Authors:

Reed M Woolard

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About Paper:

Conjugated ladder polymers are distinct from conventional polymers as their repeating units are attached by two bonds to each other, giving them a double-stranded and ladder-like structure. When these polymers have uninterrupted conjugation in their backbone, they are categorised as conjugated ladder polymers. The polymers of this type have greater thermal stability and often give more delocalised polarons in their doped state, thanks to their rigid and planar structure. However, the design and synthesis of new conjugated ladder polymers are challenging because of their rigid fused backbone and double-stranded structure, which require harsh reaction conditions and result in mostly insoluble polymers. In this study, we investigated the degradation of the highly conductive polymer n-PBDF followed by reformation into a conjugated ladder polymer PCCD via UV-VIS-NIR photospectrometry, NMR spectroscopy, and mass spectrometry. Well-defined small molecule study confirms that under the same degradation conditions, BDF-based oligomers also degrade and reform into CCD-based ladder oligomers. Despite being a ladder-type conjugated polymer, PCCD showed fused ring opening and closing reversibility, which is also confirmed in CCD-based ladder oligomers, giving the polymer recyclability. Keywords: [no keywords provided]

Source:

Purdue University / 2025

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Co-authors:

Reed M Woolard