title: Templated synthesis of electroactive periodic mesoporous organosilica bridged with oligoaniline.
abstract: 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.
authors.affiliation: Department of Chemistry, Drexel University, Philadelphia, Pennsylvania 19104, USA.
authors.forename: Yi
authors.initials: Y
authors.lastname: Guo
authors.forename: Andreas
authors.initials: A
authors.lastname: Mylonakis
authors.forename: Zongtao
authors.initials: Z
authors.lastname: Zhang
authors.forename: Guoliang
authors.initials: G
authors.lastname: Yang
authors.forename: Peter I
authors.initials: PI
authors.lastname: Lelkes
authors.forename: Shunai
authors.initials: S
authors.lastname: Che
authors.forename: Qinghua
authors.initials: Q
authors.lastname: Lu
authors.forename: Yen
authors.initials: Y
authors.lastname: Wei
mesh_terms: D000814:Aniline Compounds / Q000737:chemistry*; D000077286:Cetrimonium; D002593:Cetrimonium Compounds / Q000737:chemistry; D004563:Electrochemistry; D006868:Hydrolysis; D046529:Microscopy, Electron, Transmission / Q000379:methods; D015394:Molecular Structure; D017646:Organosilicon Compounds / Q000737:chemistry*; D010316:Particle Size; D016062:Porosity; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods; D013499:Surface Properties; D013818:Thermogravimetry; D014961:X-Ray Diffraction
chemical_list: D000814:Aniline Compounds; D002593:Cetrimonium Compounds; D017646:Organosilicon Compounds; D000077286:Cetrimonium