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- The study discusses a mononuclear ruthenium complex, [Ru(tpy)(bpg)HO], which acts as an effective catalyst for water oxidation at pH 1, utilizing Ce(IV) as a sacrificial oxidant.
- This new complex exhibits a turnover number (TON) for water oxidation that is approximately five times greater than its predecessor, [Ru(tpy)(bpy)HO].
- The enhanced catalytic performance is attributed to the intermolecular hydrogen bonding and the electronic effects of the functionalized bipyridine ligand within the complex.
Article Abstract
A mononuclear ruthenium complex [Ru(tpy)(bpg)HO] bearing a bipyridine glycoluril where bpg = 4b,5,7,7a-tetrahydro-4b,7a-nepiminomethanoimino-6H-imidazo[4,5-f][1,10]phenanthro-line-6,13-dione acts as a robust water oxidation catalyst (WOC) at pH = 1 using Ce(iv) as a sacrificial oxidant. The turn over number (TON) for water oxidation is found to be ∼5 times higher than the parent complex [Ru(tpy)(bpy)HO] where tpy = 2,2':6',2''-terpyridine; bpy = 2,2'-bipyridine. The presence of intermolecular H-bonding groups and the electronic effect of the functionalized bipyridine ligand may play a significant role in water oxidation.
