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Issue 7, 2011
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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

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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

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Publication details

The article was received on 06 Jan 2011, accepted on 19 Apr 2011 and first published on 17 May 2011


Article type: Edge Article
DOI: 10.1039/C1SC00007A
Citation: Chem. Sci., 2011,2, 1389-1395
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    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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