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Issue 2, 2016
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Thermodynamic synthesis of solution processable ladder polymers

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The synthesis of a carbazole-derived, well-defined ladder polymer was achieved under thermodynamic control by employing reversible ring-closing olefin metathesis. This unique approach featured mild conditions and excellent efficiency, affording the ladder polymer backbone with minimum levels of unreacted defects. Rigorous NMR analysis on a 13C isotope-enriched product revealed that the main-chain contained less than 1% of unreacted precursory vinyl groups. The rigid conformation of the ladder-type backbone was confirmed by photophysical analysis, while the extended rod-like structure was visualized under scanning tunneling microscope. Excellent solubility of this polymer in common organic solvents allowed for feasible processing of thin films using solution-casting techniques. Atomic force microscopy and grazing incident X-ray scattering revealed a uniform and amorphous morphology of these films, in sharp contrast to the polycrystalline thin films of its small molecular counterpart.

Graphical abstract: Thermodynamic synthesis of solution processable ladder polymers

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The article was received on 02 Jul 2015, accepted on 05 Nov 2015 and first published on 06 Nov 2015

Article type: Edge Article
DOI: 10.1039/C5SC02385H
Citation: Chem. Sci., 2016,7, 881-889
  • Open access: Creative Commons BY-NC license
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    Thermodynamic synthesis of solution processable ladder polymers

    J. Lee, B. B. Rajeeva, T. Yuan, Z. Guo, Y. Lin, M. Al-Hashimi, Y. Zheng and L. Fang, Chem. Sci., 2016, 7, 881
    DOI: 10.1039/C5SC02385H

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