Deuterium reinforced liquid crystals - synthesis and photochemical stability of deuterium labelled cyano-oligophenyls

IF 5.3 2区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Molecular Liquids Pub Date : 2025-07-04 DOI:10.1016/j.molliq.2025.128096

Marta Żak, Jakub Herman, Przemysław Kula

引用次数: 0

Abstract

The photostability of Liquid Crystals (LCs) is one of the most important issues from the point of view of the lifetime of liquid crystalline devices. Organic molecules in such devices are exposed to long-term electromagnetic radiation and high temperatures, which initiates photodegradation processes and contributes to the deterioration of device performance and functionality. In this work, we developed a synthesis of tetra-deuterated cyano-oligophenyls and presented a new LC material prepared from title components. The photodegradation process was carried out for two isotopological LC mixtures, and the refractive indices, phase transition temperatures and textures were compared. LC material reinforced with deuterium atoms in its components shows enhanced UV resistance compared to an analogous LC mixture but composed of non-deuterated molecules. The results suggest the high potential of Deuterated Liquid Crystals as components of the LC mixture, showing enhanced photostability.

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氘增强液晶。氘标记的氰基低聚苯基的合成和光化学稳定性

液晶的光稳定性是影响液晶器件寿命的重要因素之一。这些器件中的有机分子暴露在长期的电磁辐射和高温下，引发光降解过程，导致器件性能和功能的恶化。在这项工作中，我们开发了一种合成四氘化氰低聚苯基的方法，并提出了一种由标题成分制备的新型LC材料。对两种同位素LC混合物进行了光降解，并对其折射率、相变温度和织构进行了比较。与由非氘化分子组成的类似LC混合物相比，在其成分中加入氘原子的LC材料具有增强的抗紫外线能力。结果表明，氘化液晶作为LC混合物的组分具有很高的潜力，表现出增强的光稳定性。

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

Journal of Molecular Liquids 化学-物理：原子、分子和化学物理

CiteScore

10.30

自引率

16.70%

发文量

2597

审稿时长

78 days

期刊介绍： The journal includes papers in the following areas: – Simple organic liquids and mixtures – Ionic liquids – Surfactant solutions (including micelles and vesicles) and liquid interfaces – Colloidal solutions and nanoparticles – Thermotropic and lyotropic liquid crystals – Ferrofluids – Water, aqueous solutions and other hydrogen-bonded liquids – Lubricants, polymer solutions and melts – Molten metals and salts – Phase transitions and critical phenomena in liquids and confined fluids – Self assembly in complex liquids.– Biomolecules in solution The emphasis is on the molecular (or microscopic) understanding of particular liquids or liquid systems, especially concerning structure, dynamics and intermolecular forces. The experimental techniques used may include: – Conventional spectroscopy (mid-IR and far-IR, Raman, NMR, etc.) – Non-linear optics and time resolved spectroscopy (psec, fsec, asec, ISRS, etc.) – Light scattering (Rayleigh, Brillouin, PCS, etc.) – Dielectric relaxation – X-ray and neutron scattering and diffraction. Experimental studies, computer simulations (MD or MC) and analytical theory will be considered for publication; papers just reporting experimental results that do not contribute to the understanding of the fundamentals of molecular and ionic liquids will not be accepted. Only papers of a non-routine nature and advancing the field will be considered for publication.