title: Formation of helical organic-inorganic hybrid silica nanotubes using a chiral anionic gelator.
abstract: Right-handed helical organic-inorganic hybrid silica nanotubes were prepared using a chiral anionic gelator with 3-aminopropyltrimethoxysilane as a co-structure-directing agent and 1,4-bis(triethoxysilyl)benzene, 4,4'-bis(triethoxysilyl)-1,1'-biphenyl, bis(triethoxysilyl)methane, 1,2-bis(triethoxysilyl)ethane, and 1,2-bis(triethoxysilyl)ethene as the precursors. The sol-gel reactions were carried out in a mixture of water and ethanol at the volume ratio of 2.2:1.8. The nanostructures were studied using field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). For 4,4'-biphenylene-silica nanotube, the circular dichroism spectrum indicates at least some of the biphenyl rings within the walls stack in chiral form. The TEM images taken after different reaction time reveal a cooperative mechanism. The growth of the organic self-assemblies and the adsorption of the hybrid silica oligomers occurred at the same time.
authors: Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China.
authors: Liwen
authors: L
authors: Wang
authors: Hairui
authors: H
authors: Wang
authors: Yi
authors: Y
authors: Li
authors: Wei
authors: W
authors: Zhuang
authors: Zhaoyong
authors: Z
authors: Zhu
authors: Yuanli
authors: Y
authors: Chen
authors: Baozong
authors: B
authors: Li
authors: Yonggang
authors: Y
authors: Yang
mesh_terms: D000838:Anions; D003460:Crystallization / Q000379:methods*; D005782:Gels / Q000737:chemistry; D007287:Inorganic Chemicals / Q000737:chemistry*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D036103:Nanotechnology / Q000379:methods; D043942:Nanotubes / Q000737:chemistry* / Q000648:ultrastructure*; D009930:Organic Chemicals / Q000737:chemistry*; D010316:Particle Size; D012822:Silicon Dioxide / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D000838:Anions; D005782:Gels; D007287:Inorganic Chemicals; D046911:Macromolecular Substances; D009930:Organic Chemicals; D012822:Silicon Dioxide