Strachan Grant J, Górecka Ewa, Hobbs Jordan, Pociecha Damian
Faculty of Chemistry, University of Warsaw, ul. Pasteura 1, 02-093 Warsaw, Poland.
School of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, U.K.
J Am Chem Soc. 2025 Feb 19;147(7):6058-6066. doi: 10.1021/jacs.4c16802. Epub 2025 Feb 7.
A series of liquid crystal (LC) materials are reported, which form a variety of ferroelectric nematic and smectic phases. The relationship between the number and position of lateral fluorine substituents and the formation of ferroelectric LC phases is investigated. While the addition of fluorine substituents increases the temperature at which ferroelectric order appears, the relationship between fluorination and the LC phase sequence is more complicated. Introducing lateral fluorine substituents can either suppress or promote the formation of ferroelectric smectic phases, depending on their position within the molecule, and the interplay between these trends allows for more exotic ferroelectric phases to appear.
报道了一系列液晶（LC）材料，它们形成了多种铁电向列相和近晶相。研究了侧向氟取代基的数量和位置与铁电液晶相形成之间的关系。虽然氟取代基的加入提高了铁电有序出现的温度，但氟化与液晶相序列之间的关系更为复杂。引入侧向氟取代基可以抑制或促进铁电近晶相的形成，这取决于它们在分子中的位置，并且这些趋势之间的相互作用使得更多奇特的铁电相得以出现。
