Heterogeneous catalysis of water oxidation supported by a novel metallamacrocycle. (14th January 2016)

• Record Type: Journal Article
• Authors: Yu, Wei-Bin; He, Qing-Ya; Shi, Hua-Tian; Wei, Xianwen
• Is Part Of: New journal of chemistry. Volume 40:Number 3(2016:Mar.)
• Page Start: 2354
• Page End: 2361
• Publication Date: 2016-01-14
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/c5nj02931g
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : Metallamacrocycles1 and2 were constructed, and1 was further explored as a precatalyst for water oxidation, giving a good efficiency. Abstract : The rational design and syntheses of the new tetranuclear macrocycles [Cp*Ir(L)]4 (OTf)4 (1 ) and [Cp*Rh(L)]4 (OTf)4 (2 ) were successfully achieved through the reaction of pyridyl-substituted ligand 3-(pyridin-3-ylazo)-naphthalen-2-ol (HL) with [Cp*M( μ -Cl)Cl]2 (M = Ir, Rh), which was preliminarily treated with AgOTf. The novel macrocycles1 and2 were structurally characterized by EA, IR and NMR to confirm their elementary components and frameworks. Further classification of their molecular structures via single crystal X-ray analysis has strongly proved their tetranuclear macrocyclic structures. The systematic investigation of the electronic properties of complex1 via cyclic voltammograms (CVs), clearly suggested that it had great potential application as a catalyst for water oxidation. Thus the use of complex1 as a catalyst for water oxidation was performed in the presence of sacrificial chemical oxidation, and afforded a good efficiency of up to 2.47 min −1 .