Polymeric ligands, such as 2-substituted pentanedioic acid (2), 2-substituted propanoic acid (3), and deoxylactit-1-yl (4) derivatives of chitosan (1), were used to prepare copper complexes that are widely soluble in aqueous solution. EPR results (100 K) show that all association complexes basically have a tetragonal symmetry. Visible CD spectra suggest, however, that the order of increasing departure from this geometry is Cu-(1) approximately Cu-(3) less than Cu-(2) less than or equal to Cu-(4), the lack of sterically constraining side-chains in (1) and (3) allowing a more symmetric arrangement of ligands around the central metal ion. Results on the catalytic activity of the association complexes for air oxidation of catechol derivatives are also presented.

Chiessi, E., Paradossi, G., Venanzi, M., & Pispisa, B. (1992). Copper Complexes Immobilized to Chitosan. JOURNAL OF INORGANIC BIOCHEMISTRY, 46, 109-118.

Copper Complexes Immobilized to Chitosan

CHIESSI, ESTER;PARADOSSI, GAIO;VENANZI, MARIANO;PISPISA, BASILIO
1992

Abstract

Polymeric ligands, such as 2-substituted pentanedioic acid (2), 2-substituted propanoic acid (3), and deoxylactit-1-yl (4) derivatives of chitosan (1), were used to prepare copper complexes that are widely soluble in aqueous solution. EPR results (100 K) show that all association complexes basically have a tetragonal symmetry. Visible CD spectra suggest, however, that the order of increasing departure from this geometry is Cu-(1) approximately Cu-(3) less than Cu-(2) less than or equal to Cu-(4), the lack of sterically constraining side-chains in (1) and (3) allowing a more symmetric arrangement of ligands around the central metal ion. Results on the catalytic activity of the association complexes for air oxidation of catechol derivatives are also presented.
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore CHIM/02 - Chimica Fisica
English
Con Impact Factor ISI
Chiessi, E., Paradossi, G., Venanzi, M., & Pispisa, B. (1992). Copper Complexes Immobilized to Chitosan. JOURNAL OF INORGANIC BIOCHEMISTRY, 46, 109-118.
Chiessi, E; Paradossi, G; Venanzi, M; Pispisa, B
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2108/114548
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