CHED 264 |
| Two ruthenium and three osmium bipyridine analogues were synthesized with the general formula [M(bpy*)3](PF6)2 where bpy* = 2,2'-bipyridine, 4,4'-dimethyl-2,2'-bipyridine, 4,4'-diformyl-2,2'-bipyridine, or 4'-methyl-2,2'-bipyridine-4-carboxaldehyde. The ruthenium and osmium salts were purified via ion exchange column chromatography and characterized using 1H NMR, MALDI-TOF mass spectrometry, absorbance, and fluorescence spectroscopes. All of these systems displayed long-lived emission in the visible region of the spectrum with fluorescence bands between 550 and 650 nm. In addition, a 20-30 nm shift in the emission spectra was observed for the methyl substituted bipyridine ligands relative to their non-methylated analogues. The electronic tenability of the emission wavelengths of these complexes suggests that multiple tags may be used to image the same protein, eliminating the problem of overlapping emission. In addition, the inherent stability created by the tris-chelated framework makes them excellent candidates for mass markers in protein mass spectrometry experiments. |
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Undergraduate Research Poster Session: Inorganic Chemistry
2:30 PM-4:30 PM, Monday, 11 September 2006 Moscone Center -- Hall D, Poster
Division of Chemical Education |