Design of three-dimensional open-framework structures from inorganic clusters

Abstract

A series of open-framework germanates and silicogermanates were synthesized (denoted as SU-n) hydro-/solvo-thermally. Their structures were built from a single or two types of inorganic clusters containing a number of well-defined Ge-O coordination polyhedra. Different arrangements and combinations of these clusters resulted in different open-framework structures including some germanate/silicogermanates with extra-large pores (16- 24 rings). Herein we present our recently discovered crystalline structures of SU-3, SU-8, SU-12, SU-44, SU-M and SU-MB. SU-M and SU-MB contain 30-ring channels and pores extending to the mesoporous range (> 20). © 2007 Elsevier B.V. All rights reserved