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UBC Theses and Dissertations

Some chiroptical effects on the photophysics and photochemistry of tris(bipyridine)ruthenium(II) ions in solution Sparks, Robert Henry


The photoracemization of Ru(bipy)₃⁺⁺ in aqueous solution was studied. Quenching studies show the involvement of the (CT)³ Ru(bipy)₃⁺⁺ in the mechanism of racemization and the low quantum yield (2.9 x 10⁻⁴) shows that this state is asymmetric. Quenching studies show no increase of racemization rate for Ru(I) or (III) species. The temperature dependence gives evidence for a dissociative racemization mechanism. Quenching with Co(acac)₃ shows chiroselective electron transfer as measured by the resulting photochemistry.

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