Shift of the nematic–isotropic phase transition temperature in a thin layer of a metallomesogenic complex

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• 作者：S. G. Polushin ; V. B. Rogozhin ; G. E. Polushina ; I. E. Lezova…
• 刊名：Doklady Physical Chemistry
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：471
• 期：2
• 页码：199-202
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Physical Chemistry;
• 出版者：Pleiades Publishing
• ISSN：1608-3121
• 卷排序：471

文摘

The effect of boundaries on the nematic–isotropic phase transition temperature in a melt of a metallomesogenic complex was studied for the first time. This was done by comparison of the electro-optical constant of the isotropic phase with the dielectric and optical anisotropy of the nematic phase on the basis of the Landau–de Gennes theory. In a real experiment, the two liquid phases (nematic and isotropic ones) coexist in a range of several degrees around the transition. According to polarization microscopy data, the phase transition temperature decreases by more than 10°C as the metallomesogen layer thickness is reduced from 200 to 5 μm.