Phosphorescent Pt(<scp>ii</scp>) acetylacetonate complexes bearing 9-(pyrimidin-2-yl)-9<i>H</i>-carbazole ligand: syntheses, photophysical properties and OLED applications
作者:Haibo Yao、Lequn Yuan、Ling Pei、Yunjun Shen、Yuzhen Zhang、Liang Zhou、Hedong Bian
DOI:10.1039/d3tc03117a
日期:——
with Φ = 25%, τ = 7.48 μs, 4a emitting at 586 nm with Φ = 38%, τ = 2.32 μs, and 1b emitting at 573 nm with Φ = 5%, τ = 1.44 μs in 2 wt% polymethyl methacrylate (PMMA) films. The OLED devices were fabricated through a vapor deposition process utilizing complexes 2a and 4a as emitting materials. The 2a-based devices exhibited an emission peak at 525 nm with a maximum external quantum efficiency (EQEmax)
四种单核铂 ( II ) 配合物,Pt(TBPCH)(acac) 1a、 Pt(TBPCH)(dpmn) 2a、Pt(TBPCH)(dbmn) 3a和 Pt(TBPCH)(dnmn) 4a,以及一种双核 Pt( II ) 络合物,Pt 2 (TBPC)(acac) 2 1b,其中 TBPCH 2 = 3,6-二叔丁基-9-(嘧啶-2-基)-9 H-咔唑,acac = 乙酰丙酮化物,dpmn =二新戊酰甲烷酸酯、dbmn = 二苯甲酰甲烷酸酯和 dnmn = 二(2-萘甲酰基)甲烷酸酯是通过利用 TBPCH 2 (C^N) 作为主要配体和乙酰丙酮衍生物 (O^O) 作为辅助配体制备的。所有五种配合物均使用NMR、HR-MS、元素分析、CV、TGA 和单晶X 射线衍射进行表征,但2a 除外,其未获得单晶。此外,还进行了 TD-DFT 计算来研究配合物的三线态发射性质。所有五个配合物均表现出磷光,配合物1a在