Photophysical studies of aminoethylglycine-linked ruthenium-copper complexes

INOR 131

Carl P. Myers, mbw@chem.psu.edu and Mary Elizabeth Williams, mbw@chem.psu.edu. Department of Chemistry, The Pennsylvania State University, 104 Chemistry Research Building, University Park, PA 16802
We present the synthesis and characterization of aminoethylglycine (aeg) modified Ru(bpy)32+ compounds with pendant bipyridine ligands that are available for coordination to Cu2+. These compounds are capable of binding one or two Cu2+ centers through self-assembly in solution to create complexes capable of photoinduced electron transfer. Analogously to nucleic acid hairpin loops, we utilized a “hairpin” motif with two complementary peptide strands that are separated by a short linker. Peptide coupling chemistry allows for variations in desired heterometallic products and as such, we demonstrate synthetic strategies in peptide sequence length and metal complexity through standard peptide coupling techniques. Also, we study the dynamics of Cu2+ quenching on Ru(bpy)32+ emission as a function of ruthenium-copper distance and of temperature. Furthermore, we monitor the intermediate states through transient absorption spectroscopy.

 

General Inorganic Chemistry
2:00 PM-5:05 PM, Sunday, August 16, 2009 Walter E. Washington Convention Center -- 146A, Oral

Division of Inorganic Chemistry

The 238th ACS National Meeting, Washington, DC, August 16-20, 2009