Seven novel Sr(II)-Sm(III) and Sr(II)-Dy(III) coordination polymers: construction of five classes of structural topologies using different amounts of imidazole

Dalton Trans. 2013 Jul 21;42(27):10011-8. doi: 10.1039/c3dt50453k. Epub 2013 May 28.

Abstract

The employment of pyridine-2,6-dicarboxylic acid (H2pda) and imidazole (im) in the synthesis of Sr(II)-Sm(III) and Sr(II)-Dy(III) coordination polymers has been reported. Seven novel heterometallic coordination polymers of compositions, [Dy3Sr3(pda)7(Hpda)(H2O)9]·6H2O (1), [LnSr(pda)3(H2O)5]·Him·H2O (Ln = Sm(2), Dy(3)), [Ln2Sr(pda)6(H2O)5]·4Him·C2H5OH·nH2O (Ln = Sm(4), n = 4; Dy(5), n = 5), [Sm2Sr2(pda)5(H2O)9]·2H2O (6) and [DySr(pda)3(H2O)4]·Him·3H2O (7), have been prepared and characterized. Complexes 1, 2-3, and 6 display three varieties of 2-D structures. 4-5 and 7 exhibit two types of 1-D chain structures. The structures of the complexes could be controlled via choosing appropriate starting materials and tuning the amount of imidazole. The photo-luminescent properties of these complexes have been investigated. The results show the exclusive luminescence emission bands being characteristic of Sm(III) and Dy(III).

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Dysprosium / chemistry*
  • Imidazoles / chemistry*
  • Models, Molecular
  • Molecular Structure
  • Organometallic Compounds / chemical synthesis
  • Organometallic Compounds / chemistry*
  • Polymers / chemistry*
  • Samarium / chemistry*
  • Strontium / chemistry*

Substances

  • Imidazoles
  • Organometallic Compounds
  • Polymers
  • Dysprosium
  • Samarium
  • imidazole
  • Strontium