Optical (DRUV-VIS) and magnetic (EPR) behavior of synthetic melanins

The properties of melanins prepared from L-dopa oxidation by both chemical and electrochemical methods are reported, searching for a material with more intense optical absorption in the visible region. The characterization of the samples have been done by cyclic voltammetry (CV), cronoamperometry (CA), Fourier transformed infrared spectroscopy (FTIR), electron paramagnetic resonance spectroscopy (EPR) and diffuse reflectance ultraviolet-visible spectroscopy (DRUV-VIS) techniques. The electrochemical method enhanced the organic free radical (spin) concentration and the absorption intensity in the visible region of the spectrum. The DRUV-VIS technique along with mathematical tools, such as the Kubelka-Munk remission function, were good options for the characterization of the final products.

Bibliographic Details

Main Authors:	Santos,Júlio César Pereira dos, Marino,Cláudia Eliana Bruno, Mangrich,Antonio Salvio, Rezende,Edivaltrys Inayve Pissinati de
Format:	Digital revista
Language:	English
Published:	ABM, ABC, ABPol 2012
Online Access:	http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392012000200007
Tags:	Add Tag No Tags, Be the first to tag this record!