Structural evolution and magnetic properties of a series of coordination polymers featuring dinuclear secondary-building units and adamantane- dicarboxylato ligands

Yan Zhen Zheng, Zhiping Zheng, Ming Liang Tong, Xiao Ming Chen

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

A series of coordination polymers, [Cu2(1,3-adc) 2(H2O)2] (1), [Cu2(1,3-ada) 2(H2O)2] (2), [M2(1,3-ada) 2(4,4′-bpy)] M = Cu (3), Co (4), [Ni2(1,3-ada) 2(4,4′-bpy)2] (5), [Mn2(1,3-ada) 2(4,4′-bpy)2](1,3-adaH2)(H 2O)0.5 (6), and [Ni2(1,3-adc) 2(4,4′-bpy)] (7) (1,3-adcH2 = 1,3- adamantanedicarboxylic acid, 1,3-adaH2 = 1,3-adamantanediacetic acid, 4,4′-bpy = 4,4′-bipyridine) were synthesized under hydrothermal conditions. Single-crystal X-ray diffraction studies revealed that a majority of these complexes feature a laminated structure based on the cross-linking of dinuclear metal units and organic connectors. Both compounds 1 and 2 feature a CuII2 paddle-wheel secondary-building unit that can be linked by the rigid 1,3-adc or flexible 1,3-ada, forming a linear chain structure in 1 and a rhomboidal net structure in 2. Substituting the apical aqua ligands of 2 for 4,4′-bpy afforded a (4,4) square layer of 3. Replacing CuII for CoII yielded isostructural compound 4. The uses of NiII and MnII ions in the synthesis of compounds 5 and 6 significantly altered the rhomboidal layer into a different kind of layered structure that features double-helix metal-dicarboxylate chains circumambulating the central 4,4′-bpy pillar. On the other hand, the use of rigid 1,3-adc in replacement of 1,3-ada led to the formation of the 2-fold interpenetrated layer of 7. Magnetic measurements indicated that there exist weak antiferromagnetic interactions in the dinuclear units of compound 5.

Original languageEnglish (US)
Pages (from-to)1159-1168
Number of pages10
JournalPolyhedron
Volume52
DOIs
StatePublished - Mar 22 2013

    Fingerprint

Keywords

  • Adamantane dicarboxylate
  • Coordination polymer
  • Dinuclear
  • Magnetic property

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

Cite this