Phosphazenes

阿克伦大学的Claire A. Tessier得到了无机、生物无机和有机金属化学项目的支持，从事磷腈和聚磷腈的研究。聚（磷腈）是无机聚合物中最大的一类，磷和氮原子沿主链交替存在。聚合物的性质可以通过改变磷取代基来调整。本研究项目的主要目标是：(1)开发一种方便的lewis酸催化合成线性二氯磷腈；(2)了解三个或四个P-N单元的小磷腈环的化学性质；(3)了解线性和交联聚磷腈的性质。多核核磁共振是该项目的关键工具。聚（磷腈）在弹性体材料、绝缘泡沫、离子导体的固体溶剂、生物惰性薄膜、防火材料和控释药物聚合物中有着广泛的应用。其他有前途的聚磷腈的全面商业化一直受到不方便和通常不可复制的合成的阻碍。该项目将尝试开发在更温和的条件下工作的合成方法，并提供更多所需的线性聚合物。在这个多学科项目中接受培训的学生，包括妇女和代表性不足群体的成员，将学习关键的合成、光谱和聚合物表征技术。

Claire A. Tessier, University of Akron, is supported by the Inorganic, Bioinorganic and Organometallic Chemistry Program for studies on phosphazenes and poly(phosphazenes). Poly(phosphazenes) are the largest group of inorganic polymers, with phosphorus and nitrogen atoms alternating along the backbone. The properties of the polymer can be tuned by varying the phosphorus substituents. The main goals of this research project are (1) to develop a convenient, Lewis-acid catalyzed synthesis of linear dichlorophosphazenes; (2) to understand the chemistry of small phosphazene rings with three or four P-N units; (3) to understand the properties of both linear and crosslinked polyphosphazenes. Multinuclear NMR is a key tool for this project.Poly(phosphazenes) have a wide range of applications in elastomeric materials, insulating foams, solid solvents for ion conductors, bioinert films, fireproofing materials and controlled-release drug polymers. Full commercialization of other promising poly(phosphazenes) has been hampered by inconvenient and often irreproducible syntheses. This project will attempt to develop syntheses that will work under milder conditions and give more of the desired linear polymers. Students trained on this multidisciplinary project, including women and members of underrepresented groups, will learn key synthetic, spectroscopic and polymer characterization techniques.