Three-Dimensional Open-Framework Cobalt(II) Phosphates by Novel Routes

Abstract

Two new three-dimensional open-framework cobalt phosphates, [C2N2H10]2[Co4(PO4)4]H2O, I, and [C4N3H16]3[Co6(PO4)5(HPO4)3]H2O, II, have been prepared by the reaction of amine phosphates with Co2+ salts. I could also be prepared by the reaction of the cobalt tris amine complex with H3PO4. The crystal data for I and II are as follows: phosphate I, orthorhombic, space group P212121 (no. 19), a = 10.277 (1) Å, b = 10.302 (1) Å, c = 18.836 (1) Å, V = 1994.2 (2) Å3, Z = 4; phosphate II, monoclinic, space group P21/c (No. 14), a = 31.950 (1) Å, b = 8.360 (1) Å, c = 15.920 (1) Å, β = 96.6 (1)°V = 4223.4 (2) Å3, Z = 4. The structures of both I and II are constructed from alternating CoO4 and PO4 tetrahedra. The connectivity leads to the formation of eight-membered channels in all the crystallographic directions resembling the aluminosilicate zeolite, merlinoite in the case of I and to a rather large, one-dimensional 16-membered channel in II. Strong hydrogen-bond interactions involving the amine and framework oxygens are present in both I and II.

Department(s)

Chemistry

Keywords and Phrases

Cobalt; Phosphate; Analytic Method; Article; Crystal Structure; Crystallography; Hydrogen Bond; Structure Analysis; Synthesis; X Ray Diffraction

International Standard Serial Number (ISSN)

0020-1669

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2000 American Chemical Society (ACS), All rights reserved.

Publication Date

01 Apr 2000

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