Tang Man-Chung, Lee Chin-Ho, Ng Maggie, Wong Yi-Chun, Chan Mei-Yee, Yam Vivian Wing-Wah
Institute of Molecular Functional Materials, Areas of Excellence Scheme, University Grants Committee (Hong Kong) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China.
Angew Chem Int Ed Engl. 2018 May 4;57(19):5463-5466. doi: 10.1002/anie.201711846. Epub 2018 Mar 30.
A new class of fused heterocyclic tridentate ligand-containing alkynylgold(III) complexes with tunable emission color has been successfully designed and synthesized. Structural modification of the σ-donating fused heterocyclic alkynyl ligands, including substituted fluorene, carbazole, and triphenylamine, enables a large spectral shift of about 110 nm (ca. 3310 cm ) that covers the green to red region to be realized with the same tridentate ligand-containing alkynylgold(III) complexes in solid-state thin films. Interestingly, the energy of the excimeric emission can be controlled by the rational design of the fused heterocyclic alkynyl ligands. Superior solution-processable organic light-emitting devices (OLEDs) with high external quantum efficiencies (EQEs) of 12.2, 13.5, 9.3, and 5.2 % were obtained with green, yellow, orange, and red emission. These high EQE values are comparable to those of the vacuum-deposited OLEDs based on structurally related alkynylgold(III) complexes.
一类新型含稠合杂环三齿配体的炔基金（III）配合物已成功设计并合成，其发射颜色可调。通过对给σ电子的稠合杂环炔基配体进行结构修饰，包括取代芴、咔唑和三苯胺，在固态薄膜中使用相同的含三齿配体的炔基金（III）配合物可实现约110 nm（约3310 cm）的大光谱位移，覆盖从绿色到红色的区域。有趣的是，通过合理设计稠合杂环炔基配体可以控制准分子发射的能量。采用绿色、黄色、橙色和红色发射获得了具有12.2%、13.5%、9.3%和5.2%的高外量子效率（EQE）的优异溶液可加工有机发光器件（OLED）。这些高EQE值与基于结构相关的炔基金（III）配合物的真空沉积OLED相当。
