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<p>Optical photothermal infrared response (O-PTIR) spectroscopy is an emerging technique of particular interest for examining the local chemistry and structure of organic molecular and polymer materials. Here, we used O-PTIR to examine the 3,4-ethylenedioxythiophene (EDOT) and maleimide-functionalized (EDOT-MA) monomers, and also thin films (~100&#xa0;nm) of their corresponding polymers (PEDOT and PEDOT-MA) electrochemically deposited on interdigitated (5&#xa0;μm) gold electrodes. The O-PTIR technique provided high-resolution (~ 1&#xa0;μm) information about the chemical structure, including the ability to map local variations in the composition of the MA side groups. Certain limitations were found, particularly in samples that were strongly optically absorbing.</p> Graphical abstract <p></p>

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Optical photothermal infrared response (O-PTIR) of functionalized thiophene monomers and polymers

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年8月6日

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  • Quintin Baugh,
  • Junghyun Lee,
  • Yuhang Wu,
  • Nurdan Cocuk,
  • David C. Martin

摘要

Optical photothermal infrared response (O-PTIR) spectroscopy is an emerging technique of particular interest for examining the local chemistry and structure of organic molecular and polymer materials. Here, we used O-PTIR to examine the 3,4-ethylenedioxythiophene (EDOT) and maleimide-functionalized (EDOT-MA) monomers, and also thin films (~100 nm) of their corresponding polymers (PEDOT and PEDOT-MA) electrochemically deposited on interdigitated (5 μm) gold electrodes. The O-PTIR technique provided high-resolution (~ 1 μm) information about the chemical structure, including the ability to map local variations in the composition of the MA side groups. Certain limitations were found, particularly in samples that were strongly optically absorbing.

Graphical abstract