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

在这个由化学部大分子、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将利用元活化亲核芳香取代作为一种简便的途径来制备具有大量悬置官能团的聚芳醚。将采用三种不同的方法，包括：1)通过相应的碘衍生物引入叠氮化物基团，允许“可点击”的体系；2)利用功能化磺酰胺基团作为亲核芳香取代反应的激活基团；3)BB'B"型单体的反应活性比控制缩聚反应，这提供了在聚合过程之前或之后功能化的可能性。将评估聚合物的热性能和机械性能，以及它们作为工程热塑性塑料的应用潜力。更广泛的影响包括培训硕士，本科生和高中生的研究方法，在出版物和研讨会上传播结果，以及开发一类新的化学坚固的聚合物材料，适用于各种各样的应用。聚合物是长链有机分子，在日常生活的许多方面都使用塑料，包括食品包装，汽车和航空航天运输的结构材料，以及轻质电子设备。这项工作将增强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根据特定需求进行定制。这些研究的结果可能会对目前工程塑料的应用产生许多积极的、长期的影响，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.