INOR 320 |
| This work is in the context of the “Research for the Classroom” program that Omary implements as supported by NSF for his CAREER award. The idea of the “Big Picture” project is to emulate contemporary research during the inorganic chemistry teaching laboratory. The “Big Picture” a finite research problem that the various syntheses and characterization methods are combined to solve, as successfully done in the literature for the “known component” and as is hoped to be duplicated for the “discovery component”. This poster overviews work done by groups who tackled silver chemistry during Spring-2006 and Spring-2007. The compilation of the structural, spectroscopic, and computational data in this project suggested that a variety of 4-coordinate [AgL4]Y complexes (L = phosphine; Y counterion) should exhibit a new type of Jahn-Teller distortion such that the Ag(I) complexes rearrange from a tetrahedral ground state to a sea-saw phosphorescent excited state. The extent of distortion can be controlled by the steric bulk of the ligand such that lower-energy Ag-centered emissions are seen with sterically-unencumbered phosphine ligands. The 4-coordinate geometry in all complexes studies was found to be favored over 3-coordinate even when 3:1 L:Ag ratios were added. The emissions were seen mostly at 77 K for the single crystals made while strategies to sensitize the emissions at RT in the solid state will be discussed based on utilizing luminescent free ligands. |
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Spectroscopy of Inorganic Systems
7:00 PM-10:00 PM, Sunday, August 19, 2007 BCEC -- Exhibit Hall - B2, Poster
Sci-Mix
Division of Inorganic Chemistry |