Montmorillonite intercalated Cu(II)-histidine complex - Synthesis, characterisation and superoxide dismutase activity

I. Szilágyi, I. Labádi, K. Hernádi, T. Kiss, I. Pálinkó

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Cu(II)-L-histidine complex was prepared between the layers of montmorillonite by introducing the Cu2+ ions by ion exchange first, then allowing complexation by adding the ligand molecules to the suspension of the host. Structural characterisation was performed by FT-IR and EPR spectroscopies and thermal analysis. Two types of intercalated complex were identified: mainly pentacoordinated complex was formed with the Cu2+ ions coordinating to skeletal oxygens of the host accompanied by small amount of tetracoordinated complex anchored to the host via hydrogen bond through a COO- - skeletal OH interaction. The montmorillonite intercalated complexes displayed superoxide dimutase activity. Although it was lower than that of the host-free complex, the host-guest substance could be easily separated from the reaction mixture and could be used several times without significant loss of activity.

Original languageEnglish
Pages (from-to)1011-1018
Number of pages8
JournalStudies in Surface Science and Catalysis
Volume158 B
Publication statusPublished - 2005

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Bentonite
histidine
inorganic peroxides
montmorillonite
Clay minerals
Histidine
Superoxide Dismutase
Ions
synthesis
Complexation
Superoxides
Thermoanalysis
Paramagnetic resonance
Ion exchange
Suspensions
Hydrogen bonds
ions
Ligands
Spectroscopy
Oxygen

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Catalysis

Cite this

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abstract = "Cu(II)-L-histidine complex was prepared between the layers of montmorillonite by introducing the Cu2+ ions by ion exchange first, then allowing complexation by adding the ligand molecules to the suspension of the host. Structural characterisation was performed by FT-IR and EPR spectroscopies and thermal analysis. Two types of intercalated complex were identified: mainly pentacoordinated complex was formed with the Cu2+ ions coordinating to skeletal oxygens of the host accompanied by small amount of tetracoordinated complex anchored to the host via hydrogen bond through a COO- - skeletal OH interaction. The montmorillonite intercalated complexes displayed superoxide dimutase activity. Although it was lower than that of the host-free complex, the host-guest substance could be easily separated from the reaction mixture and could be used several times without significant loss of activity.",
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T1 - Montmorillonite intercalated Cu(II)-histidine complex - Synthesis, characterisation and superoxide dismutase activity

AU - Szilágyi, I.

AU - Labádi, I.

AU - Hernádi, K.

AU - Kiss, T.

AU - Pálinkó, I.

PY - 2005

Y1 - 2005

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AB - Cu(II)-L-histidine complex was prepared between the layers of montmorillonite by introducing the Cu2+ ions by ion exchange first, then allowing complexation by adding the ligand molecules to the suspension of the host. Structural characterisation was performed by FT-IR and EPR spectroscopies and thermal analysis. Two types of intercalated complex were identified: mainly pentacoordinated complex was formed with the Cu2+ ions coordinating to skeletal oxygens of the host accompanied by small amount of tetracoordinated complex anchored to the host via hydrogen bond through a COO- - skeletal OH interaction. The montmorillonite intercalated complexes displayed superoxide dimutase activity. Although it was lower than that of the host-free complex, the host-guest substance could be easily separated from the reaction mixture and could be used several times without significant loss of activity.

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