Amino acids and their Cu complexes covalently grafted onto a polystyrene resin – A vibrational spectroscopic study

Korbély, Barbara; Kiss, János; Hernádi, Klára; Pálinkó, István

doi:10.1016/j.molstruc.2006.09.028

Cited by 4 publications

(2 citation statements)

References 3 publications

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“…82,83 In particular, the use of in situ vibrational spectroscopic techniques showed that amino acid complexes that were covalently anchored to polymeric supports displayed a greater stability, with retention of higher activities, for electron transfer reactions. 85,86 The merits of immobilising single-site homogeneous catalysts has paved the way for exploring the interface, as well as combining the advantages of homogeneous as well as heterogeneous catalysts, for potential industrial exploitation. [89][90][91] Heterogeneous Fe 3+ -proline complexes, prepared by the zeolite-synthesis and flexible ligand methods (described earlier) have shown 65 promising potential in the oxidation of cyclohexane and benzyl alcohol (Scheme 1).…”

Section: Encapsulation Strategies Encompassing Channels and Cages In ...mentioning

confidence: 99%

Design strategies for engineering selectivity in bio-inspired heterogeneous catalysts

Xuereb

Raja

2011

Catal. Sci. Technol.

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In an era where the requirement for greener chemical processes is so exigent, the growing need for developing novel routes to environmentally benign and sustainable catalytic procedures is highly desirable. Heterogenising bio-inspired transition-metal complexes on a diverse range of porous supports provides a viable alternative for achieving some of these goals, particularly in terms of reducing waste and by increasing efficiency and selectivity in industrially significant catalytic processes. Choosing an appropriate spatial-restricting support is vital for facilitating enhancements in rate and stereoselectivity, as this plays a pivotal role in optimising the orientation of desired transition-states through varying confinement effects, by utilising a myriad of pore-window apertures for regulating diffusion of organic molecules. The nature of the active site can also be further attuned by adopting an appropriate encapsulation strategy, which could eventually assist in maximising the hydrophilic/hydrophobic character of the support. The nature of the active site and its involvement in the catalytic process can be characterised by using a wide-range of physico-chemcial spectroscopic techniques, which provide valuable insights for drawing mechanistic relationships, which in turn facilitates structure-property correlations.

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Section: Encapsulation Strategies Encompassing Channels and Cages In ...mentioning

confidence: 99%

Design strategies for engineering selectivity in bio-inspired heterogeneous catalysts

Xuereb

Raja

2011

Catal. Sci. Technol.

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“…In another approach, amino acids were immobilized on a chloropropyl-functionalised silica 33 or polystyrene support. 34 The amino acids were either protected on the N-terminal or on the C-terminal and covalently anchored to the chloropropyl moiety on the surface. The immobilised amino acids were then brought in contact with a Cu 2+ salt and complexes were spontaneously formed.…”

Section: Introductionmentioning

confidence: 99%

The characterisation and catalytic properties of biomimetic metal–peptide complexes immobilised on mesoporous silica

Pirngruber

Frunz

Lüchinger

2009

Phys. Chem. Chem. Phys.

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The active core of the enzyme methane mono-oxygenase (MMO) contains an iron (or copper) dimer with histidine and glutamic acid ligands located on a His-x-x-Glu sequence of the peptide chain. We mimicked the active core of MMO by immobilising the His-Gly-Gly-Glu motif on a silica support, using the methods of solid phase peptide synthesis, and by allowing complexes with Cu and Fe cations to self-assemble. The dominating mode of coordination in the complexes was elucidated by a group fitting analysis of the extended X-ray absorption fine structure (EXAFS) spectra. The complexation of the metal cations by the short peptide significantly changed (improved) their catalytic properties in the oxidation of cyclohexane by H(2)O(2) or by 3-chloro-perbenzoic acid.

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Superoxide dismutase inspired Fe(III)−amino acid complexes covalently grafted onto chloropropylated silica gel – Syntheses, structural characterisation and catalytic activity

Csendes

Dudás

Varga

et al. 2013

Journal of Molecular Structure

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Amino acids and their Cu complexes covalently grafted onto a polystyrene resin – A vibrational spectroscopic study

Cited by 4 publications

References 3 publications

Design strategies for engineering selectivity in bio-inspired heterogeneous catalysts

Design strategies for engineering selectivity in bio-inspired heterogeneous catalysts

The characterisation and catalytic properties of biomimetic metal–peptide complexes immobilised on mesoporous silica

Superoxide dismutase inspired Fe(III)−amino acid complexes covalently grafted onto chloropropylated silica gel – Syntheses, structural characterisation and catalytic activity

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