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Synthesis and prototyping of coloured electrochromic inks for displays and applications

Fletcher-Charles, Jack 2022. Synthesis and prototyping of coloured electrochromic inks for displays and applications. PhD Thesis, Cardiff University.
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Abstract

This thesis introduces the concept of electrochromism, touches on the history of research into electrochromic material, and then discusses the current state of the art with regards to organic electrochromic materials. Within this area of research two families of materials can be found: small molecules, and polymers. The work performed within this thesis expands the research of both organic electrochromic families, with the synthesis of both polymeric and small molecule electrochromic materials performed. Chapter 2 focusses on the synthesis of a colourless to black electrochromic polymer. This work exploits electrochromic pendent moieties bound to an electrochemically inert polymer backbone and follows two pathways: multiple electrochromic pendent groups which possess different colourless to coloured transitions that combine to create an overall colourless to black colour change seen by the human eye; and a single electrochromic pendent which possesses a colourless to black transition but upon grafting to a polymer has more appropriate processability properties for the fabrication of electrochromic devices. Chapter 3 then focusses on the synthesis of oxygen-doped small molecules possessing pyrano and oxepin moieties. This work attempts the synthesis of an anthracene-based molecule which possesses four pyrano moieties with the aims of creating molecule that is both electrochromic and an oxygen sensitizer. Additional work performed in this chapter attempted the synthesis of oxepin containing molecules with the aims of obtaining new molecules which possess electrochromic properties. This work focussed on the possible synthesis of oxepin-containing molecules using a copper mediated etherification reaction which is a fairly novel way to obtain such moieties, with only one example reported in literature obtaining an oxepin ring using this method.

Item Type: Thesis (PhD)
Date Type: Completion
Status: Unpublished
Schools: Chemistry
Funders: H2020-RIA Decochrom Project
Date of First Compliant Deposit: 28 April 2023
Last Modified: 06 Jan 2024 04:19
URI: https://orca.cardiff.ac.uk/id/eprint/159102

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