Fig. 8: Resonance Raman spectroscopy of complexes 1–4 and references.

RR spectra of 1 and 2 in acetonitrile upon excitation at 405 nm (a) and 473 nm (d). RR spectra of 3 and 4 in acetonitrile excited at 405 nm (b) and 473 nm (e). RR spectrum of [(tbbpy)2Ru(phen)]2+, excited at 405 nm (c) and 473 nm (f) for comparison. Characteristic Raman modes assigned to bipyridine, phenanthroline and alkyne are highlighted in blue, yellow and purple, respectively.