Oligonuclear copper complexes of a bioinspired pyrazolate-bridging ligand: Synthesis, structures, and equilibria in solution

Angelina Prokofieva, Alexander I. Prikhod'ko, E. Enyedy, E. Farkas, Walter Maringgele, Serhiy Demeshko, Sebastian Dechert, Franc Meyer

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

The synthesis of a new bioinspired dinucleating ligand scaffold based on a bridging pyrazolate with appended bis[2-(1-methylimidazolyl)methyl]aminomethyl chelate arms is reported. This ligand forms very stable copper complexes, and a series of different species is present in solution depending on the pH. Interconversions between these solution species are tracked and characterized spectroscopically, and X-ray crystallographic structures of three distinct complexes that correspond to the species present in solution from acidic to basic pH have been determined. Overall, this provides a comprehensive picture of the copper coordination chemistry of the new ligand system. Alterations in the protonation state are accompanied by changes in nuclearity and pyrazolate binding, which cause pronounced changes in color and magnetic properties. Antiferromagnetic coupling between the copper-(II) ions is switched on or off depending on the pyrazole binding mode.

Original languageEnglish
Pages (from-to)4298-4307
Number of pages10
JournalInorganic Chemistry
Volume46
Issue number10
DOIs
Publication statusPublished - May 14 2007

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Copper
Ligands
copper
ligands
synthesis
Protonation
chelates
Scaffolds
Magnetic properties
Ions
chemistry
magnetic properties
Color
color
X rays
causes
ions
x rays
pyrazole

ASJC Scopus subject areas

  • Inorganic Chemistry

Cite this

Oligonuclear copper complexes of a bioinspired pyrazolate-bridging ligand : Synthesis, structures, and equilibria in solution. / Prokofieva, Angelina; Prikhod'ko, Alexander I.; Enyedy, E.; Farkas, E.; Maringgele, Walter; Demeshko, Serhiy; Dechert, Sebastian; Meyer, Franc.

In: Inorganic Chemistry, Vol. 46, No. 10, 14.05.2007, p. 4298-4307.

Research output: Contribution to journalArticle

Prokofieva, Angelina ; Prikhod'ko, Alexander I. ; Enyedy, E. ; Farkas, E. ; Maringgele, Walter ; Demeshko, Serhiy ; Dechert, Sebastian ; Meyer, Franc. / Oligonuclear copper complexes of a bioinspired pyrazolate-bridging ligand : Synthesis, structures, and equilibria in solution. In: Inorganic Chemistry. 2007 ; Vol. 46, No. 10. pp. 4298-4307.
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