Bridge improvement work: Maximising non-linear optical performance in polyoxometalate derivatives

Claire F. Jones, Bethany R. Hood, Yovan de Coene, Ivan Lopez-Poves, Benoît Champagne, Koen Clays, John Fielden

Research output: Contribution to journalArticlepeer-review

Abstract

New phenyl and stilbene-bridged polyoxometalate (POM) charge-transfer chromophores with diphenylamino donor groups produce, respectively, the highest intrinsic and absolute quadratic hyperpolarisabilities measured for such species. The β0,zzz obtained for phenyl bridge – at 180 × 10-30 esu – is remarkable for a short conjugated system while changing to the stilbene (260 × 10-30 esu) produces a substantial increase in non-linearity for a minimal red-shift in the absorption profile. Together with TD-DFT calculations, the results show that maximising conjugation in the π-bridge is vital to high performance in such “POMophores”.
Original languageEnglish
Pages (from-to)1731-1734
JournalChemical Communications
Volume60
Issue number13
Early online date11 Jan 2024
DOIs
Publication statusPublished - 8 Feb 2024

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