Fabrication of nanotubes using self-assembry of liquid crystalline molecules

本研究的目的是合成以下纳米多孔聚合物。1)在与活性部分化学连接的核心化合物(多元醇或多氨基化合物)产生六方柱状液晶相后，材料聚合得到高度有序的聚合物。2)将核化合物从聚合物中去除，得到纳米孔道聚合物。在第一年，以六羟基三苯基为核心化合物，通过带有双键部分的酯键连接。然而，合成的化合物不稳定，无法得到单体化合物。第二年，多氨基化合物被用作核心化合物，并与具有双键的羧酸(3，4，5-三烷氧基肉桂酸，TACA)相互作用。这些超分子化合物显示出柱状液晶相。TACA与联吡啶、联吡啶和烷二胺生成1：2的超分子，呈现柱状液晶相。用高压汞灯对液晶相中的超分子化合物进行光照射。然而，这些聚合物并没有得到。现在，我们正在尝试将其他具有更多活性双键的羧酸进行光聚合，以获得纳米孔聚合物。

The purpose of this study is to synthesize nanoporous polymers as follows. 1) After generation of hexagonal columnar liquid crystal phases of core-compounds (polyalcohols or polyaminocompounds) chemically connected with reactive moieties, the materials are polymerized to give the highly ordered polymers. 2) The core-compounds are removed from the polymers to give the nanoporous polymers. In the first year, hexahydroxytriphenylene was used as the core-compound, and it was connected using ester junction with double-bond moieties. However, the compounds synthesized were unstable and the monomer compounds could not be obtained. In the second year, polyaminocompounds were used for the core-compounds and were interacted with carboxylic acids possessing a double bond (3,4,5-trialkyloxycinnamic acid, TACA). These supramolecular compounds exhibited their columnar liquid crystal phases. TACA generated 1:2-supramolecules with dipyridyl, dipyridylethylene, and alkylenediamine which exhibited the columnar liquid crystal phases. The supramolecular compounds in the liquid crystal phases were photoirradiated by a high pressure mercury lamp. However, the polymers were not obtained. Now, we are trying photopolymerization of other carboxylic acids which have more reactive double-bonds to get the nanoporous polymers.