π-π 相互作用诱导的由盘状溶致液晶模板化的二氧化硅介孔的垂直排列。

π-π interaction-induced vertical alignment of silica mesochannels templated by a discotic lyotropic liquid crystal.

机构信息

Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa, Nagoya 464-8603, Japan.

出版信息

J Am Chem Soc. 2010 Oct 6;132(39):13654-6. doi: 10.1021/ja106220j.

DOI:10.1021/ja106220j

PMID:20836502

Abstract

The development of vertically aligned mesochannels in organic/inorganic hybrid films is in high demand and a challenging issue. However, there are no clear guiding principles to attain the surface-mediated vertical alignment. This work proposes the first clear versatile strategy to achieve the vertical alignment by utilizing the π-π interaction between the organic template molecule of a planar discotic liquid crystalline and 2D π-plane of graphite. The crucial role of the π-π interaction can be verified by the exploration with other substrates such as silicon wafer surfaces with varied surface energy (water contact angle: 5°-105°), quartz plates, and polymer films, which provided common parallel alignment with respect to the substrate plane.

摘要

在有机/无机杂化膜中开发垂直取向的介孔道是一个非常需要解决的具有挑战性的问题。然而，目前还没有明确的指导原则来实现表面介导的垂直取向。本工作提出了第一个明确的通用策略，通过利用平面盘状液晶的有机模板分子与石墨的 2D π-平面之间的π-π相互作用来实现垂直取向。π-π相互作用的关键作用可以通过探索其他基底来验证，例如具有不同表面能的硅片表面（水接触角：5°-105°）、石英板和聚合物膜，它们相对于基底平面提供了常见的平行取向。