Fundamental building blocks of eumelanins: electronic properties of indolequinone-dimers

Details Fundamental building blocks of eumelanins: electronic properties of indolequinone-dimers Fundamental building blocks of eumelanins: electronic properties of indolequinone-dimers

2003-01-18

arxiv.org/abs/physics/0301042v1

Physics

Biological Physics

11 pages, 7 figures

Scientific paper

10.1016/S0009-2614(03)00629-8

We present results from the theoretical INDO calculations of the electronic structure for stacked eumelanins' monomers. As basic indolic components of the eumelanin structure 5,6-dihydroxyindole (DHI or HQ) and its oxidized forms (SQ and IQ) were chosen. The results reveal dependency of electronic properties of such aggregates on monomers' redox states. They point out also a tendency to localize an extra charge on one of dimer's subunits that could be suggestive of an electron hopping as a model mechanism forthe electron transfer in eumelanins.

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