Organoborane Polymers in Catalysis and Supramolecular Materials Chemistry

有机硼烷聚合物在催化和超分子材料化学中的应用

基本信息

批准号：
1904791
负责人：
Frieder Jaekle
金额：
$ 59.37万
依托单位：
Rutgers University Newark
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2019
资助国家：
美国
起止时间：
2019-09-01 至 2024-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1904791&HistoricalAwards=false
关键词：
Organoborane Polymers Catalysis Supramolecular Materials

项目摘要

With this award, the Macromolecular, Supramolecular and Nanochemistry Program in the Division of Chemistry is funding Professor Frieder Jaekle of the Department of Chemistry at Rutgers University-Newark to explore catalytic properties of a new class of polymers that contain the chemical element boron. Artificial polymers are plastic materials consisting of many repeating molecules that are joined together by carbon-carbon bonds. Polymers benefit our society in many different ways (e.g., light-weight, easy to manufacture, and durable) and so they have become a part of everyday life. An important goal in the field of polymer science is to generate plastic materials that can be readily recycled - and this includes reshaping the materials during heat or pressure treatments. This work addresses a unique class of polymers associated with boron starting materials, instead of the usual carbon-based polymers. Boron polymers provide excellent building blocks for construction of 'smart' materials that change their original properties when exposed to external stimuli such as light, heat, pressure or chemical compounds. They may provide plastics that are more recyclable than current carbon-based materials. The project contributes to the training of a diverse group of students in a highly interdisciplinary research environment. Dr. Jaekle and his group participate in high school outreach activities and efforts at maintaining and expanding access to a polymer and nanomaterials characterization facility at Rutgers-Newark (PolyRUN).The research team is preparing new organoborane polymers, studying their properties, and pursuing diverse applications. In the first goal, polymeric Lewis acids and 'frustrated' Lewis pairs (FLPs) are developed as supported catalysts. Tailor-made and sterically hindered, yet highly electron-deficient, triarylboranes are modified with polymerizable groups and subjected to copolymerization with monomers that feature Lewis base groups and/or substituents that facilitate polymer recovery. The copolymers are investigated in metal-free catalysis reactions such as hydrogenation and hydrosilylation of imines, aldehydes and ketones. The second goal of this work focuses on the preparation of polymers with less sterically hindered organoboranes as building blocks for supramolecular materials. When combined with Lewis base-functionalized polymers, these blocks reversibly form classical Lewis pairs as crosslinks of transient polymer networks. The last goal concentrates on the mechanochromic and stimuli-responsive properties of organoborane polymers and the synthesis of B-N analogs of polystyrene (azaborine polymers). The chemistry in this work is highly transformative with a strong potential to lead to novel materials with new functions and a breadth of applications.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

通过该奖项，化学系的大分子，超分子和纳米化学计划是资助罗格斯大学 - 纽瓦克化学系教授弗里德·贾克勒（Frieder Jaekle），以探索新的聚合物的催化性能，这些聚合物含有化学元素硼。人造聚合物是由许多重复分子组成的塑料材料，这些分子与碳碳键一起连接在一起。聚合物以许多不同的方式（例如，轻巧，易于制造和耐用）使我们的社会受益，因此它们已成为日常生活的一部分。聚合物科学领域的一个重要目标是生成可以很容易回收的塑料材料 - 这包括在热或压力处理过程中重塑材料。这项工作介绍了与硼原材料相关的一类独特的聚合物，而不是通常的基于碳的聚合物。硼隆聚合物为建造“智能”材料的构建提供了出色的基础，这些材料在暴露于外部刺激（例如光，热，压力或化合物）时会改变其原始特性。它们可以提供比当前碳基材料更可回收的塑料。该项目为在高度跨学科的研究环境中培训一群学生。 Jaekle博士及其小组参加了高中外展活动以及在Rutgers-Newark（Polyry）（Polyry）维护和扩大获得聚合物和纳米材料表征的访问和努力的努力。研究团队正在准备新的有机物质聚合物，研究他们的财产，并追求多样化的多样性申请。在第一个目标中，聚合物路易斯酸和“沮丧”的刘易斯对（FLP）是作为支持的催化剂而开发的。量身定制的，且缺乏电子高度的三级硼烷通过聚合基团进行了修饰，并与具有刘易斯基碱基基组和/或取代基的单体进行了共聚，并与聚合物恢复的单体进行了共聚。在无金属催化反应中研究了共聚物，例如亚胺，醛和酮的氢化和氢化硅烷化。这项工作的第二个目标集中于制备与超分子材料的基础，以较少的空间阻碍的有机菜素的组合。当与刘易斯底官能化聚合物结合使用时，这些块可逆地形成经典的路易斯将作为瞬态聚合物网络的交联。最后一个目标集中在有机烷聚合物的机械颜色和刺激响应特性上，以及聚苯乙烯（阿扎巴林聚合物）B-N类似物的合成。这项工作的化学反应具有很高的变革性，具有强大的潜力，可以通过新功能和广度应用进行新的材料。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子和更广泛影响的评估来评估值得支持的。标准。