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Supramolecular Assembly of pH-Sensitive Triphenylene Derived π-Gelators and Their Application as Molecular Template for the Preparation of Silica Nanotubes

机译:pH敏感的三亚苯基衍生的π-胶凝体的超分子组装及其作为制备硅胶纳米管的分子模板的应用

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The gelation properties and mode of self-assembly of six asymmetrical hexaether triphenylene derivatives mono-functionalized with carboxylic and primary amine groups were investigated. The presence of a carboxylic and amine group attached to the triphenylene core generated stable, thermo- and pH-sensitive supramolecular π-organogels with a reversible response to both stimuli. In order to understand the gelation process, we studied the effect of the spacer length and found a different gelation scope for the acid and basic derivatives that accounts for a different supramolecular self-assembly. The presence of the basic group on the amino derivatives was used to guide and catalyze the templated in situ sol-gel polymerization of TEOS and allowed us, under controlled hydrolytic conditions, to prepare an entangled fibrillar network of silica nanotubes.
机译:研究了用羧基和伯胺基单官能化的六种不对称六醚六亚苯基联苯衍生物的胶凝性能和自组装方式。附着在三亚苯基核心上的羧基和胺基的存在会产生稳定的,对热和pH敏感的超分子π-有机胶体,对两种刺激均具有可逆的响应。为了理解凝胶化过程,我们研究了间隔物长度的影响,并发现了造成不同超分子自组装的酸和碱性衍生物的不同凝胶化范围。氨基衍生物上碱性基团的存在用于指导和催化TEOS模板化的原位溶胶-凝胶聚合,并允许我们在受控的水解条件下制备二氧化硅纳米管的缠结纤维状网络。

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