Electron-Donating para-Substituent (X) Enhances the Water Oxidation Activity of the Catalyst Ru(4′-X-terpyridine)(phenanthroline-SO3)+ | Inorganic Chemistry pubs.acs.org/doi/10.1021/... Musaev, Grotjahn, and co-workers @InorgChem #ruthenium #phenSO3 #X_terpy #WOC #PCET #ETPTs