Towards structure–property–function relationships for eumelanin

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Towards Structure-Property-Function Relationships for Eumelanin

*Soft Condensed Matter Physics Group, University of Queensland Department of Physics, St. Lucia Campus, Brisbane, QLD 4072, Australia Theory of Condensed Matter Physics Group, University of Queensland Department of Physics St. Lucia Campus, Brisbane, QLD 4072, Australia Center for Computational Materials Science, Naval Research Laboratory, Washington, D.C. 20375, USA Lawrence Berkeley National ...

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The presence of melanin in spleens of black C57BL/6 mice has been known for long. Although its origin and biological functions are still obscure, the relation of splenic melanin to the hair follicle and skin pigmentation was suggested. Here, we demonstrated using for the first time electron paramagnetic resonance spectroscopy that black-spotted C57BL/6 spleens contain eumelanin. Its presence he...

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Structural model of eumelanin.

Melanin is a ubiquitous pigment in living organisms with multiple important functions, yet its structure is not well understood. We propose a structural model for eumelanin protomolecules, consisting of 4 or 5 of the basic molecular units (hydroquinone, indolequinone, and its tautomers), in arrangements that contain an inner porphyrin ring. We use time-dependent density functional theory to cal...

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Transition dipole strength of eumelanin.

We report the transition dipole strength of eumelanin (the principal human photoprotective pigment) in the ultraviolet and visible. We have used both theoretical (density functional) and experimental methods to show that eumelanin is not an unusually strong absorber amongst organic chromophores. This is somewhat surprising given its role as a photoprotectant, and suggests that the dark coloring...

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Photovoltaic properties of PSi impregnated with eumelanin

A bulk heterojunction of porous silicon and eumelanin, where the columnar pores of porous silicon are filled with eumelanin, is proposed as a new organic-inorganic hybrid material for photovoltaic applications. The addition of eumelanin, whose absorption in the near infrared region is significantly higher than porous silicon, should greatly enhance the light absorption capabilities of the empty...

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ژورنال

عنوان ژورنال: Soft Matter

سال: 2006

ISSN: 1744-683X,1744-6848

DOI: 10.1039/b511922g