Tuning State Energies for Narrow Blue Emission in Tetradentate Pyridyl-Carbazole Platinum Complexes
作者:Tyler Fleetham、Jessica H. Golden、Muazzam Idris、Han-Ming Hau、Daniel Sylvinson Muthiah Ravinson、Peter I. Djurovich、Mark E. Thompson
DOI:10.1021/acs.inorgchem.9b01888
日期:2019.9.16
withdrawing (trifluoromethyl) substituent groups at the positions para to the nitrogen of the pyridines in PtNON. These substitutions resulted in destabilization or stabilization of the charge transfer state (CT) relative to the ligand centered (LC) state, resulting in complexes with narrow or broad emission spectra in various media. PtNON-OMe emits predominantly from the LC state, giving a narrow emission
在有机发光二极管领域中,非常需要窄而深的蓝色发射器,以用于高质量全彩显示和固态照明应用。据报道,PtNON是一种深蓝色发射磷光体,但受其宽发射光谱的限制,使其不适合用于高质量全彩显示应用。在这项工作中,我们报告了一种通过在PtNON中与吡啶的氮原子对位的位置引入供电子(甲基或甲氧基)或撤出(三氟甲基)取代基团来微调PtNON衍生物的颜色和发射线形状的策略。 。这些取代导致电荷转移状态(CT)相对于以配体为中心(LC)的状态不稳定或稳定,从而导致在各种介质中具有窄或宽发射光谱的配合物。PtNON-OMe主要从LC状态发射,在任何介质中给出的窄发射光谱fwhm = 48 nm。PtNON-Me在非极性介质(fwhm = 54 nm)中主要从LC状态发射,并且在极性介质(fwhm = 83 nm)中主要从CT状态发射。最后,PtNON-CF3在任何介质中仅从CT状态发射,因此具有较宽的发射光谱(fwhm