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Temperature- and Voltage-Induced Ligand Rearrangement of a Dynamic Electroluminescent Metallopolymer

Authors

  • Demet Asil,

    1. Department of Physics, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 OHE (UK)
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    • These authors contributed equally to this work.

  • Dr. Jonathan A. Foster,

    1. Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW (UK)
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    • These authors contributed equally to this work.

  • Dr. Asit Patra,

    1. Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW (UK)
    2. Current address: Organic & Hybrid Solar Cell, Physics of Energy Harvesting, CSIR-National Physical Laboratory, Dr. K. S. Krishnan Marg, New Delhi-110012 (India)
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  • Dr. Xavier de Hatten,

    1. Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW (UK)
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  • Dr. Jesús del Barrio,

    1. Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW (UK)
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  • Dr. Oren A. Scherman,

    1. Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW (UK)
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  • Prof. Jonathan R. Nitschke,

    Corresponding author
    1. Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW (UK)
    • Jonathan R. Nitschke, Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW (UK)===

      Richard H. Friend, Department of Physics, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 OHE (UK)===

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  • Prof. Richard H. Friend

    Corresponding author
    1. Department of Physics, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 OHE (UK)
    • Jonathan R. Nitschke, Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW (UK)===

      Richard H. Friend, Department of Physics, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 OHE (UK)===

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  • This work was supported by the European Research Council, the Middle East Technical University & Turkish Council of Higher Education, and the Schlumberger-Faculty for the Future Fellowship program (D.A.).

Abstract

A dynamic-covalent metal-containing polymer was synthesized by the condensation of linear diamine and dialdehyde subcomponents around copper(I) templates in the presence of bidentate phosphine ligands. In solution, the red polymers undergo a sol–gel transition upon heating to form a yellow gel, a process that can be either reversible or irreversible depending on the solvent used. When fabricated into a light-emitting electrochemical cell (LEC), the polymer emits infrared light at low voltage. As the voltage is increased, a blue shift in the emission wavelength is observed until yellow light is emitted, a process which is gradually reversed over time upon lowering the voltage. The mechanism underlying these apparently disparate responses is deduced to be due to loss of the copper phosphine complex from the polymer.

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