Dendritic and Hybrid Linear-Globular Molecules: Design and Synthetic Approaches

本研究的目的是探索设计， 树枝状分子及其杂化物的合成和性质 含有线性和球形片段的聚合物结构。 主要目标包括制备规则的树枝状分子 具有官能化链端的超支化聚合物 一步缩聚反应，和混合线性-球形 其中树枝状（球状）片段将 有助于大幅修改线性的属性， 聚合物片段。 为了制备规则的、尺寸单分散的 树枝状结构，包括逐步和加速方法 将使用涉及新单体的聚合物。 的化学修饰 位于链端或内部的官能团 树枝状分子层将用于许多 目的如产生新型胶束结构。 这些胶束结构由单分子组成， 其中疏水外层围绕内部亲水层 （反胶束）或反之亦然（正常胶束）。 独特的 控制架构提供的收敛方法， 树枝状分子的合成将被用来创造不寻常的 聚合物拓扑学 结构-性能研究 这些分子的关系将有助于 知识的进步可以为当前的问题提供新的解决方案。 技术问题。 这项研究是针对生产一种新的形式， 物质：具有任何物质都不能制成的球形聚合物 其他已知的方法。 这些球状聚合物可能是 专为广泛的新兴先进应用而设计 技术，如分子电子学， 微反应器将允许更有效的化学过程， 在大幅度减少环境污染的同时， 问题，或消除水中的剧毒污染物。

The objectives of this research are to explore the design, synthesis, and properties of dendritic molecules as well as hybrid polymer structures containing both linear and globular fragments. Main targets include the preparation of regular dendritic molecules with functionalized chain-ends, hyper-branched polymers prepared in a one-step polycondensation reaction, and hybrid linear-globular copolymers in which the dendritic (globular) fragment will contribute to modify drastically the properties of the linear polymer fragment. In order to prepare regular, size monodisperse dendritic structures, both stepwise and accelerated approaches involving new monomers will be used. The chemical modification of functionalities located at the chain ends or within the inner layers of the dendritic molecules will be used for a number of purposes such as the creation of novel type of micellar structures. These micellar structures are constituted of single molecules in which a hydrophobic outer layer surrounds inner hydrophilic layers (reverse micelle) or vice-versa (normal micelle). The unique control over architecture afforded by the convergent method of synthesis of dendritic molecules will be used to create unusual polymer topologies. The study of structure-properties relationships for these molecules will contribute to the advancement of knowledge may provide novel solutions to current technological problems. This research is directed toward the production of a new form of matter: polymers with a globular shape that cannot be made by any other known method. These globular polymers may be uniquely engineered for applications in a broad array of emerging advanced technologies such as molecular electronics, the design of microreactors that will allow more efficient chemical processes to be carried out with significant reduction in environmental problems, or the elimination of highly toxic pollutants from water.