Wereportadetailedinvestigationoffluorescencepropertiesofsyntheticeumelaninpigmentin solution.Acompletesetoffluorescencespectrainthenear-UVandvisiblerangeisanalysed.Excitation spectraatafewselectedemissionenergiesarealsoinvestigated.Ourmeasurementssupportthe hypothesisthatfluorescenceineumelaninisrelatedtochemicallydistinctoligomericunitsthatcanbe selectivelyexcited.Fluorescenceduetolargeoligomersystemsisspectrallydifferentiatedfromthatdue to monomersandsmalloligomersystems.Fluorescenceexcitationmeasurementsshowthe contributionof5,6-dihydroxyndole-2-carboxylicacidand5,6-dihydroxyndolemonomerstothe emissionofsmall-sizeoligomers. & 2008ElsevierB.V.Allrightsreserved.
Titolo: | Fluorescence spectroscopy of synthetic melanin in solution |
Autori: | |
Data di pubblicazione: | 2009 |
Rivista: | |
Abstract: | Wereportadetailedinvestigationoffluorescencepropertiesofsyntheticeumelaninpigmentin solution.Acompletesetoffluorescencespectrainthenear-UVandvisiblerangeisanalysed.Excitation spectraatafewselectedemissionenergiesarealsoinvestigated.Ourmeasurementssupportthe hypothesisthatfluorescenceineumelaninisrelatedtochemicallydistinctoligomericunitsthatcanbe selectivelyexcited.Fluorescenceduetolargeoligomersystemsisspectrallydifferentiatedfromthatdue to monomersandsmalloligomersystems.Fluorescenceexcitationmeasurementsshowthe contributionof5,6-dihydroxyndole-2-carboxylicacidand5,6-dihydroxyndolemonomerstothe emissionofsmall-sizeoligomers. & 2008ElsevierB.V.Allrightsreserved. |
Handle: | http://hdl.handle.net/11369/15227 |
Appare nelle tipologie: | 1.1 Articolo in rivista |