Close-packed polymer crystals from two-monomer-connected precursors

Hong-Joon Lee, Yong-Ryun Jo, Santosh Kumar, Seung Jo Yoo, Jin-Gyu Kim, Youn-Joong Kim, Bong-Joong Kim and Jae-Suk Lee ()
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Hong-Joon Lee: School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST)
Yong-Ryun Jo: School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST)
Santosh Kumar: School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST)
Seung Jo Yoo: Center for Electron Microscopy Research, Korea Basic Science Institute (KBSI)
Jin-Gyu Kim: Center for Electron Microscopy Research, Korea Basic Science Institute (KBSI)
Youn-Joong Kim: Center for Electron Microscopy Research, Korea Basic Science Institute (KBSI)
Bong-Joong Kim: School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST)
Jae-Suk Lee: School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST)

Nature Communications, 2016, vol. 7, issue 1, 1-6

Abstract: Abstract The design of crystalline polymers is intellectually stimulating and synthetically challenging, especially when the polymerization of any monomer occurs in a linear dimension. Such linear growth often leads to entropically driven chain entanglements and thus is detrimental to attempts to realize the full potential of conjugated molecular structures. Here we report the polymerization of two-monomer-connected precursors (TMCPs) in which two pyrrole units are linked through a connector, yielding highly crystalline polymers. The simultaneous growth of the TMCP results in a close-packed crystal in polypyrrole (PPy) at the molecular scale with either a hexagonal close-packed or face-centred cubic structure, as confirmed by high-voltage electron microscopy, and the structure that formed could be controlled by simply changing the connector. The electrical conductivity of the TMCP-based PPy is almost 35 times that of single-monomer-based PPy, demonstrating its promise for application in diverse fields.

Date: 2016
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DOI: 10.1038/ncomms12803

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