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Hydrogen-bond induced chiral-nematic mesophases - A modular approach for systematic investigation of supramolecular liquid crystals and application potential thereof

氢键诱导的手性向列中间相——系统研究超分子液晶及其应用潜力的模块化方法

基本信息

批准号：
349764126
负责人：
Professor Dr. Michael Giese, Ph.D.
金额：
--
依托单位：
Organische Chemie - AG Giese
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2017
资助国家：
德国
起止时间：
2016-12-31 至 2020-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/349764126?language=en
关键词：
Hydrogen bond induced chiral nematic

项目摘要

A number of proof-of-principle studies on CLCs derived by the common approach to dope nematic liquid crystalline hosts with chiral dopants were already described and show their potential for applications. However, the synthesis of enantiopure, photo-switchable dopants is challenging and the manipulation of the photonic properties of the CLCs is rather by chance than by rational design. Herein, we describe a modular approach to supramolecular liquid crystals by direct incorporation of chirality into functional assemblies via hydrogen bonding. This allows us to prevent incompatibility issues as well as phase separation and helps to minimize the synthetic efforts for novel functional materials. The modular design enables systematic studies on the structure property relationships to get a detailed understanding of hydrogen bonded CLCs and deduce rational design criteria towards functional photonic materials with tailor-made properties. The first part of the present project investigates the efficiency of the chirality transfer by employing different chiral HB-acceptors. Determination of the HTP-values allows for the quantification of the chirality transfer (Phase 1). In the second part the chiral HB-acceptors will be combined with photo-switchable azopyridines to manipulate the photonic properties of the CLCs by light (Phase 2). Finally first proof-of-principle studies will be performed to investigate the application potential of the CLCs towards photonic data storage and sensors (Phase 3).

通过用手性掺杂剂掺杂向列液晶宿主的常见方法，已经描述了许多关于CLCs的原理验证研究，并显示了它们的应用潜力。然而，对映纯、光可切换掺杂剂的合成是具有挑战性的，并且CLCs的光子特性的操纵是偶然的，而不是通过合理的设计。在这里，我们描述了一种模块化的方法，通过氢键将手性直接结合到功能组件中来制备超分子液晶。这使我们能够防止不相容性问题以及相分离，并有助于最大限度地减少新型功能材料的合成工作量。模块化设计可以系统地研究结构性质关系，以详细了解氢键CLCs，并推导出具有定制性质的功能光子材料的合理设计标准。本项目的第一部分通过使用不同的手性hb受体来研究手性转移的效率。htp值的测定允许手性转移的量化（阶段1）。在第二部分中，手性hb受体将与光开关偶氮吡啶结合，通过光操纵CLCs的光子特性（第二阶段）。最后，将进行首次原理验证研究，以调查CLCs在光子数据存储和传感器方面的应用潜力（第三阶段）。