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DD6.14.1

Surfactant Templated Assembly of Cubic Mesostructured Semiconductors Based on [Sn2Se6]4- and Pt2+ in Single-Crystal Form. Pantelis N. Trikalitis and Mercouri G. Kanatzidis Department of Chemistry, Michigan State University, East Lansing, MI 48824 Abstract Mesostructured non-oxidic materials with cubic Ia-3d symmetry were prepared by linking [Sn2Se6]4- clusters with Pt2+ in the presence of surfactant molecules. The use of long chain pyridinium-based surfactants (octadecyl- and eicosadecyl) afforded materials with exceptionally high cubic pore order and single-crystal particle morphology. By contrast trimethylammonium-based surfactants produced cubic mesostructured solids with inferior overall quality. We have also synthesized materials with significantly lower surfactant content by increasing the Pt2+:[Sn2Se6]4- molar ratio, while maintaining the cubic pore symmetry. All materials are semiconductors with energy band-gap in the range 0.9

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