High-field/high-frequency EPR spectroscopy on synthetic melanin: On the origin of carbon-centered radicals

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorHelmholtz-Zentrum Berlin für Materialien und Energie GmbH-
Autor(es): dc.contributorFreie Universität Berlin-
Autor(es): dc.contributorUniversity of Utah-
Autor(es): dc.creatorPaulin, J. V.-
Autor(es): dc.creatorBatagin-Neto, A.-
Autor(es): dc.creatorNaydenov, B.-
Autor(es): dc.creatorLips, K.-
Autor(es): dc.creatorGraeff, C. F.O.-
Data de aceite: dc.date.accessioned2025-08-21T23:34:35Z-
Data de disponibilização: dc.date.available2025-08-21T23:34:35Z-
Data de envio: dc.date.issued2022-04-29-
Data de envio: dc.date.issued2022-04-29-
Data de envio: dc.date.issued2021-10-07-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1039/d1ma00446h-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/229669-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/229669-
Descrição: dc.descriptionAmong all the pigments found in nature, melanin has drawn considerable attention for bioelectronics applications as it contains a set of physicochemical properties such as antioxidant activity, metal chelation, biocompatibility, broad-band absorbance throughout the UV-visible region, hydration-dependent conductivity and intrinsic and extrinsic free radical character. A better understanding of these properties is a matter of significant importance to improve melanin-based organic devices efficiently. Therefore, the origin of melanin free-radicals was studied using continuous-wave electron paramagnetic resonance (EPR) spectroscopy at 263 GHz for standard non-functionalized and sulfonated derivatives. Our results indicated that more than one radical species should be evoked to study the free-radical nature of standard and sulfonated melanin. Additionally, we also confirm that the free-radical system of sulfonated melanin is similar to non-functionalized melanin. Based on the g-anisotropy analysis, we propose which potential units could be responsible for carbon-centered radicals. This journal is-
Descrição: dc.descriptionSão Paulo State University (UNESP) School of Sciences Postgraduate Program in Science and Technology of Materials (POSMAT)-
Descrição: dc.descriptionSão Paulo State University (UNESP) Campus of Itapeva-
Descrição: dc.descriptionHelmholtz-Zentrum Berlin für Materialien und Energie GmbH-
Descrição: dc.descriptionFreie Universität Berlin Department Physics-
Descrição: dc.descriptionUniversity of Utah Department of Physics and Astronomy-
Descrição: dc.descriptionSão Paulo State University (UNESP) School of Sciences Department of Physics-
Descrição: dc.descriptionSão Paulo State University (UNESP) School of Sciences Postgraduate Program in Science and Technology of Materials (POSMAT)-
Descrição: dc.descriptionSão Paulo State University (UNESP) Campus of Itapeva-
Descrição: dc.descriptionSão Paulo State University (UNESP) School of Sciences Department of Physics-
Formato: dc.format6297-6305-
Idioma: dc.languageen-
Relação: dc.relationMaterials Advances-
???dc.source???: dc.sourceScopus-
Título: dc.titleHigh-field/high-frequency EPR spectroscopy on synthetic melanin: On the origin of carbon-centered radicals-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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