Ahn So Youn, Lee Hyun Shin, Ha Yunkyoung
Department of Information Display Engineering, Hongik University, Seoul 121-791, Korea.
J Nanosci Nanotechnol. 2011 May;11(5):4414-8. doi: 10.1166/jnn.2011.3656.
The synthesis and luminescence of iridium(III) complexes containing new phenylpyridine (C(see test for symbol)N) ligands, 4-Me-4'-F-ppy, 4-Me-4'-CF3-ppy and 4-OMe-4'-CF3-ppy, were studied. These ligands were designed for development of the blue light-emitting iridium complexes by introducing the electron-withdrawing group (F, CF3) and the electron-donating group (Me, OMe) at the para positions of the phenyl and pyridine ligand rings, respectively. As an ancillary ligand, trzl-CMe3 was employed where trzl-CMe3 represents 2-(5-tert-butyl-2H-1,2,4-triazol-3-yl)pyridine. The resulting iridium complexes, Ir(4-Me-4'-F-ppy)2(trzl-CMe3), Ir(4-OMe-4'-CF3-ppy)2 (trzl-CMe3) and Ir(4-Me-4'-CF3-ppy)2(trzl-CMe3) exhibited the blue emission at 472, 484 and 494 nm in CH2Cl2 solution, respectively. Ir(4-Me-4'-F-ppy)2(trzl-CMe3) showed the most hypsochromic shift in photoluminescence (PL) among the complexes prepared herein. In the electroluminescence (EL) spectra, Ir(4-Me-4'-F-ppy)2(trzl-CMe3) and Ir(4-Me-4'-CF3-ppy)2(trzI-CMe3) exhibited the luminescence peak at 437 nm and 496 nm, respectively. In the aspect of blue emission color purity, Ir(4-Me-4'-F-ppy)2(trzl-CMe3) had the CIE coordinates of (0.176, 0.143), very close to the saturated standard blue emission.
研究了含有新型苯基吡啶（C（符号见测试）N）配体4-Me-4'-F-ppy、4-Me-4'-CF3-ppy和4-OMe-4'-CF3-ppy的铱（III）配合物的合成及发光性能。这些配体通过分别在苯基和吡啶配体环的对位引入吸电子基团（F、CF3）和供电子基团（Me、OMe）来设计用于开发蓝光发射铱配合物。作为辅助配体，使用了trzl-CMe3，其中trzl-CMe3代表2-(5-叔丁基-2H-1,2,4-三唑-3-基)吡啶。所得铱配合物Ir(4-Me-4'-F-ppy)2(trzl-CMe3)、Ir(4-OMe-4'-CF3-ppy)2(trzl-CMe3)和Ir(4-Me-4'-CF3-ppy)2(trzl-CMe3)在CH2Cl2溶液中分别于472、484和494 nm处呈现蓝色发射。Ir(4-Me-4'-F-ppy)2(trzl-CMe3)在本文制备的配合物中光致发光（PL）显示出最大的紫移。在电致发光（EL）光谱中，Ir(4-Me-4'-F-ppy)2(trzl-CMe3)和Ir(4-Me-4'-CF3-ppy)2(trzI-CMe3)分别在437 nm和496 nm处呈现发光峰。在蓝光发射色纯度方面，Ir(4-Me-4'-F-ppy)2(trzl-CMe3) 的CIE坐标为(0.176, 0.143)，非常接近饱和标准蓝光发射。
