Phase Behavior of Symmetric Y-Shaped Molecules

WANG Hui

doi:10.3788/YJYXS20112603.0301

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Phase Behavior of Symmetric Y-Shaped Molecules

Material Physics & Chemistry | 更新时间：2020-08-12

- Phase Behavior of Symmetric Y-Shaped Molecules
- Chinese Journal of Liquid Crystals and Displays Vol. 26, Issue 3, Pages: 301-305(2011)
- 作者机构：
  
  解放军理工大学理学院,江苏南京,211101
- 作者简介：
- 基金信息：
- DOI：10.3788/YJYXS20112603.0301
  CLC： O753+.2
- Received：14 December 2010，
  
  Revised：01 March 2011，
  
  Published Online：20 June 2011，
  
  Published：20 June 2011
- 稿件说明：
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王慧. 对称Y型分子向列相液晶的相变[J]. 液晶与显示, 2011,26(3): 301-305

WANG Hui. Phase Behavior of Symmetric Y-Shaped Molecules[J]. , 2011,26(3): 301-305
王慧. 对称Y型分子向列相液晶的相变[J]. 液晶与显示, 2011,26(3): 301-305 DOI： 10.3788/YJYXS20112603.0301.

WANG Hui. Phase Behavior of Symmetric Y-Shaped Molecules[J]. , 2011,26(3): 301-305 DOI： 10.3788/YJYXS20112603.0301.

摘要

在V型双轴性向列相液晶分子的基础上构造一对称Y型分子

并将其抽象为呈"Y"状排列的三刚性分子长棒

考虑棒与棒间的简单相互作用的叠加

得到了分子间的相互作用能。利用平均场理论

得到系统的自由能与序参数之间的函数关系

并给出了在一定温度下系统从各向同性相至单轴相以及从单轴相至双轴相相变的相图。

Abstract

Based on the V-shaped molecule of biaxial nematic liquid crystal

a model of symmetric Y-shaped molecule is developed. In this model the Y-shaped molecule is abstracted to three linked rod-like arms. Using a simple biaxial molecular interaction model in nematic liquid crystal

the interaction energy between two molecules is obtained by the superposition of all rod-to-rod interactions. With the mean field approximation

the free energy of the system is derived and the result shows that the free energy is the function of order parameters. The relationship between the Y-shaped molecule and its ability to form a biaxial nematic phase is established. And phase transitions from isotropic to uniaxial nematic (NI phase transition) and from uniaxial to biaxial nematic(IB phase transition) are obtained.

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references

Freiser M J. Ordered states of a nematic liquid [J]. Phys. Rev. Lett., 1970, 24(19):1041-1043.[2] Yu L J, Saupe A. Observation of a biaxial nematic phase in potassium laurate-1-decanol-water mixtures[J]. Phys. Rev. Lett., 1980, 45(12):1000-1003.[3] Madsen L A,Dingemans T J. Thermotropic biaxial nematic liquid crystals [J]. Phys. Rev. Lett., 2004. 92(14):145505(1-4).[4] 马青兰,黄远明.三苯环香蕉形液晶的合成和表征[J]. 液晶与显示, 2010,25(2):161-165.[5] 朱斌,黄佩,胡兰萍,等.含希夫碱基团的不对称弯曲型液晶分子的合成和相变研究[J]. 液晶与显示, 2010,25(3):305-310.[6] Bates M A,Luckhurst G R.Biaxial nematic phases and V-shaped molecules: A Monte Carlo simulation study[J]. Phys. Rev. E,2005,72(5):051702(1-15).[7] Park M S,Yoon B J,Park J O,et al.Raman scattering study of phase biaxiality in a thermotropic bent-core nematic liquid crystal [J]. Phys.Rev.Lett.,2010,105(2):027801(1-4).[8] 刘红,王慧.双轴性向列相液晶的相变理论[J]. 物理学报, 2005,54(3):1306-1312.[9] 李策,郑桂丽,张志东.双轴向列相液晶中Landau点的确定 [J]. 液晶与显示, 2009,24(3):333-339.[10] 黄青颖.V型分子液晶的相变理论 .南京:南京师范大学,2008.[11] Acharya B R,Primak A,Kumar S.Biaxial nematic phase in bent-core thermotropic Mesogens [J]. Phys. Rev. Lett., 2004, 92(14):145506(1-4).[12] Madsen L J,Dingemans T J,Nakata M, et al.Thermotropic biaxial nematic lquid crystals [J]. Phys.Rev.Lett.,2004,92(14):145505(1-4).[13] 刘红.双轴向列相液晶的表面能[J]. 物理学报, 2002,51(12):2786-2792.[14] Giovanni D M.Tricritical points in biaxial liquid crystal phases [J]. Phys. Rev. E, 2005,71(6):061703(1-8).

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