Cyclic Co-oligomeric Ferroelectric Liquid Crystals with Fast Switching Properties, Wide SmC* Temperature Range and de Vries-type SmA*-SmC* Transition 


Vol. 32,  No. 8, pp. 3057-3062, Aug.  2011
10.5012/bkcs.2011.32.8.3057


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  Abstract

We have synthesized and characterized the first cyclic co-oligomeric ferroelectric liquid crystals (FLCs) based on cyclic siloxanes and found that the co-oligomer containing two different mesogenic units exhibits SmC* mesophase over a wide temperature range from 65 oC to 135 oC, much wider than those of the monomer counterparts and the cyclic homo-oligomers. The cyclic co-oligomeric liquid crystal readily filled the display cell and exhibited fast switching times in the range of 4 ms to 6 ms over the entire SmC* phase. Moreover, the practical absence of layer shrinkage, attributed to de Vries-type transition, shows an additional significant advanage for cyclic co-oligomeric FLCs in LCD applications.

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  Cite this article

[IEEE Style]

S. B. Park, T. Cho, K. Yoon, J. Y. Chang, R. Zentel, D. Y. Yoon, "Cyclic Co-oligomeric Ferroelectric Liquid Crystals with Fast Switching Properties, Wide SmC* Temperature Range and de Vries-type SmA*-SmC* Transition," Bulletin of the Korean Chemical Society, vol. 32, no. 8, pp. 3057-3062, 2011. DOI: 10.5012/bkcs.2011.32.8.3057.

[ACM Style]

Seung Beom Park, Tai-Yon Cho, Kyung-Hwan Yoon, Ji Young Chang, Rudolf Zentel, and Do Y. Yoon. 2011. Cyclic Co-oligomeric Ferroelectric Liquid Crystals with Fast Switching Properties, Wide SmC* Temperature Range and de Vries-type SmA*-SmC* Transition. Bulletin of the Korean Chemical Society, 32, 8, (2011), 3057-3062. DOI: 10.5012/bkcs.2011.32.8.3057.

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ISSN(Print) 0253-2964
ISSN(Online) 1229-5949