Twisting based on Chiral Transformation

基于手性变换的扭曲

• 批准号: 506699569
• 负责人: Professor Dr. Wolfgang Binder
• 金额: --
• 依托单位: Arbeitsbereich Technische Chemie und Makromolekulare 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/506699569?language=en
• 关键词: Twisting; based; Chiral; Transformation

Both, synthetic or biological polymers, can form well defined 3D-structures, either in the solid state or in solution. One of the most prevalent secondary structures in both, synthetic polymers and proteins is the helix with similar helical structures found in a variety of different polymers. In contrast to α-helical structures of proteins, most of these polymers lack intramolecular stabilization by e.g. hydrogen bonds, unless specifically introduced in the side chains, often only stabilized by electronic and steric factors depending on the different polymer backbones and their side chains. In this project we plan to study collective behaviour or chirality transfer in defined molecules assemblies and geometries, such as on interfaces, in block-copolymer micelles, and in defined cyclic polymeric architectures. The idea is to control a specific assembly (2D, 3D) and study changes in helicity via chiral switches, embedded at the head of the helices. In particular, we will generate cyclic, helical polymers, where an additional (photo)-switch is embedded into at least one junction site, linking two of the helical polymers. The central idea is to switch chirality so as to influence the third-chain, generating a frustrated system, where the differently oriented helical chains are in competition for their preferred chirality. As a long term goal we plan to embed these molecules into spintronic devices, where chirality is inducing spin-polarization, resulting in a logic chiral device.

无论是合成聚合物还是生物聚合物，都可以在固态或溶液中形成明确的3D结构。合成聚合物和蛋白质中最普遍的二级结构之一是在各种不同聚合物中发现的具有相似螺旋结构的螺旋。与蛋白质的α-螺旋结构相反，这些聚合物中的大多数缺乏分子内稳定性，例如氢键，除非特别引入侧链中，通常仅通过电子和空间因素稳定，这取决于不同的聚合物主链及其侧链。在这个项目中，我们计划研究集体行为或手性转移在定义的分子组装和几何形状，如界面上，在嵌段共聚物胶束，并在定义的环状聚合物结构。这个想法是控制一个特定的组件（2D，3D），并通过嵌入在螺旋头部的手性开关研究螺旋度的变化。特别是，我们将产生环状螺旋聚合物，其中额外的（光）开关嵌入到至少一个连接位点，连接两个螺旋聚合物。其中心思想是切换手性以影响第三链，产生一个受抑系统，其中不同取向的螺旋链竞争其优选的手性。作为一个长期的目标，我们计划将这些分子嵌入到自旋电子器件中，其中手性诱导自旋极化，从而产生逻辑手性器件。