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The redox-controlled driven oscillatory template exchange between phosphate (P) and vanadate (V) anions enclosed in an X (2) M (18) cluster is reported. Extensive investigations using a range of techniques, including correlated ESI-MS, EPR, and UV-vis as a function of reaction time, showed that six complete oscillations interconverting the capsule species present in solution from P (2) M (18) to V (2) M (18) were possible, provided that a sufficient concentration of the TEA reducing agent was present in solution.
Miras et al. (Mon,) studied this question.