Exploiting 3,5-Difluoro Aromatic Systems to Functionalize Poly(arylene ether)s

在这个由化学系大分子、超分子和纳米化学项目资助的项目中，赖特州立大学的Eric Fossum将利用间位活化的亲核芳香取代作为一种简便的路线来制备具有位于侧基位置的大量官能团的聚（亚芳基醚）。将采用三种不同的方法，包括：1）通过相应的碘代衍生物引入叠氮化物部分，允许“可点击”体系，2）利用官能磺酰胺基团作为亲核芳族取代反应的活化基团，和3）BB ′ B ″型单体的竞聚率控制的缩聚反应，其提供了在聚合过程之前或之后官能化的可能性。 聚合物的热性能和机械性能将被评估，以及它们作为工程热塑性塑料的应用潜力。更广泛的影响包括对硕士、本科和高中生进行研究方法的培训，在出版物和研讨会上传播成果，以及开发适用于各种应用的新型化学稳定聚合物材料。聚合物是长链有机分子，在日常生活的许多方面使用塑料，包括食品包装，用于汽车和航空航天运输的结构材料以及轻质电子器件。 这项工作将提高我们合成具有优异环境稳定性和性能的新型工程塑料的能力，这些塑料可以很容易地定制以满足特定需求。这些研究的结果可能会对目前使用工程塑料的应用产生许多积极的长期影响，包括能源，医疗，汽车，电子和航空航天工业。

In this project funded by the Macromolecular, Supramolecular and Nanochemistry Program of the Chemistry Division, Eric Fossum of Wright State University will utilize meta-activated nucleophilic aromatic substitution as a facile route to prepare poly(arylene ether)s with a multitude of functional groups located in pendent positions. Three different approaches will be employed including: 1) the introduction of azide moieties, via the corresponding iodo derivative, allowing for "clickable" systems, 2) utilization of functional sulfonamide groups as the activating group for nucleophilic aromatic substitution reactions, and 3) reactivity ratio controlled polycondensation reactions of BB'B"-type monomers, which provide the possibility of functionalization either before or after the polymerization process. The thermal and mechanical properties of the polymers will be evaluated as well as their potential for application as engineering thermoplastics. The broader impacts involve training master's, undergraduate, and high school students in research methods, disseminating results in publications and seminars, as well as the development of a new class of chemically robust polymeric materials suitable for a wide variety of applications.Polymers are long chain organic molecules and are found in many facets of everyday life that utilize plastics, including food packaging, structural materials for automotive and aerospace transportation, and lightweight electronic devices. This work will enhance our ability to synthesize new engineering plastics with excellent environmental stability and properties that can be readily tailored to meet a specific need. The results of these studies may have many positive, long-term impacts on applications in which engineering plastics are currently employed, including the energy, medical, automotive, electronics, and aerospace industries.