Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12779/6084
Title: Influence of pH on the speciation of copper(II) in reactions with the green tea polyphenols, epigallocatechin gallate and gallic acid
Authors: Pirker, K. F.
Baratto, Maria Camilla 
Basosi, Riccardo 
Goodman, B. A.
Keywords: copper polyphenol complex; EPR spectroscopy; X-band; S-band; line shape analysis; rotational correlation time
Issue Date: 2012
Project: None 
Journal: JOURNAL OF INORGANIC BIOCHEMISTRY
Abstract: 
Changes in speciation of copper(II) in reactions with epigallocatechin gallate (EGCG) and gallic acid (GA) as a function of pH have been investigated by multifrequency (X and S-band) EPR spectroscopy in the fluid and frozen states. The EPR spectra show the formation of three distinct mononuclear species with each of the polyphenols, and these are interpreted in terms of one mono- and two bis-complexes. However, di- or polymeric complexes dominate the Cu(II) speciation in the pH range 4-8, and it is only at alkaline pH values that these mononuclear complexes make appreciable contributions to the metal speciation.
Description: 
40813
URI: http://hdl.handle.net/20.500.12779/6084
ISSN: 0162-0134
DOI: 10.1016/j.jinorgbio.2011.12.010
Appears in Collections:Publications

Show full item record

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.