Oscillatory Template Exchange
in Polyoxometalate Capsules:
A Ligand-Triggered, Redox-Powered, Chemically Damped Oscillation
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Abstract
The redox-controlled driven oscillatory template exchange
between
phosphate (P) and vanadate (V) anions enclosed in an {X<sub>2</sub>M<sub>18</sub>} 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<sub>2</sub>M<sub>18</sub>} to {V<sub>2</sub>M<sub>18</sub>} were possible,
provided that a sufficient concentration of the TEA reducing agent
was present in solution
