Abstract
Photoexcitation of a bis(bipyridyl)-Ru(II) complex bearing a phosphinopentathiophene ligand results in formation of a transient species with a lifetime of 2.2 ms. The transient is attributed to the product of an intramol. charge transfer from the pentathiophene ligand. EPR and UV/vis spectroelectrochem. show that the HOMO is pentathienyl-based, while corresponding complexes with shorter conjugation length ligands have a metal-based HOMO and do not exhibit long-lived transients. [on SciFinder(R)]
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