Synthetic Self-Assembling Polyimides

小行星9807470 在自然界中，大分子自组装几乎是一个普遍存在的过程，产生复杂的三维结构和架构。柔性多肽和多糖被折叠并组装成具有示例性机械、识别和催化性质的材料。 提出了三种类似的自组装成精确尺寸和组织结构的合成聚酰亚胺。 由此产生的，六边形阵列，交织片，构象开关是独特的，由于其纳米尺度的尺寸，高度组织的拓扑结构，和完全合成的组合物。 因此，新的仿生和材料性能的预期。 设想的应用是：（1）理解生物自组装基本过程的模型;（2）合理设计的材料，如有机沸石和导体;（3）具有仿生特性的材料，如复制，特异性和模板能力。 然而，所提出的聚合物的最吸引人的属性是可以合成这些自组织材料的容易性和低成本。 所有三种聚酰亚胺都是由类似的骨架形成的，所述骨架由1，4，5，8-萘二酰亚胺连接的1，3-二取代苯组成。 这些合成聚合物可以通过常规聚合和加工技术由廉价的起始材料制备。 自我组装过程的效率补充了这种合成经济。 自发地，形成具有高保真度和特异性的分子内和分子间接触的阵列。 最后，聚酰亚胺的合成可及性及其组装的高度连贯结构使其能够合理地加工成更复杂的扩展架构和材料。 这个项目应该提高我们的能力，设计新材料，通过自组装过程中直接和良性的方式体现了自然。 ***

9807470 Shimizu In nature, macromolecular self-assembly is nearly an ubiquitous process, yielding complex three- dimensional structures and architectures. Flexible polypeptides and polysaccharides are folded and assembled into materials of exemplary mechanical, recognition, and catalytic properties. Proposed are three synthetic polyimides that similarly self-assemble into structures of precise dimensions and organization. The resulting, hexagonal array, interwoven sheets, and conformational switch are unique due to their nano-scale dimensions, highly organized topologies, and entirely synthetic composition. As a consequence, novel biomimetic and materials properties are anticipated. Envisioned are applications as: (1) models to understand the fundamental process of biological self-assembly; (2) rationally designed materials such as organic zeolites and conductors; (3) materials with biomimetic properties such as replication, specificity, and templating abilities. However, the most attractive attribute of the proposed polymers is ease and low cost with which these self- organizing materials can be synthesized. All three polyimides are fashioned from a similar framework composed of 1, 3- disubstituted benzenes linked by 1,4,5,8-naphthalene diimides. These synthetic polymers can be prepared by conventional polymerization and processing techniques from inexpensive starting materials. Complementing this synthetic economy is the efficiency of the self-assembly process. Spontaneously, arrays of intra-and intermolecular contacts are formed with high fidelity and specificity. Finally, the synthetic accessibility of the polyimides and highly coherent structures of their assemblies enable their rational elaboration into more complex extended architectures and materials. %%% This project should enhance our ability to design novel materials through self-assembling processes in a direct and benign way exemplified by nature. ***