CAREER: Preparation of Materials Composed of Mechanically Interlocked Nanoscale Species

职业：由机械联锁纳米级物质组成的材料的制备

• 批准号: 0847736
• 负责人: Michael Mayer
• 金额: $ 54.68万
• 依托单位: Texas Tech University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-08-01 至 2014-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0847736&HistoricalAwards=false
• 关键词: CAREER; Preparation; Materials; Composed; Mechanically

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).The Organic and Macromolecular Chemistry Program in the Chemistry Division at the National Science Foundation supports Professor Michael F. Mayer at Texas Tech University whose proposed research project is to establish new, controlled synthetic methods to access new compounds composed of interlocked molecular species and new polymeric materials with mobile slip-links (sliding crosslinks) and apply them to the study and advancement of the theory of rubber elasticity. Materials composed of mechanically interlocked molecular-level species often possess novel and substantially different bulk physical properties than materials composed of identical but otherwise non-interlocked molecular-level species. Unfortunately, the current ability to controllably synthesize interlocked molecules is quite limited and synthetic control over the type of entanglement and degree of interlocking is virtually non-existent in macromolecular and polymeric species. This research will result in new processes for accessing classes of polymers known as polypseudorotaxanes, cyclic and acyclic polyrotaxanes, daisy-chain polymers as well as innovative polymeric materials with mobile slip-link crosslinks ? a novel type of polymer crosslink that has not been available in rubbery bulk materials but has been of great interest for several decades. The new ability to produce polymeric materials with mobile slip-links (sliding crosslinks) will result in new materials which may be ideal candidates for experimental probing to aid development of theoretical models of polymer entanglements. This transformative methodology may, therefore, help advance the understanding of rubber-like elasticity in polymeric materials, a long-standing pursuit of polymer science. Furthermore, by virtue of the unique molecular structure of the proposed materials, the materials are expected to possess novel viscoelastic properties which may make them suitable for a variety of niche applications. The proposed educational activities center on digitally recording and uploading chemistry content to the internet. This will positively impact both the producers and the consumers of the content. The producers, for example chemistry majors, student affiliates of the ACS, undergraduate researchers and Welch Summer Scholars (high school students), will benefit from participating in a truly modern form of pedagogy. The farthest-reaching benefit will be for the consumers, identified as chemistry students, broadly defined, from local, national and international locations, who may freely participate in informal, cyber-enabled, inquiry-based chemistry education in both English and Spanish.

该奖项由2009年美国复苏和再投资法案(公共法律111-5)资助。国家科学基金会化学部的有机和高分子化学项目支持德克萨斯理工大学的Michael F.Mayer教授，他提出的研究项目是建立新的受控合成方法，以获得由互锁分子物种和具有可移动滑动连接(滑动交联键)的新聚合物材料组成的新化合物，并将其应用于橡胶弹性理论的研究和发展。由机械互锁的分子级物种组成的材料通常具有与相同但未互锁的分子级物种组成的材料相比具有新颖且本质上不同的整体物理性质。遗憾的是，目前可控合成互锁分子的能力相当有限，而且在大分子和聚合物物种中几乎不存在对纠缠类型和互锁程度的合成控制。这项研究将导致新的方法来获得被称为聚假轮烷、环状和非环状聚轮烷、菊花链聚合物以及具有可移动滑链交联剂的创新聚合物材料。一种新型的聚合物交联剂，在橡胶块状材料中尚未出现，但几十年来一直引起人们的极大兴趣。制造具有移动滑链(滑动交联键)的聚合物材料的新能力将产生新的材料，这些材料可能是实验探索的理想候选者，以帮助发展聚合物纠缠的理论模型。因此，这种变革性的方法可能有助于促进对聚合物材料中橡胶状弹性的理解，这是聚合物科学的长期追求。此外，由于所建议材料的独特分子结构，这些材料有望具有新颖的粘弹性性质，使其适合于各种利基应用。拟议的教育活动以数字化记录化学内容并将其上传到互联网为中心。这将对内容的生产者和消费者产生积极影响。制片人，例如化学专业的学生、美国学生协会的学生分支机构、本科生研究人员和韦尔奇暑期学者(高中生)，将从参与真正现代形式的教学中受益。最大的好处将是消费者，他们被广泛定义为化学学生，来自当地、国家和国际地点，他们可以自由地参加非正式的、基于网络的、以英语和西班牙语为基础的化学教育。