CAREER: Cooperative Supramolecular Polymerization from Polypeptide-containing Macromolecules

技术概述：超分子化学在将能够进行配位、非共价相互作用的小分子组装成超分子结构方面取得了很大进展。然而，利用大的合成大分子作为超分子聚合的单体单位的成功是有限的。从蛋白质的超分子聚合物推断，大分子单体可以构建巨大的聚合物超结构，并有望具有卓越的材料性能和优越的稳定性。本CAREER研究的目标是开发经过受控超分子聚合的合成大分子，以形成具有可预测形态和物理性质的纳米材料。该方法首先研究带有接枝多肽的合成大分子，并利用接枝多肽二级结构之间可预测的相互作用来驱动组装。这项研究旨在：(1)从选定的多肽接枝的梳状大分子合成超分子聚合物并对其结构进行表征；(2)表征超分子聚合物的力学性能并阐明其性质的分子基础；(3)进行动力学和热力学研究，建立大分子单元超分子聚合的协同组装机制。(4)推导出设计用于协同组装和聚合的合成大分子单元所涉及的一般原则。拟议的研究可能最终导致聚合物体系的产生，将接近自然界中发现的复杂程度和复杂性。S自组织超分子聚合物。非技术概要：由生物大分子组装而成的纳米结构具有非凡的物理特性，长期以来一直激励着科学家们创造出具有类似精度和效率的合成系统。生物启发合成材料的实用设计已经出现在高分子科学，化学和生物学的界面，并可能在可持续塑料，生物医学材料和可再生能源中找到应用。该研究将为控制组装创造新的大分子构建块，为组装机制提供见解，并开发具有优越机械强度和自修复性能的纳米结构材料。在这样一个界面上，聚合物研究的增长为教育学生和激励他们从事科学和工程方面的职业提供了机会。CAREER奖将允许PI在康涅狄格大学开发生物启发聚合物材料的综合研究和教育计划。该项目将满足学生对这一新兴领域的跨学科教育和高质量研究经验的主要需求。拟议的外展计划旨在：(1)将拟议的研究与跨学科聚合物课程的发展相结合；(2)为本科生和高中生提供充满活力的聚合物研究体验；(3)通过为公众提供讲座来促进聚合物研究及其对社会的影响。重点将放在各级代表不足的学生身上。

TECHNICAL SUMMARY:Supramolecular chemistry has made great progress in assembling small molecules capable of coordinated, non-covalent interactions into supramolecular structures. However, success in the use of large synthetic macromolecules as the monomer units for supramolecular polymerization has been limited. As inferred from supramolecular polymers from proteins, giant polymeric superstructures can be constructed from macromolecular monomers, and they are expected to have remarkable material performance and superior stability. The objective of this CAREER research is to develop synthetic macromolecules that undergo controlled supramolecular polymerization to form nanomaterials with predictable morphology and physical properties. The approach begins with investigations of synthetic macromolecules bearing grafted polypeptides, and takes advantage of the predictable interactions among grafted polypeptide secondary structures to drive the assembly. The research seeks to: (1) synthesize supramolecular polymers from selected polypeptide-grafted comb macromolecules and characterize their structures, (2) characterize the mechanical properties of supramolecular polymers and elucidate the molecular basis of the properties, (3) conduct kinetic and thermodynamic studies to establish the cooperative assembly mechanisms in the supramolecular polymerization from macromolecular units, and (4) deduce the general principles involved in the design of synthetic macromolecular units for cooperative assembly and polymerizations. The proposed research could ultimately lead to the generation of polymeric systems that will approach the level of sophistication and complexity found in nature?s self-organized supramolecular polymers.NON-TECHNICAL SUMMARY:The remarkable physical properties of nanostructures assembled from biological macromolecules have long inspired scientists to create synthetic systems that work with similar precision and efficiency. Practical design of biologically inspired synthetic materials has emerged at the interface of polymer science, chemistry and biology, and may find applications in sustainable plastics, biomedical materials and renewable energy. The proposed research will create new macromolecular building blocks for controlled assembly, provide insights into the assembly mechanisms, and develop nanostructured materials with superior mechanical strength and self-healing properties. The growth of polymer research at such an interface provides opportunities to educate students and inspire them to pursue careers in science and engineering. The CAREER award will allow the PI to develop an integrated research and education program on Bioinspired Polymeric Materials at University of Connecticut. The program will address students' major needs for interdisciplinary education and high quality research experiences in this emerging field. The proposed outreach program seeks to: (1) integrate the proposed research with the development of interdisciplinary polymer courses; (2) provide vibrant polymer research experiences to undergraduates and high-school students and (3) promote polymer research and its impact on society through providing lectures for the general public. Emphasis will be given to involve underrepresented students at all levels.