Incorporation of Triazacyclononane into the Metal Phosphonate Backbones

Abstract

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 x 1.5 H2O (1) and UO2{C9N3H19(PO3H)3} x 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.

The First Family of Actinide Carboxyphosphinates: Two‐ and Three‐Dimensional Uranyl Coordination Polymers

“…These bipyramidal polyhedra, together with their various oligomers combined with organic ligands, allow diverse uranyl-organic materials to be generated. [8][9][10][11][12][13][14][15][16][17][18][19] As a result it is possible to obtain uranyl phosphinates with significant diversification in their structures.…”

Synthesis and Characterization of 1‐, 2‐, and 3‐Dimensional Bimetallic UO22+/Zn2+ Phosphonoacetates

“…[1][2][3] In spite of this relevance to separations and nuclear fuel stewardship, our knowledge of the structural chemistry of actinide phosphonates has largely been limited to those uranyl phenylphosphonates reported by Clearfield et al, [4][5][6][7][8][9][10][11][12] as well as a handful of other compounds. [13][14][15][16][17][18] More recently, in an effort to probe the structural chemistry of uranyl phosphonate compounds and extend the known catalog of these materials beyond monophosphonates, the interaction of UO 2 2+ with polyphosphonate [19][20][21][22][23][24] and carboxyphosphonate ligands [25][26][27] has been explored. These ligands are attractive candidates for materials synthesis due to the range of metal-to-ligand binding modes and the potential for novel structural topologies.…”

Structural chemistry of uranium phosphonates

“…synthesis of uranyl phosphonates. In 2006, Zheng and coworkers [24] prepared a layered structure, (UO 2 )(H 4 nopt)·H 2 O, by using this ligand. In this structure, the isolated uranyl pentagonal bipyramids and PO 3 H moieties form infinite chains which are joined by triazacyclononane groups resulting in an overall sheet topology (Fig.…”

“…In the 1990s, Clearfield and coworkers [17][18][19][20][21][22] reported a series of uranium phenylphosphonates with chain or tube structures. After that, the occurrence of uranium phosphonates was sporadic [23,24]. The number of reported uranium phosphonates has skyrocketed due in part to innovative synthetic strategies, which include modulation of the phosphonate ligand, incorporation of transition metals, addition of co-ligands, and introduction of structure-directing agents.…”