Electrochemically-switched 2nd order non-linear optical response in an arylimido-polyoxometalate with high contrast and cyclability

Bethany Rose Hood, Yovan de Coene, Afonso Vieira Torre Do Vale Froes, Claire Jones, Pierre Beaujean, Vincent Liegois, Fraser MacMillan, Benoit Champagne, Koen Clays, John Fielden

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Abstract

Electrochemically switched 2nd order non-linear optical responses have been demonstrated for the first time in polyoxometalates (POMs), with an arylimido-derivative showing a leading combination of high on/off contrast (94%), high visible transparency, and cyclability. Spectro-electrochemical and TD-DFT studies indicate that the switch-off results from weakened charge transfer (CT) character of the electronic transitions in the reduced state. This represents the first study of an imido-POM reduced state, and demonstrates the potential of POM hybrids as electrochemically activated molecular switches.
Original languageEnglish
JournalAngewandte Chemie International Edition
Early online date30 Nov 2022
DOIs
Publication statusE-pub ahead of print - 30 Nov 2022

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