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Title of article :
Syntheses, structures and catalytic properties of one-dimensional lanthanide-dotp compounds [dotpH8 = 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetrakis-(methylenephosphonic acid)]
Author/Authors :
Ting-Hai Yang، نويسنده , , Kai Zhou، نويسنده , , Song-Song Bao، نويسنده , , Chengjian Zhu، نويسنده , , Li-Min Zheng، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2008
Pages :
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Abstract :
Based on 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetrakis-(methylenephosphonic acid) (dotpH8), compounds [Ln(dotpH7)(H2O)2]Cl2 · xH2O (1 · Ln) (Ln = La, Nd, Sm, Eu, Gd, Tb) and [Ln(dotpH7)(H2O)2](ClO4)2 · xH2O (2 · Ln) (Ln = Nd, Sm, Eu, Gd, Tb) are synthesized in aqueous solutions at low pH. Compounds within each kind are isostructural. Both show chain structures where the neighboring {LnO8} polyhedra are doubly bridged by {CPO3} tetrahedra through corner-sharing. The packing of chains, however, are different in the two cases. In 1 · Ln, each chain is surrounded by six equivalent chains, with the Cl− counterions and the lattice water molecules locating between the chains. In 2 · Ln, neighboring chains are connected via strong hydrogen bond interactions to form a supramolecular layer in the ab plane. The image counterions fill in the inter-layer spaces. The catalytic and luminescent properties are investigated.
Keywords :
Lanthanide , Polyazamacrocycle , phosphonate , Catalytic property , crystal structure
Journal title :
Inorganic Chemistry Communications
Link To Document :