Heteronuclear M(II)-Ln(III) (M = Co, Mn; Ln = La, Pr, Sm, Gd, Dy and Er) coordination polymers: Synthesis, structures and magnetic properties

Yanmei Chen, Shixiong She, Lina Zheng, Bin Hu, Wenqian Chen, Bin Xu, Zhou Chen, Fengying Zhou, Yahong Li

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

Thirteen novel 3d-4f heteronuclear coordination polymers based on the pyridine-2,6-dicarboxylic acid (H2pda) and imidazole ligands, HIm[(pda)3MLn(Im)2(H2O)2] ·3H2O (Im = imidazole; M = Co, Ln = Pr (1), Gd (2), Dy (3), Er (4); M = Mn, Ln = Pr (5), Sm (6), Gd (7), Dy (8), Er (9)), HIm[(pda) 3CoSm(Im)2(H2O)2]·2H 2O (10), [(Im)4M(H2O)2][(pda) 4La2(H2O)2]·2H2O (M = Co (11), Mn (12)), and [(pda)6Co3Pr 2(H2O)6]·6H2O (13), have been prepared and structurally characterized. X-ray crystallographic analyses revealed that these complexes display four different types of structures. Complexes 1-9 are isostructural, and possess 1-D chain structures constructed by alternately arrayed nine-coordinated Ln(III) (Ln = Pr, Sm, Gd, Dy, Er) and six-coordinated M(II) (M = Mn, Co) ions. Complex 10 exhibits a unique one-dimensional structure, in which two independent chains are parallel viewed down the a-axis and anti-parallel viewed down the c-axis. Complexes 11 and 12 are isostructural and display 1-D homometallic chain structures. Complex 13 is a 3D framework fabricated through PrN3O6 and CoO 6 polyhedrons as building blocks. The variable-temperature solid-state dc magnetic susceptibilities of complexes 2, 3, 4, 9 and 13 have been investigated. Antiferromagnetic exchange interactions were determined for these five complexes.

Original languageEnglish
Pages (from-to)3010-3016
Number of pages7
JournalPolyhedron
Volume30
Issue number18
DOIs
Publication statusPublished - 2011 Nov 28

Keywords

  • 3d-4f Heteronuclear
  • Imidazole
  • Magnetic properties
  • Pyridine-2,6-dicarboxylic acid

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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