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

Journal Article · Mon May 15 04:00:00 EDT 2006 · Journal of Solid State Chemistry

OSTI ID:20785018

Xiaofeng, Yu ^[1]; Liyan, Zhao ^[1]; Xiuxiang, Gao ^[2]; Xiaoping, Zhang ^[3]; Nianzu, Wu ^[1]

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1. State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Physical Chemistry, Peking University, Beijing 100871 (China)
2. Laboratory Center, Research Institute of Petroleum Exploration and Development, PetroChina, P.O. Box 910, Beijing 100083 (China)
3. Electron Microscopy Laboratory, Peking University, Beijing 100871 (China)

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{sub 3}-treated muscovite with cetyltrimethylammonium bromide solution. One-dimensional Patterson plots and electron density calculations show that hydrated Li{sup +} and CTA{sup +} cations entered the interlayer of muscovite successively. The CTA{sup +}-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{sup +} headgroups are distributed in the interlayer uniformly. However, the arrangement and conformation of CTA{sup +} chains are strongly dependent upon the reaction temperature. At lower reaction temperature, the chains of CTA{sup +} 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{sup +} chains could be obtained, in which the methylene chains of CTA{sup +} adopt a fully stretched, all-trans conformation.

• OSTI ID: 20785018
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 5 Vol. 179; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
AMMONIUM COMPOUNDS
BROMIDES
CATIONS
ELECTRON DENSITY
FOURIER TRANSFORMATION
INFRARED SPECTRA
ION EXCHANGE
LITHIUM IONS
LITHIUM NITRATES
MUSCOVITE
NUCLEAR MAGNETIC RESONANCE
SILICATES
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
X-RAY PHOTOELECTRON SPECTROSCOPY