Self-co-reactant and ion-annihilation electrogenerated chemiluminescence of carbon nanodots

Long, Y, Bao, L, Peng, Y, Zhang, Z and Pang, D 2018, 'Self-co-reactant and ion-annihilation electrogenerated chemiluminescence of carbon nanodots', Carbon, vol. 129, pp. 168-174.


Document type: Journal Article
Collection: Journal Articles

Title Self-co-reactant and ion-annihilation electrogenerated chemiluminescence of carbon nanodots
Author(s) Long, Y
Bao, L
Peng, Y
Zhang, Z
Pang, D
Year 2018
Journal name Carbon
Volume number 129
Start page 168
End page 174
Total pages 7
Publisher Elsevier
Abstract Recently, the electrogenerated chemiluminescence (ECL) of carbon nanodots (C-dots) have been detected and the signal is applied for sensitive determination of environmental pollutes and biological active molecules. A few of researches have been reported on the mechanisms of C-dots that the electro-generated cation and anion intermediates undergo electron-transfer annihilation to give off strong ECL emission, which is quite similar to other nanoparticles. In this work, the ECL of C-dots through both co-reactant and annihilation pathways was examined by polarizing the working and counter electrodes in each isolated compartment of an H-shaped electrolytic cell. The peculiar self-co-reacted anodic ECL of C-dots was observed for the first time, to our best knowledge. The oxygen-containing groups especially the benzylic alcohol on the surface were proposed to turn into a strong reductant after losing one electron and one proton on anode, reducing the electrogenerated C-dots +[rad] to exciting state C-dots* and causing the ECL emission. The ion-annihilation ECL under potential cycling and stepping was also observed which is mixed with co-reactant ECL. This work provided an insight into the distinctive structures of C-dots and the corresponding luminescent peculiarity.
Subject Electroanalytical Chemistry
Nanomaterials
Keyword(s) Active molecules
Benzylic alcohols
Carbon nanodots
Counter electrodes
Electrogenerated chemiluminescence
Electron transfer
Oxygen containing groups
Potential cycling
DOI - identifier 10.1016/j.carbon.2017.11.073
Copyright notice © 2017 Elsevier Ltd
ISSN 0008-6223
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