A mechanical model of liquid crystals ( LCs ) was used to explain the phase formation and thermal properties. The LC phases in the model are micro-machine systems consisting of an ensemble of molecular rotors, and some dynamic parameters in a semi-experiment molecular orbit method. A novel explanation on the multi-phase formation of LC system is obtained. It is found that the value of the critical rotational velocity is a key parameter for the characterization of each homologous series. The dipole moment of the molecules was also discussed.
参考文献
| [1] | K Toriyama;D A Dunmur .A Molecular Model for the Smetic B Phase -the Stabilized Molecular Rotor[J].Liq Cryst,1993,13:797-810. |
| [2] | K Toriyama;H Kimura;H Onnagawa .Mechanical String Model for Liquid Crystal Ensemble:A Comprehensive Model for Polymorphism[J].Jpn J Appl Phys,2001,40:5000-5007. |
| [3] | Xu J.;Onnagawa H.;Sugimori S.;Toriyama K.;Okada H. .Liquid crystal system as molecular machinery: Investigation of dynamic impedance matching between molecular core and terminal groups using rotor-bearing model[J].Japanese journal of applied physics,2000(4A):1801-1807. |
| [4] | H Ma;J Xu;H Okada;S Sugimori, H Onnagawa K Toriyama .Mechanical Rotor Model for Fluorinated Terphenyl Liquid Crystals[J].Jpn J Appl Phys,2004,4A,43:148-171. |
| [5] | Heng MA;Hiroyuki OKADA;Shigeru SUGIMORI;Hiroyoshi ONNAGAWA;Kazuhisa TORIYAMA .A Mechanical Model Study on Correlations of Liquid Crystal Phase and Dynamic Parameters in Linear Molecules[J].Japanese journal of applied physics,2004(5a):2626-2627. |
| [6] | R Gasch;H Pfuytzner.Rotordynomik, Eine Einfuhrung[M].Berlin Springer-Verlag |
| [7] | D Demus;J Goodby;G W Gray.H-W Spiess and V Vill[A].Wiley-VCH,Weinheim,1998 |
| [8] | S. Mitra;R. Mukhopadhyay;K. Venu .Molecular motions in liquid crystal BBBA (4O.4): QENS study[J].Chemical Physics: A Journal Devoted to Experimental and Theoretical Research Involving Problems of Both a Chemical and Physical Nature,2000(1/2):149-156. |
| [9] | An Jiming,MIN Xinmin,Nan Cewen,CAI Kefeng.STURCTURAL CHARACTERISTICS AND QUANTUM |
| [10] | Min X M;Xiao R J;Wang Han;Wang Wei-min .Electronic Structure and Chemical Band of Titanium Diboride[J].Jounrnal of Wuhan University of Technology-Materials Science Edition,2003,18(02):11-14. |
| [11] | B K Sadashiva;G S R S Rao .A Convenient Method for the Preparation of 4 - n-alkyl-4"-cyano-p-terphenyl[J].Mol Cryst Liq Cryst,1977,38:345-352. |
| [12] | A J Leadbetter;P A Tucker;G W Gray;A R Tajbakhsh .Unusual structures in some alkyl cyanoterphenyls[J].Liq Cryst,1990,8:1-12. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%