Stereochemistry of Nanomolecules

将在三个相关领域进行研究。在第一部分中，杂三尖晶石将被用作纳米结构的构建块。这些分子的分子质量超过1000道尔顿将被研究的包合物的形成，以及极化率和电子转移涉及的芳香族体系。在第二部分中，我们将基于图论合成拓扑立体异构体缠绕网络。第三部分完成了碗状多环芳烃的合成。动态核磁共振波谱将研究碗到碗反转的动力学。这些化合物的衍生物将偶联，形成与富勒烯片段相关的大环番。来自有机动力学项目的这笔资金支持加州大学圣地亚哥分校的杰伊·S·西格尔教授的工作。将合成包含内腔的大分子。将研究其他分子在这些空腔中的包裹体，以及分子内的相互作用，这将被光谱检测到。将制备碗形大分子，并用光谱方法确定碗对碗的反转势垒。这些碗状分子还将结合在一起，产生与富勒烯相关的片段，富勒烯是最近发现的一种碳的同素异形体。最后，分子将在原子链缠绕的地方合成。这种特殊的缠绕模式是基于图论，这是一门数学学科。

Research in three related areas will be pursued. In the first part, heterotriangulenes will be used as building blocks for nanostructures. These molecules with molecular weights of over 1000 Daltons will be investigated with regard to inclusion compound formation, and polarizability and electron-transfer involving the pi-aromatic systems. In the second part, topologically stereoisomeric entwined networks will be synthesized, whose structures are based on graph theory. In the third part, the synthesis of bowl-shaped polycyclic aromatic hydrocarbons will accomplished. The dynamics of the bowl-to-bowl inversion will be studied by dynamic NMR spectroscopy. Derivatives of these compounds will be coupled to form macrocyclophanes related to fullerene fragments. %%% This grant from the Organic Dynamics Program supports the work of Professor Jay S. Siegel at the University of California, San Diego. Large molecules will be synthesized which contain internal cavities. Inclusion of other molecules into these cavities will be studied as well as the intramolecular interactions which will be detected spectroscopically. Bowl-shaped large molecules will be prepared and the bowl-to-bowl inversion barrier will be determined by spectroscopic methods. These bowl-shaped molecules will also be coupled to produce fragments related to fullerene, a recently discovered allotrope of carbon. Finally, molecules will be synthesized where chains of atoms become entwined. The particular entwined pattern is based on graph theory, a mathematical discipline.