Nicholas H. Evans and Paul D. Beer at University of Oxford, describe in this paper the first example of a solution based redox-active interlocked host system capable of the electrochemical recognition of anions and most specifically chloride.
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A ferrocene functionalized rotaxane host system capable of the electrochemical recognition of chloride
Nicholas H. Evans and Paul D. Beer
Org. Biomol. Chem., 2011, 9, 92-100
DOI: 10.1039/C0OB00458H