Functional Ortho-Phenyleneethynylenes

该项目旨在合成和自组装一个新的邻苯乙炔（OPE）库，这些化合物对于推进具有特定材料特性的纳米材料领域具有重要意义，可用于传感器等固态设备。杂环模块将引导OPEs的自组装成螺旋折叠或线性延伸的纳米结构。金属离子将被用来制作自组装纳米网格。根据所选择的自组装模式，这些OPEs中的共轭可以随意打开和关闭，而不改变亚苯基亚乙炔基的一级结构。螺旋折叠的OPEs将具有大的外表面，并且几乎没有可接近的内腔，类似于螺旋蛋白质。取决于所利用的单体，在限定位点处的组分将装饰螺旋结构。因此，具有高度进化的外表面的螺旋，作为识别位点，被认为是可实现的。这些修饰的表面将提供一种方法来操纵螺旋聚集向层状，胶束，和其他超结构。将金属离子成功地配位到含吡嗪的有机电致发光材料上，将形成新型的发光金属超分子纳米网格。本项目将合成一类新型的邻苯乙炔（OPE）化合物，这些化合物具有组装成延伸的、螺旋的和网格状的纳米结构的能力。自组装过程由化学环境决定的特定取代模式指导。总的目标是开发新的共轭低聚物，其显示出与发明有效装置如传感器相关的有吸引力的发射和感官属性。拟议的研究对教育和培训青年科学家和工程师在当前国家高度关注的领域工作具有重要意义。该项目由化学部和材料研究部共同资助。

This project aims to synthesize and self-assemble a library of novel ortho phenyleneethynylene (OPE), compounds important to advancing the area of nano-materials with specific materials properties for possible applications in solid-state devices such as sensors. Heterocyclic modules will steer the self-assembly of OPEs to helically folded or linearly-extended nano structures. Metal ions will be utilized to make self-assembled nano grids. Depending upon the selected self-assembly mode, the conjugation in these OPEs can be switched on and off at will, without change of the primary structure of the phenyleneethynylene. Helically folded OPEs will have a large external surface, and almost no accessible interior cavity, similarly to helical proteins. Constituents at defined sites depending upon the utilized monomer will decorate the helical structures. As a consequence, helices with highly evolved outside surfaces, being recognition sites, are viewed as achievable. These decorated surfaces will provide a way to manipulate the aggregation of helices towards lamellar, micellar, and other super-structures. Novel luminescent metallosupramolecular nano-grids will be formed when metal-ions are successfully used to coordinate pyrazine-containing OPEs. Such hitherto unknown 2D-conjugated nano-structures offer exciting prospects for potential applications in sensory, device, and semiconductor nano-memory applications.This project will synthesize a class of novel ortho phenyleneethynylene (OPE) compounds with expected capabilities to assemble into extended, helical and grid-type nano-structures. The self-assembly process is guided by specific substitution patterns determined by the chemical environment. The overall goal is to develop novel conjugated oligomers displaying attractive emissive and sensory attributes relevant to the invention of efficient devices such as sensors. The proposed research is important to the education and training of young scientists and engineers to work in areas of current high national interests. This project is being co-funded by the Chemistry Division and the Division of Materials Research.