Stepwise Sequential Redox Potential Modulation Possible on a Single Platform


  • This work was supported by the Generalitat de Catalunya (2009/SGR/00279) and the Ministerio de Ciencia e Innovación (CTQ2010-16237). A. Pepiol thanks the CSIC for a JAE grant and M. Lupu thanks the MICINN for a FPU grant. A. Pepiol and M. Lupu are enrolled in the UAB PhD program. We thank Mireia Ruis and Elena Marchante for performing the electrochemical tests.


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Step by step: The cluster [3,3′-Co(1,2-C2B9H11)2] is an excellent platform for making a stepwise tunable redox potential system by dehydroiodination. With the addition of up to eight iodine substituents (purple; see picture), there is a fall in the E1/2(CoIII/CoII) value from −1.80 V to −0.68 V (vs. Fc+/Fc; Fc=ferrocene). A practical application of this tunability has been observed in the growth of polypyrrole.