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.

芝加哥大学的斯图尔特·罗恩（Stuart Rowan）教授开发了合成方法，允许访问新的聚合物体系结构，并研究这些体系结构如何影响聚合物特性。这项研究在设计和制备具有理想独特特性的新型聚合物材料方面具有潜在的社会利益。该项目涉及毕业生和本科生，来自当地女孩高中的高中生以及来自内城克利夫兰市政学区（通过特使计划）的代表性不足小组的学生。这项研究的综合方法为学生提供了令人兴奋的学习环境和广泛的研究经验。此外，Rowan教授及其研究小组设计了针对外展计划的新示威活动，名为“ Natures Materials”，这是克利夫兰博物馆在Martin Luther King Jr. Day上的“冬季探索日”的一部分。 该计划的目的是（i）使当地社区接触聚合物以及大自然的材料如何帮助我们创建一个可持续的星球，以及（ii）培训当前的研究生如何沟通和教育公众和年轻学生就科学和技术进行科学和年轻学生。这项研究项目，这是由巨型分子，超分子和纳米化学构成的化学计算，化学和纳米化学构成的研究，建模以及聚合物科学和表征。 它着重于具有双线架构的聚合物的设计，合成和表征，其中两个链条通过一个大环螺纹穿过。 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. 聚合物将具有扩展/收缩的能力而不会显着改变键或扭转角，因此可以预测它们将表现出异常的粘弹性特性。