PNNL

Abstract

We have synthesized layered surfactant-silicate mesophase composites with local molecular ordering using surfactant-templated synthetic routes under hydrothermal conditions. The local molecular ordering in both the surfactant organization and the inorganic framework for the mesophase composites has been observed and investigated using solid-state NMR and x-ray diffraction techniques. Different synthetic conditions were explored in order to determine the key factors that influence the local molecular ordering. Dynamics and mobilit of surfactant molecules have also been examined using NMR chemical-shift analyses, relaxation time, and 2D WISE measurements. Results from the current study are compared with those from other surfactant-silicate mesoporous materials.