Abstract
In this study palladium-catalysed oscillatory carbonylation has been achieved using mono alkyne-terminated poly(ethylene glycol) methyl ether substrates. Reproducible, synchronised oscillations in pH and solution turbidity have been recorded over several days. A reaction network accounting for the observed phenomena has been proposed.
Highlights
The functional polymer alkyne-terminated poly(ethylene glycol) is a viable substrate for oscillatory carbonylation reactions
By replacing the acetylene substrate with a soluble polymeric analogue, mono alkyne-terminated poly(ethylene glycol) methyl ether (PEGA), reproducible oscillations in both pH and solution turbidity are observed at catalyst concentrations two orders of magnitude lower than routinely used
For each oscillatory run a catalyst solution consisting of palladium(II) iodide and potassium iodide in methanol was equilibrated to 20 1C and a baseline pH value established
Summary
The functional polymer alkyne-terminated poly(ethylene glycol) is a viable substrate for oscillatory carbonylation reactions. Synchronised oscillations in pH and solution turbidity are recorded over several days, opening new avenues in the area of fully autonomous oscillatory (pulsatile) materials. In this study palladium-catalysed oscillatory carbonylation has been achieved using mono alkyne-terminated poly(ethylene glycol) methyl ether substrates.
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