Study of Local Molecular Ordering in Layered Surfactant-Silicate Mesophase Composites

Journal Article · Thu Jan 16 04:00:00 EST 2003 · Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical

DOI:https://doi.org/10.1021/jp021512y· OSTI ID:15003091

Wang, Li Q; Exarhos, Gregory J

We have synthesized layered surfactant-silicate mesophase composites using surfactant-templated synthetic routes under hydrothermal conditions and demonstrated a molecular ordering process that drives self-assembly. Local molecular ordering in both the bound surfactant and the inorganic framework for these mesophase composites has been observed and investigated using solid-state NMR and x-ray diffraction techniques. Synthesis parameters were systematically varied in order to determine the key factors that influence the molecular ordering process. Dynamics and mobility of surfactant molecules at the interface have also been examined using NMR chemical-shift analyses, relaxation time studies, and 2D WISE measurements. Results from this current work are compared with studies reported on other surfactant-silicate mesoporous materials.

• Research Organization: Pacific Northwest National Lab., Richland, WA (US), Environmental Molecular Sciences Lab. (US)
• Sponsoring Organization: US Department of Energy (US)
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 15003091
• Report Number(s): PNNL-SA-37723; 2144; KC0201050
• Journal Information: Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical, Journal Name: Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical Journal Issue: 2 Vol. 107
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMPOSITE MATERIALS
ENVIRONMENTAL MOLECULAR SCIENCES LABORATORY
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MOLECULAR STRUCTURE
NUCLEAR MAGNETIC RESONANCE
SILICATES
SURFACTANTS
SYNTHESIS
X-RAY DIFFRACTION