and [Ru(bpy)2 (dkte-bpy)(ClO4)2] (5) (dkte-bpy = bis(4-(9H-carbazol-9-yl)butyl)-2,2′-bipyridine-4,4′-dicarboxylate) were synthesized and their photophysical, electrochemical, as well as electroluminescent (EL) properties were studied. They display intense deep red phosphorescent emission centered at 660 nm and 658 nm, respectively, both in solution and in the solid state at room temperature. The peripheral carbazole in the complexes acts as an electrochemical coupling unit providing the ability to carry out electrochemical deposition (ED) and to form an ED film on an ITO electrode under a positive potential. Highly luminescent ED films are obtained under a carefully controlled ED process, and used as emitting layers in organic light-emitting diodes (OLEDs). The diodes gives out strong pure red emission and a luminous efficiency of 3.9 cd/A. These are the first electropolymerized phosphorescent OLEDs to be reported.
一种新型 perifluoroalkyl
咔唑取代的
钌(II)配合物 [Ru(bpy)2(tkdp-bpy)(AsF6)2](4)(bpy = bipyridine,tkdp-bpy = 4,4'-(3,5-双(6-(
9H-咔唑-9-基)己氧基)苯基)甲氧羰基-
2,2'-联吡啶)和 [Ru(bpy)2(dkte-bpy)(
ClO4)2](5)(dkte-bpy = 双(4-(
9H-咔唑-9-基)丁基)-
2,2'-联吡啶-4,4'-二
羧酸盐)被合成,并研究了它们的光物理性质、电
化学性质以及电致发光(EL)性质。它们在溶液和室温固态中分别显示出中心位于660 nm和658 nm的强烈的深红色
磷光发射。配合物中的 perifluoroalkyl
咔唑作为电
化学耦合单元,具有进行电
化学沉积(ED)并在ITO电极上形成ED膜在正电位下的能力。在仔细控制的ED过程中获得了高发光性ED薄膜,并用作有机发光二极管(OLEDs)的发光层。二极管发出强烈的纯红色发射,亮度效率为3.9 cd/A。这些是报道的首批电聚合
磷光OLED。