Functional Ortho-Phenyleneethynylenes

该项目旨在合成和自组装新型邻苯乙炔(OPE)化合物，这些化合物对于推进具有特定材料性能的纳米材料领域非常重要，可能在传感器等固态器件中应用。杂环模块将引导OPE的自组装成为螺旋折叠或线性延伸的纳米结构。金属离子将被用来制造自组装纳米网格。根据所选择的自组装模式，这些OPE中的共轭可以随意开启和关闭，而不会改变苯乙炔的一级结构。螺旋折叠的Opes有一个很大的外表面，几乎没有可接近的内腔，类似于螺旋蛋白质。根据所用单体的不同，特定部位的成分将装饰螺旋结构。因此，具有高度进化的外表面的螺旋是可以识别的位置，被认为是可以实现的。这些装饰表面将提供一种方式来操纵螺旋向片层、胶束和其他超结构的聚集。将金属离子成功地配位到含吡嗪的有机配体上，将会形成新型的发光金属超分子纳米晶格。这种迄今未知的二维共轭纳米结构在传感、器件和半导体纳米存储应用方面具有令人兴奋的前景。本项目将合成一类新型邻苯乙炔(OPE)化合物，有望组装成延伸的螺旋和网格型纳米结构。自组装过程由化学环境确定的特定替代模式指导。总体目标是开发新型共轭低聚物，显示出与传感器等高效设备的发明相关的诱人的发射和感官属性。拟议的研究对于教育和培训年轻的科学家和工程师在当前国家利益极高的领域工作很重要。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.