Publicación: Gold nanostructure-related non-plasmon resonance absorption band as a fingerprint of ortho-alkyl substituted phenolic compounds
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2021-08-29
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info:eu-repo/semantics/openAccess
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Elsevier
Resumen
A systematic study for correlating the chemical structure of phenolic compounds with their capacity to form gold nanoparticles was carried out. Two groups of phenolic compounds were selected: one group with a substituent with different size at ortho position respect to hydroxyl group (phenol, o-cresol, 2-ethylphenol, 2-iso-propylphenol, 2-tert-butylphenol and 2-methoxyphenol); and the second group consists of phenolic compounds with the same substituent (methyl) at different positions respect to hydroxyl group (o-cresol, m-cresol and p-cresol).
In addition to the characteristic gold nanoparticles (AuNPs) formation band at 550 nm obtained for all the structures of phenolic compounds studied, ortho-alkyl substituted yielded selectively a metastable band at 400 nm, due to gold nanoclusters (AuNCs) formation. We hypothesized that these specific phenolic compounds can temporally stabilize AuNCs with number of Au atoms ranging from 3 to 41.
This new band was proposed for rapid screening of these phenolics with promising results, paving the way to new and more selective colorimetric assay for phenolic compounds determination.
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Categorías UNESCO
Palabras clave
Phenolic compounds, Antioxidants, Gold nanocluster, Gold nanoparticle, Isomer analysis
Citación
Silvia Dortez, Maria Cristina González, Agustín G. Crevillen, Alberto Escarpa, Gold nanostructure-related non-plasmon resonance absorption band as a fingerprint of ortho-alkyl substituted phenolic compounds, Microchemical Journal, Volume 171, 2021, 106788, ISSN 0026-265X, https://doi.org/10.1016/j.microc.2021.106788
Centro
Facultades y escuelas::Facultad de Ciencias
Departamento
Ciencias Analíticas