Studies of de Vries SmA* type phase in chiral thiobenzoates

IF 1.3 4区材料科学 Q3 CRYSTALLOGRAPHY

Phase Transitions Pub Date : 2022-12-27 DOI:10.1080/01411594.2022.2159403

J. Chruściel, A. Rudzki, M. Ossowska-Chruściel, S. Zalewski

引用次数: 0

Abstract

ABSTRACT The nature of the SmA*–SmC* phase transition was studied in three chiral liquid crystal compounds, in two belonging to the same homologous series, (S)-1-methylheptyl-4-(4′-alkoxybiphenylthiocarboxy)-benzoates, (S)-MHPSBOn, where n = 7 and 8 is the number of carbon atoms in the alkyl chain and (S)-4-[(4-{1-methylheptylcarboxyl} phenyl) carbonylthio] phenyl-4′-decyloxy-1-benzenecarboxylate (10OPOSMH). Compounds (S)-MHPSBO7 and (S)-MHPSBO8 show different behavior in the SmA*–SmC* phase transition, in MHPSBO7 the SmA* phase is the de Vries phase, while in MHPSBO8 it is the classic SmA* phase. The aim of the study is to demonstrate the presence of the de Vries type SmA * phase in three chiral thiobenzoates. The electro-optical method and SAXS were used to analyze the SmA*–SmC* transition.

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手性硫代苯甲酸盐中de Vries-SmA*型相的研究

摘要研究了三种手性液晶化合物中SmA*–SmC*相变的性质，其中两种化合物属于同一同源系列，即（S）-1-甲基庚基-4-（4′-烷氧基二苯基硫代羧基）-苯甲酸酯，（S）-MHPSBOn，其中n = 7和8是烷基链中的碳原子数，并且（S）-4-[（4-{1-甲基庚基羧基}苯基）羰基硫基]苯基-4′-癸氧基-1-苯羧酸酯（10OPOSMH）。化合物（S）-MHPSBO7和（S）MHPSBO8在SmA*–SmC*相变中表现出不同的行为，在MHPSBO7中，SmA*相是de Vries相，而在MHPSBO8中，它是经典的SmA*相和。本研究的目的是证明三种手性硫代苯甲酸盐中存在de Vries型SmA*相。采用电光方法和SAXS分析了SmA*–SmC*跃迁。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Phase Transitions 物理-晶体学

CiteScore

3.00

自引率

6.20%

发文量

审稿时长

1.4 months

期刊介绍： Phase Transitions is the only journal devoted exclusively to this important subject. It provides a focus for papers on most aspects of phase transitions in condensed matter. Although emphasis is placed primarily on experimental work, theoretical papers are welcome if they have some bearing on experimental results. The areas of interest include: -structural phase transitions (ferroelectric, ferroelastic, multiferroic, order-disorder, Jahn-Teller, etc.) under a range of external parameters (temperature, pressure, strain, electric/magnetic fields, etc.) -geophysical phase transitions -metal-insulator phase transitions -superconducting and superfluid transitions -magnetic phase transitions -critical phenomena and physical properties at phase transitions -liquid crystals -technological applications of phase transitions -quantum phase transitions Phase Transitions publishes both research papers and invited articles devoted to special topics. Major review papers are particularly welcome. A further emphasis of the journal is the publication of a selected number of small workshops, which are at the forefront of their field.