报告题目：“Super-Oxidized” Iron Nitrido & “Super-Reduced” Iron Nitrosyl Complexes in tris-Carbene Coordination Spheres – and How Iron Really Feels About it

报告人：Karsten Meyer 教授

邀请人：陈耀峰 教授

时间：2024年9月29日 14:30 - 16:00

地点：广州国际校区 C2a-207

欢迎广大师生踊跃参加。

自旋科技研究院

2024年9月24日

报告摘要：

In this seminar, we will present our work on the synthesis and reactivity of metal nitrido and nitrosyl complexes. First, we report our studies on high-valent Fe(IV, V, VI, and VII) nitrido complexes, synthesized via photolytic azide cleavage followed by oxidation with Ag^II and Xe^II-salts. Subsequently, we address the question of to what extent the complexes’ electronic and structural properties change when – formally –atomic oxygen is added to the nitrido ligand, thus, transforming a high-valent metal nitrido to a low-valent metal nitrosyl complex. The synthetic study was complemented with in-depth crystallographic, spectroscopic, and computational analyses, giving detailed insights into the electronic structure of the currently most complete series of iron nitride and nitrosyl complexes.

Formally, the transformation of the all trigonal-symmetric Fe^IV≡N to {Fe–NO}⁶, or even {Fe–NO}⁹, is a two- or even five-electron reduction, respectively, which is expected to be associated with striking structural changes. However, the formally high-valent iron nitrides and low-valent iron nitrosyls are structurally remarkably similar; thus, questioning the concept of oxidation states in {Fe–N(O)}ⁿ complexes! At least in this series of complexes, we conclude that nitrosyls are better described as oxo-imidos, more related to the classic imido and nitrido complexes.

报告人简介：

Karsten Meyer studied chemistry (October 1989 – 1994) at the Ruhr-University of Bochum (Germany) and received his Diploma in May 1995.  Starting in summer 1995, he performed his PhD thesis work under the supervision of Prof. Dr. Karl Wieghardt at the Max-Planck-Institute in Mülheim/Ruhr (Germany) and received his Ph.D. (Dr. rer. nat., summa cum laude) in January 1998. With a DFG postdoctoral fellowship, Karsten proceeded to gain research experience in the laboratory of Prof. Christopher Cummins at the Massachusetts Institute of Technology (1998 – 2000, MIT, Cambridge, MA, USA).  In January 2001, he was appointed to the faculty of the University of California, San Diego (UCSD) as an Assistant Professor and was named an Alfred P. Sloan Fellow in 2004. In 2006 he accepted an offer (C4/W3) to be the Chair of the Institute of Inorganic & General Chemistry at the Friedrich-Alexander-University of Erlangen-Nürnberg (FAU), Germany. 

He has published 300+ articles in peer-reviewed journals, leading to an h-index of 67 and 14,500+ citations (Scopus, 09/2024). The list of publications includes, among others, reports and articles in Science, Nature, Nature Chem., Chem, Journal of the American Chemical Society, Angewandte Chemie, and Chemical Science. He has given over 250 invited talks, including opening and plenary lectures, at conferences, research, and academic institutions worldwide. He received Alfred P. Sloan Award, USA(2004), Israel Chemical Society, Lifetime Honorary Member, IL(2009), Japanese Society for the Promotion of Science Award (JSPS), JP(2009), Elhuyar-Goldschmidt Award, Royal Society of Chemistry of Spain(2017), Ludwig-Mond Award, Royal Society of Chemistry (UK)(2017) and Chugaev Commemorative Medal, Kurnakov Institute, Moscow, Russian Academy of Sciences(2017), Japan Society of Coordination Chemistry International Award, JP(2022), Horizon Prize, Royal Society of Chemistry, UK(2022).