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Decoding eumelanin's spin label signature: a comprehensive EPR analysis

João V. Paulin Orcid Logo, Carlos F. O. Graeff Orcid Logo, Bernard Mostert Orcid Logo

Materials Advances, Volume: 5, Issue: 4, Pages: 1395 - 1419

Swansea University Author: Bernard Mostert Orcid Logo

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DOI (Published version): 10.1039/d3ma01029e

Abstract

Eumelanin is a black-brown natural pigment found throughout nature. As a material class, it possesses unique physical and chemical properties that entice much attention from chemists, physicists, and material scientists due to its potential use in medical and sustainable organic (bio)electronics set...

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Published in: Materials Advances
ISSN: 2633-5409
Published: Royal Society of Chemistry (RSC) 2024
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URI: https://cronfa.swan.ac.uk/Record/cronfa67142
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Abstract: Eumelanin is a black-brown natural pigment found throughout nature. As a material class, it possesses unique physical and chemical properties that entice much attention from chemists, physicists, and material scientists due to its potential use in medical and sustainable organic (bio)electronics settings. To harness its potential, accurate spectroscopical characterization is a primary requirement for the efficient engineering of eumelanin-based electronic devices. A key spectroscopic technique is electron paramagnetic resonance (EPR) since the persistent paramagnetism of eumelanin is a spin-label signature of its molecular state. This review provides a comprehensive discussion on the origin of eumelanin paramagnetism through a multifrequency EPR approach and highlights the current multi-species point-of-view.
Keywords: Eumelanin, pigment
College: Faculty of Science and Engineering
Issue: 4
Start Page: 1395
End Page: 1419