Kenneth N. Raymond Lecture: Ken Raymond's Broad Influence on the Development of Metallacrowns

Seminar | May 5 | 4-5 p.m. |  Pitzer Auditorium, 120 Latimer Hall

 Prof. Vincent Pecoraro, Department of Chemistry, University of Michigan

 College of Chemistry

In 1988, Ken Raymond and I had a conversation on coordination chemistry at a Gordon Conference. A consequence of this discussion was the preparation of the first report of the metallamacrocyclic class now known as metallacrowns. These molecules began as simple analogues of crown ethers that substituted the methylene carbons of these molecules with heteroatoms, typically N and a transition element. Over the years we demonstrated that these molecules could form molecular triangles, squares, pentagons and other more complex shapes and could be used for the recognition of cations, anions and other guest molecules. Because of the molecular topology, these compounds have also been of interest in studies of molecular magnetism, particularly with bound lanthanides and for the generation of highly emissive species containing Zn(II) or Ga(III) and Ln(III) The development of these novel molecules, with connections to Ken Raymond’s research, will be elaborated in this presentation.

 Light refreshments will be served at 3:50pm in The Coffee Lab, 510-643-0572