Prof. Gregory J. Grant – University of Tennessee at Chattanooga
Event Date:
November 4, 2013 – 4:00 PM to November 5, 2013 – 4:59 PM
Location:
Burson 115
Event Date:
November 4, 2013 – 4:00 PM to November 5, 2013 – 4:59 PM
Location:
Burson 115
Seminar Series
Fall 2013
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Prof. Gregory J. Grant
Department of Chemistry
University of Tennessee at Chattanooga
“Lords of the Thioether Rings: Metal Complexes with Thiacrown Ligands”
ABSTRACT:
Our research group has been interested in the coordination chemistry of thiacrown ligands such as 1,4,7-trithiacyclononane (9S3) and related macrocycles involving other donor atom types. This talk will focus on complexes containing d8 metal ions –Pt(II), Pd(II), and Au(III). The electronic preferences for a square planar geometry for these ions and the steric preference for 9S3 to bind facially as a tridentate ligand result in an “orbital mismatch” and unusual complex properties. Our most recent work focuses on Au(III) thiacrown complexes with cyclometallating ligands such as 2-phenylpyridine. In addition, the talk will discuss our work involving coordination polymers using thiacrown complexes with Pt(II) and Pd(II) as vertices in molecular squares and triangles. These supramolecular complexes are formed by metal-directed self-assembly using bridging diimines like 4,4’-bipyridine and typically exhibit equilibria between their square and triangle structures.
BIO:
Dr. Grant was a member of the faculty of the UTC Department of Chemistry from 1980 until his retirement in 2012. He received his B.S. and Ph.D. degrees from Georgia Tech in 1974 and 1978, respectively, and he worked as an Instructor for two years at Spellman College in Atlanta, GA, before moving to UTC. His research interests include the synthesis of transition metal thioether complexes, supramolecular chemistry, transition metal NMR spectroscopy, and organometallic complexes of macrocyclic ligands, as documented in more than 60 peer-reviewed publications. Dr. Grant’s scholarship was recognized most recently with the 2011 ACS National Award for Research at an Undergraduate Institution.