The fluorescent emission and the photocatalytic activity of gold nanoclusters (AuNCs) are important properties of AuNCs. Here, we synthesized water-soluble, captopril (Capt) and glutathione (GSH) covered Au25(Capt)18 and Au15(GSH)13 nanoclusters and investigated their fluorescence stabilities which are correlated with the photo-redox of their surface. It was observed that Au25(Capt)18 exhibited a decay in its two-photon fluorescence emission induced by surface oxidation upon irradiation of femtosecond near-infrared laser (810 nm, 300 mW) in the presence of oxygen (O2). On the other hand, the two-photon fluorescence from Au15(GSH)13 was stable upon the same excitation. The different stabilities of the fluorescence of the two AuNCs were attributed to their different band gaps. This interpretation was confirmed by one-photon excitation with photon energy beyond the band gaps of the two AuNCs. Using experiments with the addition of several agents, the photocat alytic redox activities of gold atoms on the surface of Au25(Capt)18 were understood and tuned.
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June 2024
Research Article|
June 01 2024
Stability of fluorescence emission from gold nanoclusters and photocatalytic redox on surface†
Special Collection:
In Memory of Prof. Qihe Zhu on the occasion of his 100th Anniversary
Johar Zeb;
Johar Zeb
a
Shenzhen Key Laboratory of Flexible Printed Electronics Technology, School of Science, Harbin Institute of Technology (Shenzhen)
, Shenzhen 518055, China
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Huijun Guo;
Huijun Guo
a
Shenzhen Key Laboratory of Flexible Printed Electronics Technology, School of Science, Harbin Institute of Technology (Shenzhen)
, Shenzhen 518055, China
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Qunhui Yuan;
Qunhui Yuan
b
Shenzhen Key Laboratory of Flexible Printed Electronics Technology, School of Materials Science and Engineering, Harbin Institute of Technology (Shenzhen)
, Shenzhen 518055, China
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Wei Gan
Wei Gan
*
a
Shenzhen Key Laboratory of Flexible Printed Electronics Technology, School of Science, Harbin Institute of Technology (Shenzhen)
, Shenzhen 518055, China
*Author to whom correspondence should be addressed. E-mail: [email protected]
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*Author to whom correspondence should be addressed. E-mail: [email protected]
†
Part of Special Issue “In Memory of Prof. Qihe Zhu on the occasion of his 100th Aniversary”.
Chin. J. Chem. Phys. 37, 429–438 (2024)
Article history
Received:
December 16 2023
Accepted:
January 18 2024
Citation
Johar Zeb, Huijun Guo, Qunhui Yuan, Wei Gan; Stability of fluorescence emission from gold nanoclusters and photocatalytic redox on surface. Chin. J. Chem. Phys. 1 June 2024; 37 (3): 429–438. https://doi.org/10.1063/1674-0068/cjcp2312132
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