• 文献标题:   A spectroscopic study to assess the photogeneration of singlet oxygen by graphene oxide
  • 文献类型:   Article
  • 作  者:   FELIPLEON C, PUCHE M, MIRAVET JF, GALINDO F, FELIZ M
  • 作者关键词:   singlet oxygen, reactive oxygen specie, graphene oxide, fluorescent probe
  • 出版物名称:   MATERIALS LETTERS
  • ISSN:   0167-577X EI 1873-4979
  • 通讯作者地址:   Univ Jaume 1
  • 被引频次:   4
  • DOI:   10.1016/j.matlet.2019.05.001
  • 出版年:   2019

▎ 摘  要

The photogeneration of singlet oxygen (O-1(2) ) during short irradiation times of graphene oxide (GO) is assessed under visible light with soft irradiation conditions either directly monitoring the phosphorescence emission of O-1(2) 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 O-1(2) 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 O-1(2), 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 O-1(2) by irradiated GO is informative and useful, especially for the assessment of the environmental and biological toxicity of nanomaterials based on GO. (C) 2019 Elsevier B.V. All rights reserved.