ORIENTATIONAL ORDERING OF A NEMATOGEN FROM X-RAY-DIFFRACTION STUDIES

被引：1

作者：

SEAL, A

MITRA, M

PAUL, S

PAUL, R

机构：

[1] INDIAN ASSOC CULTIVAT SCI,DEPT SOLID STATE PHYS,CALCUTTA 700032,W BENGAL,INDIA

[2] BANGABASI MORNING COLL,DEPT PHYS,CALCUTTA 700009,INDIA

[3] UNIV N BENGAL,DEPT PHYS,PIN 734430,W BENGAL,INDIA

来源：

MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 1993年 / 225卷

关键词：

NEMATOGENS; X-RAY DIFFRACTION; ORDER PARAMETER; MOLECULAR ASSOCIATION;

D O I：

10.1080/10587259308036239

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In this paper we have reported the results Of X-Tay diffraction studies on the nematic phase of 4-ethoxyphenyl trans-4'-propyl cyclohexane carboxylate at different temperatures. We have analyzed the experimental data to determine the orientational distribution function and hence to calculate the orientational order parameters [P2] and [P4]. The experimental order parameter values disagree with the Maier-Saupe mean field theory, but are in excellent agreement with the continuum theory of T. E. Faber. The possible causes for deviation from mean field model have been discussed. The molecules also form association with apparent molecular length of about 1.5 times their actual length.

引用

页码：355 / 360

页数：6

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