Cationic Bis-cyclometallated Iridium(III) Phenanthroline Complexes with Pendant Fluorenyl Substituents: Synthesis, Redox, Photophysical Properties and Light-Emitting Cells
作者:Xianshun Zeng、Mustafa Tavasli、Igor F. Perepichka、Andrei S. Batsanov、Martin R. Bryce、Chien-Jung Chiang、Carsten Rothe、Andrew P. Monkman
DOI:10.1002/chem.200700308
日期:2008.1.18
cis positions. The complexes 6 and 9 displayed reversible oxidation waves in cyclic voltammetric studies (E(ox)(1/2)=+1.18 and +1.20 V, respectively, versus Ag/Ag(+) in CH(2)Cl(2)) assigned to the metal-centred Ir(III)/Ir(IV) couple. The complexes exhibit strong absorption in the UV region in solution spectra, due to spin-allowed ligand-centred (LC) (1)pi-pi* transitions; moderately intense bands occur
我们报告了一系列通式为[Ir(ppy)(2)(phen)] PF(6)(ppy = 2-苯基吡啶,phen =取代的菲咯啉)。这些配合物的特征在于,phen配体被一个或两个9,9-二己基芴基取代基取代以提供扩展的pi共轭,例如3- [2-(9,9-二己基芴基)]菲咯啉和3,8 -双[2-(9,9-二己基芴基)]菲咯啉配体分别提供配合物6和9。对包含3,8-双(4-碘苯基)菲咯啉配体的相关配合物18的单晶X射线衍射研究显示Ir原子的八面体配位,其中ppy配体的金属化C原子占据了顺式职位。络合物6和9在循环伏安研究中显示可逆的氧化波(分别为E(ox)(1/2)= + 1.18和+1.20 V,而CH(2)Cl(2)中的Ag / Ag(+))分配给以金属为中心的Ir(III)/ Ir(IV)对。由于自旋允许的以配体为中心的(LC)(1)pi-pi *跃迁,络合物在溶液光谱的UV区显示出强吸收性。中等强度的谱带出现在大约360-390