Synthesis, crystal structure and fluorescent characterization of a novel lanthanide tetraphosphonate with a layered structure

Hydrothermal synthesis and crystal structures of two new divalent metal phosphonates with layered structure

“…The use of the aminodiphosphonic acid, RN(CH 2 PO 3 H 2 ) 2 in the synthesis of metal phosphonates has resulted in the formation of 2D or 3D open-frameworks [10][11][12][13]. For instance, Cd(H 3 L) 2 (H 4 L ¼ C 6 H 5 CH 2 N(CH 2 PO 3 H 2 ) 2 ) features double chains that are further interlinked by hydrogen bonds [14].…”

catena-Poly[bis{μ-dihydrogen [(5-carboxypentylimino)dimethylene]diphosphonato-κ2O:O′}cadmium(II)]

“…Metal phosphonates can exhibit structural types such as zero-dimensional , one-dimensional chain (Yang et al, 2005), two-dimensional layered (Zheng et al, 2002) or threedimensional microporous (Burkholder et al, 2004). It has been proved that attaching an additional functional group, such as carboxyl, hydroxy, amine or crown ether groups, to the phosphonic acid group is a very useful method for building open-framework structures (Cheetham et al, 1999;Stock, Frey et al, 2000;Serpaggi & Fé rey, 1999;Ying et al, 2006). Amongst these functional groups, the carboxyl group has been widely used because of its coordination ability.…”

Bis[μ-(2-carboxylatoethyl)phosphonato]bis[aqua(2,2′-bipyridine)cobalt(II)]

“…material chemistry (Clearfield 1998). Many metal phosphonates have been reported (Cheetham et al, 1999;Stock et al, 2000;Serpaggi & Férey, 1999;Ying & Mao, 2004;Ying et al, 2006). The metal phosphonates can exhibit various kinds of structure.…”