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Complexes Ru–C and Os–G are derivatives of [Ru(bipy)3]2+ and [Os(bipy)3]2+ bearing peripheral cytosine (C) or guanine (G) nucleobases respectively; in CH2Cl2 these undergo association (KA > 5000 dm–3 mol–1) by hydrogen bonding between the complementary C/G groups, and Ru → Os photoinduced energy-transfer occurs within Ru–C···G–Os associated pair.
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Armaroli et al. (1997) studied this question.
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