S. Neeraj, S. Natarajan, C. Rao
May 1, 1999
Citations
0
Influential Citations
62
Citations
Journal
Chemistry of Materials
Abstract
A new open-framework zinc phosphate, [NH 3 (CH 2 ) 2 NH(CH 2 ) 2 NH 3 ] 2+ 2[Zn 2 PO 4 (HPO 4 )] - , possessing a layered architecture and consisting of alternating inorganic and organic layers, stabilized by multipoint hydrogen bonding has been synthesized hydrothermally. It has the following crystal data: monoclinic space group C2/c, a = 25.075(5) A, b = 5.127(1) A, c = 17.726(4) A, β = 125.4(1)°, V = 1857.6(6) A 3 , Z = 8, M = 748.3(1), D calc = 2.06 g cm -3 , MoKα, and R F = 0.04. The structure is made up of ZnO 4 and PO 4 tetrahedra linked though vertexes. The connectivity between the two units creates a layered structure with steps, the layers consisting of three- and four-membered rings only. This is the first instance of such a network in open-framework zinc phosphates. The exclusive presence of three-membered ring chains creates steps in the layers as well as an infinite number of Zn-O-Zn one-dimensional chains. Hydrogen bond interactions between the inorganic layers give rise to pseudo 10-membered ring channels, in which the diprotonated diethyelenetriamine molecules reside. The unusual T atom (T being Zn or P) connectivity in this material suggests the possibility of synthesizing many such materials with novel connectivities and networks.