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Templated Synthesis of Electroactive Periodic Mesoporous Organosilica Bridged with Oligoaniline
Author(s) -
Guo Yi,
Mylonakis Andreas,
Zhang Zongtao,
Yang Guoliang,
Lelkes Peter I.,
Che Shunai,
Lu Qinghua,
Wei Yen
Publication year - 2008
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200701605
Subject(s) - tetraethyl orthosilicate , mesoporous organosilica , materials science , mesoporous material , cyclic voltammetry , ammonium bromide , silsesquioxane , polyaniline , polymer chemistry , nuclear chemistry , inorganic chemistry , chemical engineering , organic chemistry , chemistry , electrochemistry , polymerization , mesoporous silica , nanotechnology , pulmonary surfactant , polymer , electrode , composite material , engineering , catalysis
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.