Wednesday, 16 May 2007
3rd Floor Hall (Pfahler Hall)
175

Synthesis of substituted tris(dibenzylideneacetone)dipalladium(0) complexes and their use in Suzuki Coupling Polymerizations

Jennifer W. Eddy and Felix E. Goodson. West Chester University, West Chester, PA

Conjugated polymers are of interest due to their technologically useful properties, including liquid crystallinity, photo- and electroluminescence, and electrical conductivity. One of the most common methods of synthesis for these materials is the Suzuki Coupling Polymerization. Unfortunately, most recent examples of this polymerization use a traditional catalyst system that results in mediocre molecular weights. The goal of the research presented here is to use a recently developed, convenient monomer synthesis to perform optimization studies in order to maximize the molecular weights formed in Suzuki Coupling Polymerizations. This was attempted by synthesizing various dibenzylideneacetone ligands with substituents of varying electron donating or withdrawing ability, synthesizing different palladium complexes using these new dibenzylideneacetone derivatives, and comparing how these complexes function as catalyst precursors with respect to the standard tris(dibenzylideneacetone)dipalladium(0) (Pd2dba3) system. The preliminary data collected for this experiment show that electron withdrawing groups on the palladium complex provide polymers with higher molecular weights than catalyst precursors with electron neutral or electron donating groups.

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