Templated synthesis of electroactive periodic mesoporous organosilica bridged with oligoaniline.
Templated synthesis of electroactive periodic mesoporous organosilica bridged with oligoaniline.
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DOI：
10.1002/chem.200701605
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发表时间：
2008-03
期刊：
影响因子：
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通讯作者：
Yi Guo;A. Mylonakis;Zongtao Zhang;Guoliang Yang;P. Lelkes;S. Che;Q. Lu;Yen Wei
中科院分区：
文献类型：
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作者：
Yi Guo;A. Mylonakis;Zongtao Zhang;Guoliang Yang;P. Lelkes;S. Che;Q. Lu;Yen Wei
报道了新型电活性周期介孔有机硅（PMO）的合成与表征。以氨基封端的苯胺三聚体（EBAT）的祖母绿碱为原料，通过一步偶联反应合成了N，N '-双（4'-（3-三乙氧基硅丙基脲基）苯基）-1，4-醌烯二亚胺（TSUPQD），并以其为有机硅源，与正硅酸乙酯（TEOS）按一定比例共缩合。采用水热溶胶-凝胶法，以阳离子表面活性剂十六烷基三甲基溴化铵（CTAB）为模板剂，丙酮为助溶剂，在弱碱性条件下成功制备了一系列新型MCM-41型硅质材料（TSU-PMO）。通过傅里叶变换红外光谱（FT-IR）、热重分析、X射线衍射、氮气吸附和透射电子显微镜（TEM）对所得的介孔有机硅进行了表征，结果表明该系列TSU-PMO具有六边形的介孔结构，孔径为2.1-2.8 nm。虽然随着有机桥负载量的增加，TSU-PMO的结构规则性和孔参数逐渐变差，但循环伏安法监测的电化学行为表明，掺入大津单元浓度越高，TSU-PMO的电活性越高。
The synthesis and characterization of novel electroactive periodic mesoporous organosilica (PMO) are reported. The silsesquioxane precursor, N,N'-bis(4'-(3-triethoxysilylpropylureido)phenyl)-1,4-quinonene-diimine (TSUPQD), was prepared from the emeraldine base of amino-capped aniline trimer (EBAT) using a one-step coupling reaction and was used as an organic silicon source in the co-condensation with tetraethyl orthosilicate (TEOS) in proper ratios. By means of a hydrothermal sol-gel approach with the cationic surfactant cetyltrimethyl-ammonium bromide (CTAB) as the structure-directing template and acetone as the co-solvent for the dissolution of TSUPQD, a series of novel MCM-41 type siliceous materials (TSU-PMOs) were successfully prepared under mild alkaline conditions. The resultant mesoporous organosilica were characterized by Fourier transform infrared (FT-IR) spectroscopy, thermogravimetry, X-ray diffraction, nitrogen sorption, and transmission electron microscopy (TEM) and showed that this series of TSU-PMOs exhibited hexagonally patterned mesostructures with pore diameters of 2.1-2.8 nm. Although the structural regularity and pore parameters gradually deteriorated with increasing loading of organic bridges, the electrochemical behavior of TSU-PMOs monitored by cyclic voltammetry demonstrated greater electroactivities for samples with higher concentration of the incorporated TSU units.