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<p>Poly(p-phenylene vinylene) PPV derivatives represent a pivotal class of π-conjugated materials with promising applications in organic electronic devices such as OLEDs, OFETs, and OPVs. Despite their significance, understanding the structure–property relationships in PPV derivatives remains challenging, particularly for oligomers. In this study, we synthesized PPV derivative oligomers via ROMP. The oligomers exhibited molecular weights of 3.46 kDa and 6.16 kDa, demonstrating well-controlled polymerization. The incorporation of alkyl side chains onto the oligomer backbone enhanced solubility and refined optical properties. UV–Vis analysis determined the optical band gaps (Eg<sup>op</sup>) of the synthesized oligomers to range from 2.14 to 2.47 eV. Furthermore, TGA revealed two-step decomposition processes with onset decomposition temperatures (Td, onset) of 221.8°C and 218.5°C, and thermal decomposition maximum temperatures (Td, max) at 356.8°C and 324.0°C for Oligo-DO-PPV and Oligo-TO-PPV, respectively. These findings underscore the potential of ROMP as a versatile approach for tailoring PPV oligomers and provide critical insights into their structure–property relationships. This work advances our understanding of PPV oligomers, paving the way for future applications in optoelectronic devices.</p> Graphical abstract <p></p>

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Controlled synthesis of PPV oligomers by ROMP: impact on optical, structural, and thermal properties

  • 期刊论文

  • 发表日期：

    2025年5月22日

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  • Mahmoud Z. Basyouni,
  • Keisuke Nomura,
  • Yuto Goroumaru,
  • Mohammed F. Radwan,
  • Mohamed E. Abdu,
  • Andrew M. Spring

摘要

Poly(p-phenylene vinylene) PPV derivatives represent a pivotal class of π-conjugated materials with promising applications in organic electronic devices such as OLEDs, OFETs, and OPVs. Despite their significance, understanding the structure–property relationships in PPV derivatives remains challenging, particularly for oligomers. In this study, we synthesized PPV derivative oligomers via ROMP. The oligomers exhibited molecular weights of 3.46 kDa and 6.16 kDa, demonstrating well-controlled polymerization. The incorporation of alkyl side chains onto the oligomer backbone enhanced solubility and refined optical properties. UV–Vis analysis determined the optical band gaps (Egop) of the synthesized oligomers to range from 2.14 to 2.47 eV. Furthermore, TGA revealed two-step decomposition processes with onset decomposition temperatures (Td, onset) of 221.8°C and 218.5°C, and thermal decomposition maximum temperatures (Td, max) at 356.8°C and 324.0°C for Oligo-DO-PPV and Oligo-TO-PPV, respectively. These findings underscore the potential of ROMP as a versatile approach for tailoring PPV oligomers and provide critical insights into their structure–property relationships. This work advances our understanding of PPV oligomers, paving the way for future applications in optoelectronic devices.

Graphical abstract