Department of Chemistry , Johns Hopkins University , 3400 N. Charles Street , Baltimore , Maryland 21218 , United States.
J Am Chem Soc. 2018 May 9;140(18):5976-5986. doi: 10.1021/jacs.8b02541. Epub 2018 Apr 25.
Silicon nanomaterials combine earth abundance and biodegradability with exceptional electronic properties. Strategic synthesis promises access to novel architectures with well-defined surface structure, size, and shape. Herein, we describe a five-step synthesis of functional macrocyclic polysilanes. Comparison of the materials isolated from isomeric building blocks provides evidence that building block directionality controls the shape of the resulting nanomaterial. Infrared (IR) and H and Si NMR spectroscopies, coupled to computational data, provide evidence of a well-defined Si-H and Si-Me terminated structure. The intrinsic porosity and the polarization arising from the hydridic character of the Si-H bond suggest applications in lithium-ion batteries, which are supported by quantum chemical calculations.
硅纳米材料将地球丰度和生物降解性与卓越的电子性能结合在一起。战略合成有望获得具有明确定义的表面结构、尺寸和形状的新型结构。在此，我们描述了一种功能化大环聚硅烷的五步法合成。对来自异构构建块的材料的比较提供了证据，证明构建块的方向性控制了所得纳米材料的形状。红外（IR）和 H 和 Si NMR 光谱，加上计算数据，提供了明确的 Si-H 和 Si-Me 端基结构的证据。Si-H 键的氢化物特性引起的固有孔隙率和极化，表明在锂离子电池中有应用，这得到了量子化学计算的支持。
