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Issue 32, 2014
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Water oxidation catalysts and pH sensors based on azo-conjugated iridium/rhodium motifs

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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

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Publication details

The article was received on 16 Feb 2014, accepted on 09 Mar 2014 and first published on 12 Mar 2014


Article type: Paper
DOI: 10.1039/C4DT00491D
Author version available: Download Author version (PDF)
Citation: Dalton Trans., 2014,43, 12221-12227
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    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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