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Anthony Tomcykoski
Elayna Weller
Wayne E. Jones Jr.
Ru(II) phenanthroline chemosensors containing hemilabile chelates in response to neutral molecule analytes
Luminescent polypyridyl ruthenium(II) coordination complexes are well established photosensitive materials with applications in sensing, photovoltaics,
and catalysis. Current chemosensor complexes containing hemilabile ligands have exploited the luminescent characteristics of the [Ru(bpy)3]+2 base
structure while taking advantage of the unique binding ability of hemilabile phosphine-ether chelates. These assemblies have been shown to be sensitive,
selective, and reversible. Coordination complexes of [Ru(bpy)2P,OMe](PF6)2 have demonstrated a photophysical response in both emission maxima and excited
state lifetimes to an array of neutral Lewis basic analytes such as water. We have been exploring extended aromatic Ru(II) photosystems to create room
temperature luminescent hemilabile complexes. Work on [Ru(φphen)2P,OMe](PF6)2 in ethanol solution shows a 28nm λmax red shift in absorbance upon the
addition of 300 equivalents of TEA. Evidence supports these complexes function as receptor materials for neutral or anionic donors including carbon
monoxide and cyanide. Here we will present the synthesis, characterization, and applications for hemilabile coordination complexes.
References
1) Rogers, C.W.; Wolf, M.O. Chem. Comm. 1999, 2297.
2) Angell, S.E.; Zhang, Y.; Rogers, C.W.; Wolf, M.O.; Jones, W.E. Inorg. Chem. 2005, 44, 7377.
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