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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Identification of Common Resonant Lines in the EPR Spectra of Melanins

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Paulin, Joao V. [1] ; Batagin-Neto, Augusto [1, 2] ; Graeff, Carlos F. O. [1, 3]
Total Authors: 3
[1] Sao Paulo State Univ UNESP, Sch Sci, Postgrad Program Mat Sci & Technol POSMAT, BR-17033360 Bauru - Brazil
[2] Sao Paulo State Univ UNESP, Campus Itapeva, BR-18409010 Itapeva - Brazil
[3] Sao Paulo State Univ UNESP, Sch Sci, Dept Phys, BR-17033360 Bauru - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Journal of Physical Chemistry B; v. 123, n. 6, p. 1248-1255, FEB 14 2019.
Web of Science Citations: 1

Melanins are natural pigments with promising bioelectronic applications. Among their unique properties, the existence of a persistent paramagnetic signal can be considered one of the most intriguing and controversial features. Additionally, the possible influence of such centers on charge transport accentuates the need for a better understanding of their origin and specific characteristics. In this report, electron paramagnetic resonance spectra of melanin samples obtained at different experimental conditions were systematically studied. From the fitting procedure, three distinct resonant lines are proposed, two associated with carbon-centered radicals and one with semiquinone free radicals. (AU)

FAPESP's process: 15/23000-1 - Vertical organic field-effect transistor using dyes of natural origin as active layer
Grantee:João Vitor Paulin
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
Grantee:Elson Longo da Silva
Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC
FAPESP's process: 12/03116-7 - Simulation of electronic and optical properties of organic materials
Grantee:Augusto Batagin Neto
Support type: Scholarships in Brazil - Doctorate