Catalytic water oxidation by an in situ generated ruthenium nitrosyl complex bearing a bipyridine-bis(alkoxide) ligand. Issue 35 (17th August 2021)

• Record Type: Journal Article
• Authors: Liu, Yingying; Ng, Siu-Mui; Yiu, Shek-Man; Lau, Tai-Chu
• Is Part Of: Dalton transactions. Volume 50:Issue 35(2021)
• Page Start: 12316
• Page End: 12323
• Publication Date: 2021-08-17
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d1dt01918j
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : A ruthenium(iii ) water oxidation catalyst bearing a bipyridine-bis(alkoxide) ligand is readily converted by (NH4 )2 [Ce(NO3 )6 ] to a ruthenium(ii ) nitrosyl complex which is also an active water oxidation catalyst. Abstract : Oxidative degradation and transformation of catalysts are commonly observed in water oxidation by molecular catalysts, especially when a highly oxidizing reagent such as (NH4 )2 [Ce(NO3 )6 ] [Ce(iv )] is used. We report herein the synthesis of a ruthenium(iii ) complex bearing an oxidative resistant bipyridine-bis(alkoxide) ligand, [Ru(bdalk)(pic)2 ] + (1, H2 bdalk = 2, 2′-([2, 2′-bipyridine]-6, 6′-diyl)bis(propan-2-ol), pic = 4-picoline) as a water oxidation catalyst (WOC). A ruthenium(ii ) nitrosyl complex [Ru(Hbdalk)(NO)(pic)2 ] 2+ (3 ) was also formed during the water oxidation process by 1 /Ce(iv ), and was isolated and structurally characterized. Complex 3 was found to be an active WOC, with the nitrosyl group remaining intact during water oxidation.