Supramolecular Ionic Networks: Synthesis, Rheology, and Modeling

超分子化学目前的两个目标是开发新的超分子组装体的合成策略和创建具有独特和可控性质的组装体。 PI及其团队正在利用多阳离子和多阴离子分子通过静电相互作用制备超分子网络材料。PI提出了详细的机制研究，以表征和理解工作中的潜在超分子化学原理。 具体来说，他和他的小组将合成新的双阳离子膦，通过将双阳离子膦与各种小分子和大分子阴离子混合来制备超分子离子网络，表征这些离子网络的流变特性，随后在国家科学基金会化学部大分子，超分子和纳米化学计划的财政支持下模拟流变特性。 这些研究解决了这样的假设，即这种超分子材料的方法将导致独特的组成和性能。 这项研究的结果将有一个显着的影响，通过提供一个详细的机械理解这种类型的超分子组装沿着与强大的数据收集的分析，讨论，并进一步假设generation.Non-Technical总结：新材料的创建是科学进步的基础，因为这项研究导致新的想法，独特的性能，和新的应用。 在美国国家科学基金会化学部大分子，超分子和纳米化学计划的财政支持下，该研究项目将研究一种新的方法来研究“盐”材料，而不是像食盐，NaCl这样的晶体材料。 相反，这些材料表现得像聚合物或塑料。 在教育方面，这笔资金的两个教育影响是：1）本科生参与研究计划，使他们能够获得经验;和2）研究生参与波士顿城市研究员NSF GK 12外展计划，该计划提供共同的，在波士顿公立学校系统中，大多数学生是少数民族或经济上不发达的学生，弱势群体

TECHNICAL SUMMARY:Two of the current goals in supramolecular chemistry are the development of new synthetic strategies to supramolecular assemblies and the creation of assemblies with unique and controllable properties. The PI and his group are using multi-cationic and multi-anionic molecules to prepare supramolecular network materials via electrostatic interactions. The PI proposes a detailed mechanistic study to characterize and understand the underlying supramolecular chemistry principles at work. Specifically, he and his group will synthesize new dicationic phosphoniums, prepare supramolecular ionic networks by mixing the dicationic phosphoniums with various small molecule and macromolecular anions, characterize the rheological properties of these ionic networks, and subsequently model the rheological properties with the financial support from the Macromolecular, Supramolecular, and Nanochemistry Program in the Division of Chemistry at the National Science Foundation. These studies address the hypothesis that this approach to supramolecular materials will result in unique compositions and properties. The results of this research will have a significant impact by affording a detailed mechanistic understanding of this type of supramolecular assembly along with collection of robust data for analysis, discussion, and further hypothesis generation.NON-TECHNICAL SUMMARY:The creation of new materials is fundamental to the advancement of science as this research leads to new ideas, unique properties, and new applications. With the financial support from the Macromolecular, Supramolecular, and Nanochemistry Program in the Division of Chemistry at the National Science Foundation, this research project will investigate a new approach to materials that are "salts" but not crystalline materials like table salt, NaCl. Instead these materials behave like polymers or plastics. On the education front, the two educational impacts from this funding are: 1) the participation of undergraduates in the research program so they can gain experience; and 2) the participation of graduate students in the Boston Urban Fellow NSF GK12 outreach program which provides co-instructors for high school science courses in those Boston Public School systems where a majority of the students are underrepresented minorities or economically disadvantaged.