Open AccessTHE PITCH AND CHIRAL CENTER DISTRIBUTION IN SmC* LIQUID CRYSTALS
Author(s) -
Qian Xiang-zhong
Publication year - 1998
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.47.664
Subject(s) - liquid crystal , helicity , materials science , center (category theory) , liquid crystalline , distribution (mathematics) , inversion (geology) , molecule , molecular physics , thermodynamics , physics , condensed matter physics , crystallography , particle physics , quantum mechanics , mathematical analysis , paleontology , chemistry , mathematics , structural basin , biology
An expression concerning the variation of the pitch of SmC* liquid crystals is obtained by using the cell model in statistical mechanics with the introduction of the distribution factor ζχ of the chiral centers in the interaction potential between biaxial molecules containing multiple chiral centers.It shows the condition for inversion of helicity of the liquid crystals.With proper choice of the values of parameters involved we have calculated the variation of the pitch with temperature for liquid crystals TDOBAMCC,FLC,PACMB and H6/10.The calculated results agree well with the experimental data.