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Mesoporous germanate
COURTESY OF XIADONG ZHOU
Within their regular nanoscale holes, mesoporous materi- als offer excellent accommodations for chemical processes such as catalysis and adsorption. Xiaodong Zou of Sweden s Stockholm University and coworkers have prepared a novel inorganic mesoporous material that promises to broaden the scope of these structures (Nature 2005, 437, 716). The new material (shown) is made of Ge10O24(OH)3 clusters linked through Ge-O-Ge bonds. Zou s germanate structure is both mesoporous and crystalline, combining the regular structure of a smaller pored material with large pores that can be used in catalysis. This combination of properties is rare in inorganic mesoporous materials, most of which are amorphous and therefore lack the shape selectivity of crystalline materials. The material has the largest cell volume of any inorganic substance, according to the report. Pore space accounts for more than half of the germanate s total volume. Zou s group also prepared a chiral version of the mesoporous germanate, which could offer sites for stereoselective reactions



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