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Triazatruxene-containing hyperbranched polymers: Microwave-assisted synthesis and optoelectronic properties

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  • SPECIAL TOPIC · Highly Branched Polymers — Promising Architectural Macromolecules
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Abstract

Hyperbranched polymer structures represent a class of high-functionality building blocks with excellent three-dimensional topology for the construction of highly substituted conjugated polymers. In this contribution, an efficient microwave synthesis protocol toward the synthesis of conjugated hyperbranched polymers is presented. A novel series of soluble hyperbranched polyfluorenes (PTF1-PTF3) incorporating triazatruxene moiety as the branch units with various branching degrees have thus been successfully constructed with good yields and high molecular weight via a facile “A2+B2+C3” approach. The structures of the hyperbranched polymers were confirmed by NMR and GPC. Their thermal, optical, and electrochemical properties of the hyperbranched polymers were also investigated. The results showed that introduction of triazatruxene units into the hyperbranched structure endowed the polymer with good thermal stability and highly amorphous properties. Photophysical investigation of PTFx revealed strong blue emission in both solution and solid states. Hyperbranched polymers with higher degree of branching and proper content of linear fluorene units exhibited better photophysical properties in terms of narrow emission spectra and relatively high quantum efficiency as well as improved thermal spectral stability. The triazatruxene branching unit also played a role in raising the HOMO energy levels relative to those of polyfluorenes that would help to improve the charge injection and transport properties. The incorporation of triazatruxene unit into hyperbranched polymers has thus explored an effective avenue for constructing optoelectronic polymers with improved functional characteristics.

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Authors and Affiliations

  1. Key Laboratory for Organic Electronics & Information Displays (KLOEID); Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, Nanjing, 210046, China

    WenYong Lai, Dong Liu & Wei Huang

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  1. WenYong Lai
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  2. Dong Liu
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  3. Wei Huang
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Correspondence to WenYong Lai or Wei Huang.

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Lai, W., Liu, D. & Huang, W. Triazatruxene-containing hyperbranched polymers: Microwave-assisted synthesis and optoelectronic properties. Sci. China Chem. 53, 2472–2480 (2010). https://doi.org/10.1007/s11426-010-4152-3

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  • DOI: https://doi.org/10.1007/s11426-010-4152-3

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