Metal cages using a bulky phosphonate as a ligand

Abstract

The synthesis, structure, magnetic and electronic properties of soluble transition metal phosphonate cages utilizing tritylphosphonic acid (TPA) as ligand are reported.

Molecular Metal Phosphonates

“…45 All of the Co II ions are tetracoordinate due to the coordination action of [Ph 3 CPO 3 ] 2− and pyridine ligands. The phosphonate ligands are involved in a 3.111 bridging coordination mode (Figure 106).…”

“…Similar types of cage structures of main-group as well as transition metals phosphonates are known, as discussed above. 35,45,68,70,74,85,146,218,220 A This compound contains four Co II ions, two [HPMIDA] − , and two [PMIDA] 2− ligands. 245 The four Co II ions lie in a plane and are bound by tetradentate chelating PMIDA, along with two HPMIDA ligands ( Figure 107).…”

3d–4f Clusters with large spin ground states and SMM behaviour

“…1a-c,2 With tritylphosphonic acid (TPA) we have reported tetranuclear clusters of manganese, cobalt and copper where the copper cluster showed interesting EPR properties. 3 In contrast to the transition metal phosphonates, molecular assemblies containing mixed 3d-4f or purely 4f metal ions are rare. 4 In this communication we report the synthesis, structure and magnetic properties of multinuclear Cu II -Ln III clusters (Ln = Gd, Dy, Y) using TPA as ligand.…”

Syntheses, structures, thermal stabilities and luminescence of two new 3D zinc phosphonates

“…Pillared metal diphosphonates have been exploited as meso/ micro-porous materials [15][16][17]. Phosphonate clusters with manganese, iron, cobalt and copper, show interesting magnetism and strong third-order nonlinear optical (NLO) self-focusing effects [18][19][20]. Homochiral zinc and lanthanide phosphonates display 1D triple-strand helical chains and selective adsorption capacities for N 2 , H 2 O and CH 3 OH molecules [21,22].…”