Formation of Chiral Mesopores in Conducting Polymers by Chiral-Lipid-Ribbon Templating and “Seeding” Route

Authors


  • This work was supported by the National Natural Science Foundation of China (Grant No. 20425102 and 20521140450) and China Ministry of Education. OT thanks Swedish Science Research Council (VR) and Japan Science and Technology Agency (JST) for financial support and the Knut and Alice Wallenberg Foundation for the new EM instruments, and Sam Stevens (Manchester University) for critical reading. Supporting Information is available online from Wiley InterScience or from the authors.

Abstract

Conducting polymer nanofibers with controllable chiral mesopores in the size, the shape, and handedness have been synthesized by chiral lipid ribbon templating and “seeding” route. Chiral mesoporous conducting poly(pyrrole) (CMPP) synthesized with very small amount of chiral amphiphilic molecules (usually < 3%) has helically twisted channels with well-defined controllable pore size of 5–20 nm in central axis of the twisted fibers. The structure and chirality of helical mesopores have been characterized by high-resolution transmission electron microscope (HRTEM), scanning electron microscope (SEM) and electron tomography. The average pore diameters of chiral mesopores were approximately estimated from the N2 adsorption–desorption data and calculated by the conversion calculation from helical ribbons to a rectangular straight tape. The pore size of CMPP has been controlled by choosing different alkyl chain lengths of chiral lipid molecules or precisely adjusting the H2O/EtOH volume ratio.

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