Superoxide dismutase mimicking Cu(II)�mixed amino acid complexes covalently grafted onto silica gel�an FT-IR study

Csendes, Zita; Bugris, Val�ria; Lack�, Linda; Lab�di, Imre; Kiss, J�nos; P�link�, Istv�n
May 2010
Analytical & Bioanalytical Chemistry;May2010, Vol. 397 Issue 2, p549
Academic Journal
Our recent work concerning the synthesis, characterisation and testing of bioinspired electron transfer catalysts is described in this contribution. The catalysts were various Cu(II) complexes having mixed C- or N-protected amino acids ( l-histidine and l-tyrosine) as ligands covalently grafted onto surface-modified silica gel. The resulting materials were structurally characterised by FT-IR spectroscopy, and their superoxide dismutase activities were tested. The covalently anchored Cu(II) complexes displayed appreciable activities in the test reaction; thus, they may be considered as promising candidates as durable electron transfer catalysts approaching the efficiency of the enzyme mimicked. [Figure not available: see fulltext.]


Related Articles

  • Fe-amino acid complexes immobilized on silica gel as active and highly selective catalysts in cyclohexene epoxidation. Varga, Gábor; Csendes, Zita; Bajnóczi, Éva; Carlson, Stefan; Sipos, Pál; Pálinkó, István // Research on Chemical Intermediates;Dec2015, Vol. 41 Issue 12, p9155 

    In this work, the syntheses, structure, superoxide dismutase (SOD) activity, and the catalytic use in the oxidative transformations of cyclohexene of covalently grafted Fe(III)-complexes formed with various or various combinations of C-protected amino acid ( l-histidine, l-tyrosine, l-cysteine...

  • Preparation, Characterization and Catalytic Activities of Immobilized Enzyme Mimics. Szilágyi, István; Berkesi, Ottó; Sipiczki, Mónika; Korecz, László; Rockenbauer, Antal; Pálinkó, István // Catalysis Letters;Feb2009, Vol. 127 Issue 3/4, p239 

    In order to find highly active and selective oxygen-transfer catalysts with appreciable durability, Cu(II)–histidine complexes were covalently grafted onto a chlorinated polystyrene resin as copper-containing enzyme mimics. The Cu(II)-histidine complexes and the mobile polymer were to...

  • Immobilized Cu (II)—Amino Acid Complexes as Prospective Highly Efficient Catalytic Materials: Synthesis, Structural Characterization and Catalytic Activities. Pálinkó, István; Ordasi, Adrien; Kiss, János T.; Labádi, Imre // AIP Conference Proceedings;11/14/2008, Vol. 1075 Issue 1, p165 

    In this work the covalent anchoring of N-or C-protected Cu(II)—L-tyrosine complexes onto a swellable resin or surface-modified silica gel is described. Experimental conditions (solvents, the availability of ligands) of the synthesis were varied; the structures (by IR spectroscopy) and the...

  • Sorption of Aromatic Amino Acids on Dispersed Silica with Chemically Grafted β-Cyclodextrin. Roik, N. V.; Belyakova, L. A.; Dzyazko, M. A. // Chemistry, Physics & Technology of Surface / Khimiya, Fizyka ta ;Oct2011, Vol. 2 Issue 3, p314 

    Synthesis of β -cyclodextrin-containing silica has been carried out under mild conditions using 1,1′ -carbonyldiimidazole as an coupling agent. Sorption of p-aminobenzoic and p-aminosalicylic acids on silicas with various structure of surface layer has been studied in relation to...

  • Concentration of Anions by Silica Adsorbents with Immobilized Nitrogencontaining Polymers. Tertykh, V. A.; Polishchuk, L. M.; Yanovska, E. S.; Dadashev, A. D. // Adsorption Science & Technology;Feb2008, Vol. 26 Issue 1/2, p59 

    Immobilization of a polyionene complex on a silica gel surface immediately after polymer formation (in situ immobilization) and the covalent anchorage of polyhexamethylene guanidine hydrochloride onto an amino-containing silica surface have been performed. The adsorption properties of the...

  • Grafting Vinyl Monomers onto MWCNT Coupled with Chitosan III:Graft Coploymerization of Methyl Methacrylate onto Chitosan Coupled with Multiwalled Carbon Nano Tube. Sahoo, Umakant; Das, Mira; Chahataray, Rajashree; Nayak, P. L. // Middle East Journal of Scientific Research;2014, Vol. 22 Issue 2, p210 

    In the present paper, the vinyl monomer methyl methaacrylate(MMA) was grafted onto chitosan- MWCNT-COCL. Acid functionalized with multiwalled carbonnanotubes (MWCNT) were covalently grafted to chitosan by first reacting the oxidized carbon nanotubes with thionyl chloride to form acylchlorinated...

  • Preparation of Sulfonate-Grafted Silica/Chitosan-based Proton Exchange Membrane. Putrie, Zarra Miantina; Setyawan, Heru // Advanced Materials Research;2014, Issue 896, p54 

    Sulfonate-grafted silica/chitosan hybrid (SGSC) membrane has been successfully prepared by in-situ sol-gel method. In this method, grafting of sulfonate onto silica surface was carried out along with membrane formation. Silica sol, with the particle size of about 9 nm obtained from sodium...

  • Synthesis and characterization of graft copolymers of mulberry silk fiber with vinyl binary monomers. Sharma, Rajeev Kr.; Kumar, Sunil // Advances in Applied Science Research;2013, Vol. 4 Issue 6, p41 

    Binary monomer mixtures of Acrylamide (AAm) and Vinyl acetate (VAc) with methyl methacrylate (MMA) as the principal monomer were grafted onto Mulberry silk fiber in an aqueous medium by using ceric ammonium nitrate (CAN) as redox initiator. The binary vinyl monomer were graft copolymerized by...

  • Life in the Dead Sea.  // Discover;Aug96, Vol. 17 Issue 8, p19 

    Presents a study on halobacterium found in the Dead Sea. Study of protective proteins among Haloarcula marismortui; Efforts to graft amino-acid sequences of protective proteins onto other salt-intolerant proteins; Industrial applications.


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics