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• W2024763442 startingPage "13985" @default.
• W2024763442 abstract "We report a detailed photoluminescence study of cysteinyldopa-melanin (CDM), the synthetic analogue of pheomelanin. Emission spectra are shown to be a far more sensitive probe of CDM's spectroscopic behavior than are absorption spectra. Although CDM and dopa-melanin (DM, the synthetic analogue of eumelanin) have very similar absorption spectra, we find that they have very different excitation and emission characteristics; CDM has two distinct photoluminescence peaks that do not shift with excitation wavelength. Additionally, our data suggest that the radiative quantum yield of CDM is excitation energy dependent, an unusual property among biomolecules that is indicative of a chemically disordered system. Finally, we find that the radiative quantum yield for CDM is ∼0.2%, twice that of DM, although still extremely low. This means that 99.8% of the energy absorbed by CDM is dissipated via nonradiative pathways, consistent with its role as a pigmentary photoprotectant." @default.
• W2024763442 created "2016-06-24" @default.
• W2024763442 creator A5055790390 @default.
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• W2024763442 date "2006-06-27" @default.
• W2024763442 modified "2023-09-23" @default.
• W2024763442 title "Radiative Relaxation in Synthetic Pheomelanin" @default.
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• W2024763442 doi "https://doi.org/10.1021/jp054869l" @default.
• W2024763442 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/16836351" @default.
• W2024763442 hasPublicationYear "2006" @default.
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