Biocatalytic Activity of Polyethylene Imine Hydrogel Complexes with Transition Metal Ions

2005 ◽  
Vol 897 ◽  
Author(s):  
Gulnara Bektenova ◽  
Nurzhan Chinibayeva ◽  
Essen Bekturov
Keyword(s):  
Hydrogen Peroxide ◽  
Catalase Activity ◽  
Ferrous Iron ◽  
Ferric Iron ◽  
Transition Metal Ions ◽  
Ternary Complexes ◽  
Hydrogen Peroxide Decomposition ◽  
Polyethylene Imine ◽  
Peroxide Decomposition ◽  
Complex Salts

AbstractPolyethylene imine hydrogel complexes with various salts of ferric and ferrous iron and also with complex salts of iron as well as insoluble ternary complexes of various composition: low cross-linked polyethylene imine hydrogel - copper (II) nitrate - sodium dodecylbenzylsulfate have been received. Their biocatalytic properties in the reaction of hydrogen peroxide decomposition (catalase activity) have been investigated. It was shown that catalase activity of complexes depends on the salts type and valence state of iron ions. The complexes of ferric iron as well as ternary complexes are most active in the reaction of hydrogen peroxide decomposition.

scholarly journals Mimicking catalase and catecholase enzymes by copper(II)-containing complexes

2006 ◽  
Vol 4 (1) ◽  
pp. 118-134 ◽  
Author(s):  
István Szilágyi ◽  
László. Horváth ◽  
Imre Labádi ◽  
Klara Hernadi ◽  
István Pálinkó ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Ion Exchange ◽  
Silica Gel ◽  
Catalase Activity ◽  
Thermal Characteristics ◽  
Hydrogen Peroxide Decomposition ◽  
Covalent Bonds ◽  
Peroxide Decomposition ◽  
Catecholase Activity ◽  
Ft Ir

AbstractAn imidazolate-bridged copper(II)-zinc(II) complex (Cu(II)-diethylenetriamino-μ-imidazolato-Zn(II)-tris(2-aminoethyl)amine perchlorate (denoted as “Cu,Zn complex”) and a simple copper(II) complex (Cu(II)-tris(2-aminoethyl) amine chloride (“Cu-tren”) were prepared and immobilised on silica gel (by hydrogen or covalent bonds) and montmorillonite (by ion exchange). The immobilised substances were characterised by FT-IR spectroscopy and their thermal characteristics were also studied. The obtained materials were tested in two probe reactions: catalytic oxidation of 3,5-di-tert-butyl catechol (DTBC) (catecholase activity) and the decomposition of hydrogen peroxide (catalase activity). It was found that the catecholase activity of the Cu,Zn complex increased considerably upon immobilization on silica gel via hydrogen bonds and intercalation by ion exchange among the layers of montmorillonite. The imidazolate-bridged copper(II)-zinc(II) complex and its immobilised versions were inactive in hydrogen peroxide decomposition. The Cu(II)-tris(2-aminoethyl)amine chloride complex displayed good catalase activity; however, immobilisation could not improve it.

Aggregated Pt–Pd nanoparticles on Nafion membrane for impulsive decomposition of hydrogen peroxide

RSC Advances ◽  
2015 ◽  
Vol 5 (57) ◽  
pp. 46295-46300 ◽  
Author(s):  
Mohammad A. Hasnat ◽  
Mohammed M. Rahman ◽  
Iqbal A. Siddiquey ◽  
S. M. Borhanuddin ◽  
M. Saiful Alam ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Pd Nanoparticles ◽  
Decomposition Process ◽  
Nafion Membrane ◽  
Hydrogen Peroxide Decomposition ◽  
Peroxide Decomposition

A Pd site initiates hydrogen peroxide decomposition by adsorbing one ‘O’ followed by splitting of O–H bond. Meanwhile, a Pt site finally completes the decomposition process by enabling desorption of the incipient O2 species.

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