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Title: A Zinc Phosphate Possessing Ladder-like Layers Made Up of Three- and Four-Membered Rings and Infinite Zn-O-Zn Chains
Authors: Neeraj, S
Natarajan, Srinivasan
Rao, C N R
Keywords: Molecular-Sieves
Issue Date: May-1999
Publisher: American Chemical Society
Citation: Chemistry Of Materials 11(5), 1390-1395 (1999)
Abstract: A new open-framework zinc phosphate, [NH3(CH2)(2)NH(CH2)(2)NH3](2+)2[Zn2PO4(HPO4)](-), 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) Angstrom, b = 5.127(1) Angstrom, c = 17.726(4) Angstrom, beta = 125.4(1)degrees, V = 1857.6(6) Angstrom(3), Z = 8, M = 748.3(1), D-calc = 2.06 g cm(-3), MoK alpha, and R-F = 0.04. The structure is made up of ZnO4 and PO4 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.
Description: Restricted Access
Other Identifiers: 0897-4756
Appears in Collections:Research Papers (Prof. C.N.R. Rao)

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