The intercalation of cetyltrimethylammonium cations into muscovite by a two-step process: II. The intercalation of cetyltrimethylammonium cations into Li-muscovite

The alkylammonium cations were successively intercalated into the interlayer of muscovite. It was achieved by inorganic–organic ion exchange in the hydrothermal reaction of the LiNO 3-treated muscovite with cetyltrimethylammonium bromide solution. One-dimensional Patterson plots and electron density...

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Bibliographic Details
Published in:Journal of solid state chemistry 2006-05, Vol.179 (5), p.1525-1535
Main Authors: Yu, Xiaofeng, Zhao, Liyan, Gao, Xiuxiang, Zhang, Xiaoping, Wu, Nianzu
Format: Article
Language:English
Subjects:
AMMONIUM COMPOUNDS
BROMIDES
CATIONS
CTAB
ELECTRON DENSITY
FOURIER TRANSFORMATION
INFRARED SPECTRA
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
Intercalation
ION EXCHANGE
Layered silicate
LITHIUM IONS
LITHIUM NITRATES
MUSCOVITE
NUCLEAR MAGNETIC RESONANCE
SILICATES
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
X-RAY PHOTOELECTRON SPECTROSCOPY
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Summary:The alkylammonium cations were successively intercalated into the interlayer of muscovite. It was achieved by inorganic–organic ion exchange in the hydrothermal reaction of the LiNO 3-treated muscovite with cetyltrimethylammonium bromide solution. One-dimensional Patterson plots and electron density calculations show that hydrated Li + and CTA + cations entered the interlayer of muscovite successively. The CTA +-intercalated muscovite was characterized by powder X-ray diffraction and elemental analysis, in conjunction with FTIR, nuclear magnetic resonance, X-ray photoelectron spectra, high-resolution transmission electron microscopy, etc. The experiments show that organo-muscovite composite with ordered structure has been obtained. The CTA + headgroups are distributed in the interlayer uniformly. However, the arrangement and conformation of CTA + chains are strongly dependent upon the reaction temperature. At lower reaction temperature, the chains of CTA + ions adopt a little more disordered arrangement and have higher gauche/ trans conformer ratio, resulting in the disturbance to the interlayer symmetry. Whereas at higher reaction temperature, the sample with paraffin-like arrangement of CTA + chains could be obtained, in which the methylene chains of CTA + adopt a fully stretched, all- trans conformation. The CTA +-intercalated muscovite composite with ordered structure has been obtained. [Display omitted]
ISSN:0022-4596
1095-726X
DOI:10.1016/j.jssc.2006.02.007