An imidazolate- and azide-bridged copper(II) coordination polymer consisting of alternating di- and mononuclear units

Ken Ichi Sakai, Tomoyuki Akutagawa, Takayoshi Nakamura

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Using the CuII-imidazole(Him) complex [Cu(Him)4Cl]Cl as the starting material, the imidazolate (im)- and azide-bridged Cu II coordination polymer [Cu3(Him)4(im) 2(N3)4]n was successfully obtained. Single-crystal X-ray analysis revealed that it possesses an im-bridged linear-chain structure consisting of alternating dinuclear units with a symmetric end-on azide-bridged [Cu(Iμ1,1-N3) 2Cu]2+ core and mononuclear units. All of the Cu ions adopt a square pyramidal geometry with an azide at the Jahn-Teller elongated apical position. Some of the azides act as end-to-end interchain bridging ligands from the mononuclear unit to the nearest neighbouring dinuclear unit of the adjacent chain forming a two-dimensional network. Temperature-variable magnetic susceptibility measurements showed that it exhibits one-dimensional ferrimagnetic-like behaviour, which can be ascribed to two types of exchange couplings with opposite signs, namely a weak ferromagnetic coupling through the end-on azide bridges within the dinuclear units and a stronger antiferromagnetic coupling through the im bridges between the di- and the mononuclear units. The novel copper(II) coordination polymer [Cu3(Him)4(im) 2(N3)4]n is constructed with a combination of simple inorganic and organic bridging ligands, namely azide and imidazolate. It shows ferrimagnetic-like behaviour resulting from the coexistence of copper(II) di- and mononuclear units.

Original languageEnglish
Pages (from-to)116-120
Number of pages5
JournalEuropean Journal of Inorganic Chemistry
Issue number1
DOIs
Publication statusPublished - 2011 Jan

Keywords

  • Azides
  • Coordination polymers
  • Copper
  • Magnetic properties
  • N ligands

ASJC Scopus subject areas

  • Inorganic Chemistry

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