Issue 7, 2011

Horizontally and vertically aligned helical conjugated polymers: Comprehensive formation mechanisms of helical fibrillar morphologies in orientation-controlled asymmetric reaction fields consisting of chiral nematic liquid crystals

Abstract

Orientation-controlled asymmetric reaction fields consisting of chiral nematic liquid crystals (N*-LCs) were comprehensively studied to elucidate the formation mechanisms of horizontally and vertically aligned helical polyacetylenes (H-PAs). The alignment of the N*-LC was controlled by tuning the concentration of a chiral molecule added as a chiral dopant to a parent nematic LC and/or by using a rod-like molecule used as a vertical orientation inducer. It was found that the horizontal N*-LC gives rise to horizontally aligned H-PAs, and the vertical N*-LC consisting of two types of multilayered arrangements provides U- and V-shaped fibrillar morphologies of vertically aligned H-PAs. The observed formation mechanisms are useful for understanding asymmetric polymerisations of helical conjugated polymers prepared in chiral nematic or cholesteric liquid crystal reaction fields.

Graphical abstract: Horizontally and vertically aligned helical conjugated polymers: Comprehensive formation mechanisms of helical fibrillar morphologies in orientation-controlled asymmetric reaction fields consisting of chiral nematic liquid crystals

Supplementary files

Article information

Article type
Edge Article
Submitted
06 Jan 2011
Accepted
19 Apr 2011
First published
17 May 2011

Chem. Sci., 2011,2, 1389-1395

Horizontally and vertically aligned helical conjugated polymers: Comprehensive formation mechanisms of helical fibrillar morphologies in orientation-controlled asymmetric reaction fields consisting of chiral nematic liquid crystals

T. Mori, M. Kyotani and K. Akagi, Chem. Sci., 2011, 2, 1389 DOI: 10.1039/C1SC00007A

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