核酸分子线：多层鸟嘌呤组装体中分子间带隙的直接测量。

Stacks of nucleic acids as molecular wires: direct measurement of the intermolecular band dispersion in multilayer guanine assemblies.

机构信息

School of Materials Science & Research Center for Integrated Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa, 923-1292, Japan.

出版信息

J Am Chem Soc. 2010 Sep 22;132(37):12808-10. doi: 10.1021/ja104839d.

DOI:10.1021/ja104839d

PMID:20806894

Abstract

The intermolecular band dispersion related to the highest occupied molecular orbital in highly ordered, hydrated multilayer films of the DNA base guanine has been measured using photon-energy-dependent ultraviolet photoelectron spectroscopy. A bandwidth of 331 ± 8 meV at room temperature and a small effective mass of about 1.11 times that of a free charge suggest a high intrinsic hole mobility along quasi-one-dimensional stacks formed perpendicular to layered, hydrogen-bound networks.

摘要

使用光子能量依赖的紫外光电子能谱，测量了高度有序的、水合的鸟嘌呤 DNA 碱基多层膜中与最高占据分子轨道相关的分子间带色散。在室温下，带宽为 331±8meV，有效质量约为自由电荷的 1.11 倍，表明沿垂直于层状氢键网络形成的准一维堆叠具有较高的本征空穴迁移率。