美国休斯顿大学Thomas S. Teets教授做客第255期化苑讲坛

报告题目：Ancillary Ligand Strategies to Control Triplet Energies and Dynamics in Organometallic Phosphors

报 告 人 ：Thomas S. Teets教授

报告时间：2017年5月9日（周二）上午10:00

报告地点：化学楼二楼一号会议室

邀 请 人 ：张天乐教授

报告人简介：

Thomas S. Teets comes from the University of Houston and he has conducted many independent researches at the University of Houston as the assistant professor. He studied at the California Institute of Technology to get his Postdoctoral Scholar from 2012 to 2014. He obtained his PH.D degree at Massachusetts Institute of Technology in 2012 and the B.S degree at Case Western Reserve University in 2007. Thomas S. Teets has published thirty-nine papers in many important academic journals such as PANS, JACS, Chem. Sci., Chem. Commun. and Inorg. Chem up to now.

报告内容：

Bis-cyclometalated iridium complexes are well-known for their efficient triplet-state luminescence and excited-state redox chemistry. The Teets group has advanced the idea that the ancillary ligand(s) in these compounds can substantially alter the redox and photophysical properties, and this lecture describes advances in synthetic chemistry that lead to a more diverse collection of structures and can also lead to enhanced optical properties. Postsynthetic modification strategies, including nucleophilic functionalization of isocyanides and an unusual borane-mediated transmetalation reaction, provide access to complexes which cannot be prepared using established synthetic approaches. This talk also describes a series of yellow-to-red emitting complexes with nitrogen-containing β-ketoiminate and β-diketiminate ancillary ligands; these ancillary ligands greatly perturb the redox properties of the complexes and can also give rise to three to fourfold enhancement in the phosphorescence quantum yield.