Structure and dynamics of ionic liquid crystals

离子液晶的结构和动力学

• 批准号: 257901426
• 负责人: Professor Dr. Frank Gießelmann
• 金额: --
• 依托单位: Lehrstuhl für Supramolekulare Chemie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/257901426?language=en
• 关键词: Structure; dynamics; ionic; liquid; crystals

Ionic Liquid Crystals (ILCs) combine the extraordinary properties of ionic liquids with the anisotropy of conventional thermotropic liquid crystals. Being long-range ordered liquid electrolytes, they represent an extremely promising new class of materials. Like already in the first project phase, the general goal of our project is to provide a sound basis for the molecular understanding of ionic LCs, their structures and dynamics, and to identify and evaluate application-relevant aspects of ionic LCs on this basis. In terms of the molecular understanding of ionic LCs, the first project phase provided interesting new aspects that will be pursued in the second funding period. Specifically, these are (i) the existence of surprisingly strong pre-transition effects in the isotropic phase of ionic LCs, (ii) the relevance of ion-specific effects, which may be systematized by the Hofmeister series, and (iii) the relationship between ILCs and lyotropic liquid crystals. Using new series of ILCs to be synthesized, in which monovalent anions and cations of the respective Hofmeister series are systematically varied, the investigations of the second funding phase should clarify to what extent the properties and phase behaviour of ionic LCs can be systematized and understood by more general concepts from the fields of lyotropic liquid crystals (packing parameters), interionic interactions (Hofmeister series) or pre-transition phenomena. In addition to the molecular understanding of ionic LCs, application-relevant aspects of ionic LCs will receive increased attention in the second funding phase. The investigations planned for this purpose are primarily aimed at electrochemical applications of ILCs, in particular the transport properties of H+ and Li+ ions in thermotropic and possibly lyotropic ILC phases as well as the anisotropy of ionic charge transport in ILCs. The results of these investigations should allow a first evaluation of potential applications of ILCs as thermally and electrochemically stable electrolytes in batteries and (medium temperature) fuel cells.

离子液体晶体（ILC）将离子液体的特性与常规热液晶的各向异性结合在一起。作为远程有序的液体电解质，它们代表了一种非常有希望的新材料。就像已经在第一个项目阶段一样，我们项目的一般目标是为离子LC，其结构和动力学的分子理解提供合理的基础，并在此基础上识别和评估离子LC的相关方面。就离子LCS的分子理解而言，第一个项目阶段提供了有趣的新方面，这些方面将在第二个融资期间进行。具体而言，这些是（i）在离子LCS的各向同性相中存在出人意料的强大前过渡效应，（ii）离子特异性效应的相关性，这可能是由Hofmeister系列进行系统化的，以及（iii）ILCS与乳液液晶之间的关系。使用要合成的新系列ILC，其中各个Hofmeister系列的单价阴离和阳离子在系统上变化，第二融资阶段的研究应阐明离子LC的性能和相位行为在多大程度上可以通过更一般的相互作用的概念来对何种程度化，并在多大程度上被置换术语（包装）或包装量的commenters（包装）（包装）（包装）（包装）的概念来理解。前过渡现象。除了对离子LCS的分子理解外，离子LC的应用相关方面将在第二个融资阶段受到越来越多的关注。为此目的计划的研究主要针对ILC的电化学应用，尤其是H+和Li+离子在热型和可能的溶元ILC相中的运输特性以及ILC中离子电荷转运的各向异性。这些研究的结果应允许对电池和（中温）燃料电池中的热和电化学稳定电解质的潜在应用进行首次评估。