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Metal Complexes of Organophosphate Esters and Open-Framework Metal Phosphates: Synthesis, Structure, Transformations, and Applications

“…Since the discovery of first microporous zinc phosphates with zeolite-like topologies by Stucky and co-workers, a large number of zinc phosphates have been synthesized in the presence of organic, as well as inorganic templates. – ,,,,,,– …”

“…It is difficult to discuss all the 2D structure types (see Table ), and we will limit ourselves to a few typical ones. Among the structures with strictly alternating ZnO 4 and PO 4 tetrahedra, the commonly found one is that with a Zn/P ratio of 2/3 where a 12-membered bifurcated aperture is formed when the HPO 4 groups cross-link zigzag ladders (Figure b). ,,,, Then, there are also structures with 4.8 ,,, and 4.6.8 nets. Among the sheet structures with a tricoordinated oxygen, a stoichiometry of Zn 6 (HPO 4 ) 2 (PO 4 ) 4 with a Zn/P ratio of unity is the most common ,,,,, (Figure ).…”

Layered zincoarsenate templated byN,N,N′,N′-tetramethylethylene-diamine molecules

“…Replacement of phosphate by arsenate in the framework leads to a variety of phases (Bu et al, 1998;Harrison et al, 1999), some of which are analogous to zincophosphates (Harrison et al, 1999). In our search for novel framework structures containing zinc in combination with P or As atoms, we have discovered two new zincophosphate materials, namely Zn 2 (HPO 4 ) 2 Cl 2 Á2C 6 H 14 N (Trojette et al, 1998) (Hajem et al, 1999). As part of these studies, we have examined the structure of [H 3 NC 6 H 12 NH 3 ] 0.5 [Zn 2 (AsO 4 )-(HAsO 4 )(H 2 O) 2 ], (I), and report here its synthesis and structural characterization.…”