2024-03-29T07:27:08Zhttps://repositori.uji.es/oai/requestoai:repositori.uji.es:10234/1828102023-09-26T12:49:50Zcom_10234_7053com_10234_9col_10234_8639
Repositori UJI
author
Felip-León, Carles
author
Puche, Marta
author
Miravet, Juan
author
Galindo, Francisco
author
Feliz, Marta
2019-06-13T09:55:42Z
2019-06-13T09:55:42Z
2019
FELIP-LEÓN, Carles, et al. A spectroscopic study to assess the photogeneration of singlet oxygen by graphene oxide. Materials Letters, 2019, vol. 251, p. 45-51.
0167-577X1873-4979
http://hdl.handle.net/10234/182810
https://doi.org/10.1016/j.matlet.2019.05.001
The photogeneration of singlet oxygen (1
O2) during short irradiation times of graphene oxide (GO) is
assessed under visible light with soft irradiation conditions either directly monitoring the phosphorescence emission of 1
O2 at ca. 1275 nm, or indirectly by means of the fluorescent probe 9,10-anthracene
diyl-bis(methylene)dimalonic acid (ABDA). Results obtained using both methodologies lead to the conclusion that 1
O2 generation is negligible under our experimental conditions. In the case of using ABDA
very small emission changes were recorded, which could be attributed to other side reactions. Special
care should be taken when using this spectroscopic probe to assess the generation of 1
O2, since ABDA
and related probes based on the reactivity of the anthracene fluorophore can also detect electron transfer
processes. This kind of approaches have been less explored in the field of Materials Science at the nanoscale, and we believe that the knowledge on the lack of generation of 1
O2 by irradiated GO is informative
and useful, especially for the assessment of the environmental and biological toxicity of nanomaterials
based on GO.
eng
0167-577X/© 2019 Elsevier B.V. All rights reserved.
Singlet oxygen
Reactive oxygen species
Graphene oxide
Fluorescent probe
A spectroscopic study to assess the photogeneration of singlet oxygen by graphene oxide
info:eu-repo/semantics/article
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