The lifetime for the CN - stretching mode has been measured at a polycrystalline Cu and Cu(111) electrochemical interface with difference frequency generation. The lifetimes on both surfaces are ∼17 ps, show no definitive trend with electrochemical potential, and are similar to those reported for the CN - /Au system. When all experimental lifetimes for CN - on metals are considered, a trend is noted between vibrational lifetime and the onset of metal interband transitions.
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Matranga et al. (2002) studied this question.
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