Facile Synthesis of Solubilizing Group Free, Solution-Processable p-Type Ladder Conjugated Polymer and Its Thermoelectric Properties

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Facile Synthesis of Solubilizing Group Free, Solution-Processable p-Type Ladder Conjugated Polymer and Its Thermoelectric Properties
Title:
Facile Synthesis of Solubilizing Group Free, Solution-Processable p-Type Ladder Conjugated Polymer and Its Thermoelectric Properties
Other Titles:
ACS Macro Letters
Publication Date:
28 December 2021
Citation:
Tam, T. L. D., Lin, M., Chien, S. W., & Xu, J. (2021). Facile Synthesis of Solubilizing a Group-Free, Solution-Processable p-Type Ladder Conjugated Polymer and Its Thermoelectric Properties. ACS Macro Letters, 11(1), 110–115. https://doi.org/10.1021/acsmacrolett.1c00696
Abstract:
Here we report the synthesis of a new solubilizing group-free, solution-processable p-type ladder conjugated polymer, 6H-pyrrolo[3,2-b:4,5-b′]bis[1,4]benzothiazine ladder (PBBTL) polymer by using a polyphosphoric acid (PPA) and phenylphosphonic acid (PhPO3H2) 1:1 binary acid solvent system together with careful control of reaction kinetics. With a good intrinsic viscosity of 3.69 dL/g in methanesulfonic acid (MSA), good quality PBBTL films can be obtained via spin-coating. Intrinsic thin film properties and thermoelectric performance of PBBTL were evaluated, making it the second solubilizing group-free, solution-processable ladder-type conjugated polymer after BBL to be used for thin-film polymer electronics. While our preliminary thermoelectric performance of the FeCl3-doped PBBTL films is modest, we believe that many opportunities lie ahead for PBBTL and hope that its successful synthesis using the new PPA:PhPO3H2 binary acid solvent system will inspire synthetic organic chemists to relook into solubilizing group-free, solution-processable ladder-type conjugated polymer systems.
License type:
Publisher Copyright
Funding Info:
This research / project is supported by the A*STAR - SERC Thermoelectric Materials Programme
Grant Reference no. : 1527200019

This research / project is supported by the A*STAR - SERC Thermoelectric Materials Programme
Grant Reference no. : 1527200021

This research / project is supported by the A*STAR - SERC Agritech Programme
Grant Reference no. : A19D9a0096
Description:
This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Macro Letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acsmacrolett.1c00696
ISSN:
2161-1653
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