题目：

Highly phosphorescent platinum(II) complexes based on rigid unsymmetric tetradentate ligand

作者：

Xiao-Qing Zhang^{a, 1}, Yue-Min Xie^{a, 1}_, Yonghao Zheng^b, Feng Liang^a, Bin Wang^a, Jian Fan^{a, *}, Liang-Sheng Liao^a

单位：

^aJiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University

^bDepartment of Chemistry, Rice University, Houston, TX 77005, United States

摘要：

A new class of highly phosphorescent Pt(II) complexes (Pt1-Pt3) based on rigid unsymmetric tetradentate ligands (L1-L3) were designed and synthesized. L1-L3 ligands are an analogue to N,N-di(2-phenylpyrid-6-yl)aniline (L) except that one coordination phenyl group in L is replaced by other motifs with different electron donating/accepting capabilities. The effect associated with the modulation of asingle coordination group within each ligand on the photophysical and electroluminescent properties of Pt1-Pt3 was investigated systematically. Among Pt1-Pt3, Pt1 has the highest HOMO due to the presence of a strong electron-donating group (3-methylindole), and exhibits the narrowest bandgap; Pt2 has the lowest HOMO due to the lack of strong donor group within the structure, and shows the widest bandgap. Organic light-emitting diodes (OLEDs) based on these three complexes showed yellowish green to greenish yellow electroluminescence with high efficiency. Notably, the device based on Pt1 at the doping level of 10 wt% achieved a maximum efficiency of 53.0 cd A^-1, 35.9 lm W^-1 and 16.3% with CIE coordinates of (0.44, 0.53).

影响因子：

3.827

分区情况：

2区

链接：

http://www.sciencedirect.com/science/article/pii/S156611991630060X