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首页> 外文期刊>The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical >A Novel Supramolecular Organogel Nanotubular Template Approach for Conducting Nanomaterials
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A Novel Supramolecular Organogel Nanotubular Template Approach for Conducting Nanomaterials

机译：一种新型的超分子有机凝胶纳米管模板导电纳米材料。

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摘要

We report a unique supramolecular organogel template approach for conducting polyaniline nanomaterials. A novel organogel based on sulfonic acid dopant was designed and developed from renewable resource 3-pentadecyl phenol via ring-opening of 1,4-butane sultone. The amphiphilic dopant molecule formed thermo-reversible supramolecular organogel in highly polar solvents like alcohols. The self-assembled fibril network morphology of the gel was confirmed by scanning electron microscopy (SEM) and atomic force microscopy. Transmission electron microscopy (TEM) revealed that the inner part of the fibrous gel is nanotubular with the pore diameter of ~75 nm. The organogel nanotubular morphology was retained even in the presence of aniline +dopant complex, and the aniline monomers occupied the hydrophobic nanopockets provided by the amphiphilic dopant. The chemical oxidative polymerization of the dopant-1-aniline organogel template produced well-defined polyaniline nanofibers. The polymerization was carried out at various temperatures to establish the role of the physical state and stability of the organogel on the morphology. The sulfonic acid molecule acts both as self-assembled molecular template for the synthesis of polymer nanomaterial as well as anionic counterpart for stabilizing the positively charged conducting polymer chains. The gel template played a pivotal role in directing polyaniline chains to form nanofibers and also manipulating the number of other properties such as conductivity, solubility, percent crystallinity, and solid-state ordering, etc. Temperature-dependent electrical conductivity measurements revealed that the nanomaterials showed typical linear ohmic behavior and also followed the 3-D VRH model at elevated temperatures.
机译：我们报告了一种用于进行聚苯胺纳米材料的独特的超分子有机凝胶模板方法。从可再生资源3-十五烷基苯酚通过1,4-丁烷磺酸内酯的开环设计和开发了一种基于磺酸掺杂剂的新型有机凝胶。两亲性掺杂剂分子在诸如醇的高极性溶剂中形成热可逆的超分子有机凝胶。凝胶的自组装原纤维网络形态通过扫描电子显微镜（SEM）和原子力显微镜确认。透射电子显微镜（TEM）表明，纤维凝胶的内部是纳米管，孔径约75nm。即使在存在苯胺+掺杂剂复合物的情况下，有机凝胶纳米管的形态也得以保留，并且苯胺单体占据了两亲性掺杂剂提供的疏水性纳米口袋。掺杂剂-1-苯胺有机凝胶模板的化学氧化聚合反应产生了定义明确的聚苯胺纳米纤维。聚合是在各种温度下进行的，以确立有机凝胶的物理状态和稳定性对形态的作用。磺酸分子既充当用于合成聚合物纳米材料的自组装分子模板，又充当用于稳定带正电的导电聚合物链的阴离子对应物。凝胶模板在引导聚苯胺链形成纳米纤维以及操纵许多其他特性（例如电导率，溶解度，结晶度百分比和固态有序性等）方面起着关键作用。取决于温度的电导率测量表明，纳米材料显示出典型的线性欧姆行为，并且在高温下也遵循3-D VRH模型。

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