Two-Dimensional Polymers

本世纪的聚合物科学主要集中在直链及其衍生物，如星形聚合物、环、梳子、梯子，以及非线性延伸，如支化聚合物和三维网络。这是一项探索将构成“主体”聚合物的分子转化为类似于具有“低聚”厚度的薄片的二维形式的建议。主要研究人员已经确定了一种可能的合成途径来实现这一目标，但方法涉及使用相当复杂的前体。这里提出的工作主要是针对二维聚合物的路径的合成简化。具体地说，建议遵循几种不同复杂程度的方法。一种方法涉及使用带有联苯核的小分子，另一种方法是使用活性聚合来构建必要的反应性低聚物。其他合成途径类似于首席研究员实验室中已经使用对映体富集手性前体开发的合成途径。在新的方法中，放宽了对映体纯度的要求，取代了几个立体中心的存在。这是探索性研究(SGER)的一小笔赠款。

Polymer science in this century has focused on the linear chain and its derivatives such as star polymers, rings, combs, ladders, as well as nonlinear extensions such as branched polymers and three dimensional networks. This is a proposal to explore the conversion of molecules making up "bulk" polymers to two-dimensional forms analogous to sheets with thicknesses of "oligomeric" dimension. The principal investigators has already identified a possible synthetic pathway to achieve this goal but the methodology involves the use of fairly complex precursors. The work proposed here is aimed primarily at the synthetic simplification of pathways for two-dimensional polymers. Specifically it is proposed to follow several approaches with different levels of complexity. One approach involves the use of smectogens with biphenylic cores, and another the use of living polymerization to construct the necessary reactive oligomers. Other synthetic pathways are similar to those already developed in the principal investigator's laboratory using enantiomerically enriched chiral precursors. In the new approach, the requirement of enantiomeric purity is relaxed and substituted for the presence of several stereogenic centers. This is a Small Grant for Exploratory Research (SGER).