Synthesis of Doubly-Threaded Interlocked Macromolecules

双线程互锁高分子的合成

• 批准号: 1700847
• 负责人: Stuart Rowan
• 金额: $ 17.99万
• 依托单位: University of Chicago
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-07-01 至 2018-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1700847&HistoricalAwards=false
• 关键词: Synthesis; Doubly; Threaded; Interlocked; Macromolecules

Prof. Stuart Rowan of the University of Chicago develops synthetic methods that allow access to new polymer architectures and studies how these architectures impact polymer properties. This research has potential societal benefit with regards to design and preparation of novel polymeric materials with desirable unique properties. The project involves graduate and undergraduate students, high school students from a local girl's high school, and students of under-represented groups from the inner city Cleveland Municipal School District (through the Envoys program). The integrated approach of this research provides students at all levels with an exciting learning environment and broad research experiences. In addition, Prof. Rowan and his research group design new demonstrations for the outreach program entitled "Natures Materials", which is part of the Cleveland Museum's "Winter Discovery Day" on Dr. Martin Luther King Jr. Day. This program aims (i) to expose the local community to polymers and how Nature's materials can help us create a sustainable planet, and (ii) to train current graduate students on how to communicate and educate the general public and younger students about science and technology.This research project, which is supported by the Macromolecular, Supramolecular and Nanochemistry Program of the Chemistry Division, encompasses synthetic and metal-coordination chemistry, computational modeling, as well as polymer science and characterization. It focuses on the design, synthesis and characterization of polymers with doubly-threaded architectures where two chains are threaded through one macrocycle. The new synthetic methodology utilizes metal-ligand coordination as the thermodynamic driving force for the polymerization step and either dynamic covalent chemistry (in the form of ring closing metathesis) as the covalent fixing step to access the poly[n]catenanes or high yielding thiol-ene chemistry to access the doubly threaded poly[3]rotaxanes and slide ring gels. The polymers will have the ability to expand/contract without significantly altering bond or torsion angles and as such it is predicted they will exhibit unusual viscoelastic properties.

芝加哥大学的Stuart Rowan教授开发了合成方法，可以获得新的聚合物结构，并研究这些结构如何影响聚合物性能。该研究对于设计和制备具有所需独特性能的新型聚合物材料具有潜在的社会效益。该项目涉及研究生和本科生，当地女子高中的高中生，以及来自市中心克利夫兰市学区的代表性不足群体的学生（通过特使方案）。这项研究的综合方法为各级学生提供了一个令人兴奋的学习环境和广泛的研究经验。此外，罗文教授和他的研究小组为名为“自然材料”的外展计划设计了新的演示，这是克利夫兰博物馆关于马丁·路德·金博士的“冬季发现日”的一部分。天 该项目旨在（i）让当地社区接触聚合物，以及大自然的材料如何帮助我们创造一个可持续的地球，（ii）培训当前的研究生如何沟通和教育公众和年轻学生关于科学和技术。该研究项目由化学系的大分子，超分子和纳米化学项目支持，涵盖合成和金属配位化学、计算建模以及聚合物科学和表征。 它侧重于设计，合成和表征的聚合物与双线程架构，其中两个链是线程通过一个大环。 新的合成方法利用金属-配体配位作为聚合步骤的热力学驱动力，并且利用动态共价化学（以闭环复分解的形式）作为共价固定步骤以获得聚[n]索烃，或者利用高产率的硫醇-烯化学获得双螺纹聚[3]轮烷和滑环凝胶。 聚合物将具有膨胀/收缩而不显著改变键或扭转角的能力，因此预测它们将表现出不寻常的粘弹性能。