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Electrochemical Switch‐On of Nonlinear Optical Response in a Nitro‐Functionalized Arylimido‐Polyoxometalate

Year: 2026

Type: article

Abstract: ABSTRACT Electrochemical switch‐on of second‐order non‐linear optical (NLO) responses ( β ) has been demonstrated in a polyoxometalate (POM) based chromophore (POMophore) for the first time. Reduction of the POM in a POM‐imidoaryl‐NO 2 derivative invokes an up to 15‐fold off/on switchable increase in intensity of scattered frequency‐doubled light, and the highest “on” state β yet reported for a redox‐cyclable POMophore. Computational and spectroscopic studies show that in the oxidized state, directionally opposed charge transfer (CT) transitions to POM and ─NO 2 result in a low net β . Upon reduction, the POM becomes a much weaker CT acceptor, resulting in more dipolar imido‐aryl to nitro CT, and thus enhanced NLO response.

Source: Angewandte Chemie International Edition

DOI: 10.1002/anie.4949539

Authors: Claire F. Jones, Bethany R. Hood, Yovan de Coene, Hayleigh Kearns, Karen Faulds, Benoît Champagne, Koen Clays, John Fielden

Institutions: University of East Anglia, Lancaster University, KU Leuven, University of Strathclyde, University of Namur, Namur Institute of Structured Matter

Language: English

Topic: Nonlinear Optical Materials Research

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $5,510

Funders: Lancaster University, Leverhulme Trust, University of East Anglia, Fonds Wetenschappelijk Onderzoek, Engineering and Physical Sciences Research Council, Biotechnology and Biological Sciences Research Council

Awards: Optical Detection of Listeria in the Chilled Food Environment using Bionanosensors, Polyoxometalate-Based Sensitizers for p-Type Dye-Sensitized Solar Cells, G3107011372, G7957863203, Pushing the boundaries of third harmonic generation, Application by the School of Chemistry and the School of Pharmacy, University of East Anglia, for enhanced single-crystal X-ray diffraction facilities

OpenAlex ID: W7166739090

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Cites: 55

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