Controlling Emission Energy, Self-Quenching, and Excimer Formation in Highly Luminescent N∧C∧N-Coordinated Platinum(II) Complexes
作者:Sarah J. Farley、David L. Rochester、Amber L. Thompson、Judith A. K. Howard、J. A. Gareth Williams
DOI:10.1021/ic051049e
日期:2005.12.1
CH(2)Cl(2)), in the order H < mesityl < 2-pyridyl < 4-tolyl < 4-biphenylyl < 2-thienyl < 4-(dimethylamino)phenyl (431 nm in CH(2)Cl(2)), which correlates with the decreasing order of oxidation potentials. A similar order is also observed in the emission maxima, ranging from 491 nm for [PtL(1)Cl] to 588 nm for the 4-(dimethylamino)phenyl-substituted complex. The emission spectra of all of the complexes, except
制备了一系列环金属化的铂(II)配合物[PtL(n)Cl],其中包含基于1,3-二吡啶基苯(HL(1))并结合有芳基的N-C-N配位齿状配体在配体中心5位的取代基。所有新的复合物都在298 K脱气溶液中强烈发光(在CH(2)Cl(2)中phi = 0.46-0.65),寿命在微秒范围内(7.9-20.5 micros)。与[PtL(1)Cl](CH(2)Cl(2)中的401 nm)相比,芳基取代基的引入导致最低能量的强烈电荷转移吸收带发生红移。 <均三元醇<2-吡啶基<4-甲苯基<4-联苯基<2-噻吩基<4-(二甲氨基)苯基(CH(2)Cl(2)中的431 nm),与氧化电位的降序相关。在发射最大值中也观察到类似的顺序,[PtL(1)Cl]的范围从491 nm到4-(二甲基氨基)苯基取代的络合物的范围为588 nm。除氨基取代的化合物外,所有配合物的发射光谱在CH(2)Cl(2)的稀溶液中