Synthesis, structure and electroluminescent properties of cyclometalated iridium complexes possessing sterically hindered ligands
作者:Marappan Velusamy、K. R. Justin Thomas、Chih-Hsin Chen、Jiann T. Lin、Yuh S. Wen、Wan-Ting Hsieh、Chin-Hung Lai、Pi-Tai Chou
DOI:10.1039/b618311e
日期:——
incorporating pyridine or benzoimidazole N donors and a sterically hindered cyclometalating aromatic core featuring a polyphenylenephenyl, fluoranthene, or triphenylene segment are prepared and successfully converted into heteroleptic iridium(III) cyclometalated complexes with acetylacetone auxiliary ligands. The X-ray structure of the complex, derived from a ligand containing a fluoranthene fragment
制备了新的CN供体配体,该配体结合了吡啶或苯并咪唑N供体以及具有聚苯苯基,荧蒽或三亚苯基链段的位阻环金属化芳族核,并成功转化为具有乙酰丙酮辅助配体的杂铱(III)环金属化配合物。从含有荧蒽片段的配体衍生的配合物的X射线结构已被解析以揭示相应的结构。结果清楚地表明,σ配位体片段的性质在决定发射轮廓和峰位置方面起着关键作用,因此发射色调已成功地从绿色调到红色。通过计算(DFT)方法也提供了此观点的补充支持。