Zeolite analogues based on oxysulfidometalate supertetrahedral clusters via coulombic interactions

Abstract

Four zeolite-like crystalline salts, T3-MEP and T4-MTN/DIA/LON (where MEP, MTN, DIA and LON are the topological codes), have been fabricated. They are self-assemblies of anionic supertetrahedral clusters of T3-[Sn10O4S20]8−/T4-[Sn4In12Zn4O4S31]10− and...

Parsimonious Topology Based on Frank-Kasper Polyhedra in Metal–Organic Frameworks

“…16 Originally proposed by Frank and Kasper to explain intermetallic solids (Figure 1b), these FK polyhedra are extremely versatile units capable of forming several thousand actual and hypothetical topologies. 17−20 Particularly, one of the topologies, known as mep (or clathrate type I) topology, is astonishingly ubiquitous, as can be seen in zeolites, 21−23 gas clathrates, 24,25 Zintl phases, 26−30 inorganic salt, 31 soap froth, 32 metal foam, 33 and even architecture, 34 thus attracting intense interest in various disciplines (Figure 1c). 35−49 Despite the popularity of other solid-state materials, to our surprise, there is no single-crystal structure reported with mep topology in MOFs, 2 whereas another FK topology, mtn (or clathrate type II), is known.…”

“…Notable examples of such underexplored MOFs are those based on four Frank–Kasper (FK) polyhedra (dodecahedron, tetradecahedron, pentadecahedron, and hexadecahedron), shown in Figure a . Originally proposed by Frank and Kasper to explain intermetallic solids (Figure b), these FK polyhedra are extremely versatile units capable of forming several thousand actual and hypothetical topologies. − Particularly, one of the topologies, known as mep (or clathrate type I) topology, is astonishingly ubiquitous, as can be seen in zeolites, − gas clathrates, , Zintl phases, − inorganic salt, soap froth, metal foam, and even architecture, thus attracting intense interest in various disciplines (Figure c). − …”