Ring and Cage Assemblies for Main Group Elements

Robert T.新墨西哥州大学化学系的潘恩是 由无机，生物无机和有机化学 化学系磷硼笼和环分子研究计划。本研究将着重于三配位主族原子的基本成键与断键过程。该项目的基本目标是开发主族环和多环化合物的新的通用合成方法，并探索将这些物种用作磷化硼固态材料的前体。具体而言，将制备具有大于五的核心原子核度的新的硼-磷笼和含有一个或多个杂原子的类似物，并且将开发无环结构单元作为笼组装的试剂。虽然磷化硼（BP）是一种具有潜在价值的电子特性的半导体，但它目前只能作为显示低电子迁移率且难以加工的不纯材料。这些特点阻碍了BP的商业化发展。本项目将制备由三维B-P骨架组成的分子笼分子。这些化合物，以及将少量第三种元素纳入笼中的密切相关的分子，将作为BP可以更容易和更干净地制造的前体进行检查。由于BP的小片段将在分子的核心中预先形成，因此可以精确控制所得BP的大小，从而有可能获得用作“量子限制半导体”的非常小的BP颗粒。

Dr. Robert T. Paine, Chemistry Department, University of New Mexico, is supported by the Inorganic, Bioinorganic, and Organometallic Chemistry Program of the Chemistry Division for the study of phosphorus-boron cage and ring molecules. The study will focus on the fundamental bond breaking and making processes of tricoordinate main group atoms. The basic objective of the project is the development of new, general synthetic methods for main group ring and polycyclic compounds and to explore the use of these species as precursors to boron phosphide solid state materials. Specifically, new boron-phosphorus cages with core atom nuclearities of greater than five and analogues that contain one or more heteroatoms will be prepared and acyclic building blocks will be developed as reagents for cage assembly. While boron phosphide (BP) is a semiconductor with potentially valuable electronic properties, it is currently only available as an impure material that displays low electron mobility and that is hard to process. These features have retarded commercial development of BP. In this project molecular cage molecules, which are composed of a three dimensional B-P framework, will be prepared. These compounds, together with closely related molecules that incorporate small amounts of yet a third element into the cage, will be examined as precursors from which BP can be made more easily and cleanly. As small fragments of BP will be preformed in the core of the molecules, precise control of the size of the resulting BP may be possible, leading to the possibility of obtaining very small particles of BP for use as `quantum-confined semiconductors.`