Incorporation of Triazacyclononane into the Metal Phosphonate Backbones

This paper reports the syntheses and crystal structures of a manganese and a uranyl phosphonate based on
1,4,7-triazacyclononane-1,4,7-triyl- tris(methylenephosphonic acid), namely, Mn3{C9N3H18(PO3)3}(H2O)6·1.5H2O (1)
and UO2{C9N3H19(PO3H)3}·H2O (2). Compound 1 shows a unique layer structure where the hydrophobic
triazacyclononane moieties all reside on one side of the inorganic backbone of the manganese phosphonate layer
while the hydrophilic coordinated water molecules reside on the other side. In compound 2, the triazacyclononane
moieties are immobilized on the inorganic backbone of the uranyl phosphonate chains. The magnetic properties of
compound 1 and the ion exchange properties of compound 2 have been studied.