Figure 5: Generation of chromophores from DHI and DHICA dimers in the presence of 1% PVA. From: Eumelanin broadband absorption develops from aggregation-modulated chromophore interactions under structural and redox control The oxidant concentration was based on a two-electron oxidation stoichiometry ...
Absorption spectraPlane-wave density functional theoryIn this work, we study the optical absorption spectra of extensive stacking forms of four molecules known to be among eumelanin basic building blocks: 5,6-dihydroxyindole (DHI), 5,6-dihydroxyindole-2-carboxylic acid (DHICA), indolequinone (IQ...
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In this work, we study the optical absorption spectra of extensive stacking forms of four molecules known to be among eumelanin basic building blocks: 5,6-dihydroxyindole (DHI), 5,6-dihydroxyindole-2-carboxylic acid (DHICA), indolequinone (IQ) and quinone-methide (MQ). Stacked monomers can...