Issue 32, 2014

Water oxidation catalysts and pH sensors based on azo-conjugated iridium/rhodium motifs

Abstract

Herein we report the molecular structures and electronic properties of ionic, hydrophobic half-sandwich complexes with formula [η5-Cp*Ir(L)(Cl)](OTf) (1), [η5-Cp*Rh(L)(Cl)](OTf) (2), [η5-Cp*Ir(L)(H2O)](OTf)2 (3) and [η5-Cp*Rh(L)(H2O)](OTf)2 (4), where L is 1-(2-pyridylazo)-2-naphthol. The electrochemical properties of these complexes have been investigated, and they displayed good electronic properties for use as water oxidation catalysts. Interestingly, the color of their solutions is unambiguously transformed from brown to green at pH = 12; the color changes of 1, 2 and 4 are especially apparent. For this reason, their use as pH sensors for detecting solution pH values can be explored.

Graphical abstract: Water oxidation catalysts and pH sensors based on azo-conjugated iridium/rhodium motifs

Supplementary files

Article information

Article type
Paper
Submitted
16 Feb 2014
Accepted
09 Mar 2014
First published
12 Mar 2014

Dalton Trans., 2014,43, 12221-12227

Author version available

Water oxidation catalysts and pH sensors based on azo-conjugated iridium/rhodium motifs

W. Yu, Q. He, H. Shi, Y. Pan and X. Wei, Dalton Trans., 2014, 43, 12221 DOI: 10.1039/C4DT00491D

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