广州化学2025，Vol.50Issue(4)：20-24,5.DOI:10.16560/j.cnki.gzhx.20250416
三蝶烯哒嗪位阻效应改善二齿铂配合物电致发光性能
Enhancing Electroluminescence in Bidentate Pt(Ⅱ)Complexes via Aza-triptycene Steric Hindrance
摘要
Abstract
Three symmetric bidentate platinum(Ⅱ)complexes Pt(dpp)2,Pt(Idpp)2,and Pt(Idfp)2 were synthesized and structurally characterized.Among them,Pt(Idpp)2 and Pt(Idfp)2 are platinum(Ⅱ)complexes based on aza-triptycene.The quantum yields of these complexes in thin-film states were measured as 45.13％,57.34％and 64.51％,respectively,showing a progressive increase.Organic light-emitting devices(OLEDs)fabricated using these emitters exhibited electroluminescent(EL)emission peaks at 550,590 and 570 nm,respectively,which were consistent under different voltages,indicating excellent spectral stability.Notably,Pt(Idfp)2 achieved a maximum luminance of 17,426 cd/m2,while the current efficiencies of Pt(Idpp)2 and Pt(Idfp)2,which have aza-triptycene ligands,are 5.06 and 8.07 cd/A respectively,significantly higher than 1.24 cd/A of Pt(dpp)2.This study demonstrates that constructing a rigid three-dimensional triptycene unit within the platinum(Ⅱ)complex systems effectively modulates intermolecular interactions through pronounced steric hindrance effects.On one hand,it can suppress π-π stacking interactions between planar molecular architectures,and on the other hand,it can suppress the dissipation of excited state energy through non radiative channels,thereby achieving a significant improvement in the radiative transition efficiency of the platinum(Ⅱ)complex.Furthermore,when combined with the synergistic modification of electron withdrawing groups,the composite system can further reduce the non-radiative transition energy barrier and achieve significant optimization of quantum efficiency.These results indicate that these materials have potential application value in the field of organic light-emitting diodes(OLEDs).关键词
三蝶烯/哒嗪/铂配合物/有机发光二极管Key words
triptycene/pyridazine/platinum complex/organic light-emitting diode分类
化学化工引用本文复制引用
马雪燕,陈晨,梅群波..三蝶烯哒嗪位阻效应改善二齿铂配合物电致发光性能[J].广州化学,2025,50(4):20-24,5.基金项目
国家自然科学基金(61675088,61675089) （61675088,61675089）
