Bimetallic cooperative effect on O–O bond formation: copper polypyridyl complexes as water oxidation catalyst
The performance of water oxidation catalysis by a Cu-based polypyridyl complex,[CuII
(TPA)(OH2)] 2+(1H; TPA= tris-(pyridylmethyl) amine), has been investigated in neutral
aqueous solution by electrochemical methods. Compared with our previously reported
binuclear catalyst,[(BPMAN)(CuII) 2 (μ-OH)] 3+(2; BPMAN= 2, 7-[bis (2-pyridylmethyl)
aminomethyl]-1, 8-naphthyridine), mononuclear catalyst 1 has a higher overpotential and
lower catalytic activity toward water oxidation under the same conditions. Experimental …
(TPA)(OH2)] 2+(1H; TPA= tris-(pyridylmethyl) amine), has been investigated in neutral
aqueous solution by electrochemical methods. Compared with our previously reported
binuclear catalyst,[(BPMAN)(CuII) 2 (μ-OH)] 3+(2; BPMAN= 2, 7-[bis (2-pyridylmethyl)
aminomethyl]-1, 8-naphthyridine), mononuclear catalyst 1 has a higher overpotential and
lower catalytic activity toward water oxidation under the same conditions. Experimental …
The performance of water oxidation catalysis by a Cu-based polypyridyl complex, [CuII(TPA)(OH2)]2+ (1H; TPA = tris-(pyridylmethyl)amine), has been investigated in neutral aqueous solution by electrochemical methods. Compared with our previously reported binuclear catalyst, [(BPMAN)(CuII)2(μ-OH)]3+ (2; BPMAN = 2,7-[bis(2-pyridylmethyl)aminomethyl]-1,8-naphthyridine), mononuclear catalyst 1 has a higher overpotential and lower catalytic activity toward water oxidation under the same conditions. Experimental results revealed that the O–O bond formation occurred via a water nucleophilic attack mechanism in which formal CuIV(O) is proposed as a key intermediate for the mononuclear catalyst 1H. In contrast, for the binuclear catalyst, O–O bond formation was facilitated by bimetallic cooperation between the two CuIII centers.
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