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.

Fluorescence spectroscopy of synthetic melanin in solution

PERNA, GIUSEPPE;FRASSANITO, MARIA CRISTINA;GALLONE, ANNA;CAPOZZI, VITO GIACOMO
2009

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.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11369/15227
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