期刊
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
卷 264, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2021.120282
关键词
Plasmon-catalyzed; P-nitrothiophenol; P,p'-dimercaptoazobenzene; Reduction reaction
类别
资金
- National Natural Science Foun-dation of China [21671089]
- Scientific Research Pro-jects of Liaoning Provincial Department of Education [L2020002]
- Liaoning Provincial Natural Science Foundation [2020-YKLH-22]
The study investigates the mechanism of SO32- ions promoting the conversion of PNTP to DMAB on gold nanoparticles, demonstrating high selectivity and providing a new detection method for SO32- ions in the future.
The conversion of p-aminothiophenol (PATP) or p-nitrothiophenol (PNTP) to p,p'-dimercaptoazobenzene (DMAB) has been used as model reactions to study plasmon-catalyzed reaction on nanoparticles. Herein, we report the conversion of PNTP to DMAB which is triggered by SO32- ions on gold nanoparticles (AuNPs) for the first time. With the addition of SO32-, the Raman peaks at 1139, 1392, 1437 cm(-1) appears, which indicates the formation of DMAB. The experiment results suggested that the synergistic effect of AuNPs and SO32- promoted the conversion of PNTP to DMAB. Besides, the proposed catalysis system is high selectivity to SO32- ions, which provides a new detection route to SO32- ions in the future. More importantly, the possible reaction mechanism has been put forward which is helpful to understand the surface plasmon-assisted catalytic reduction of PNTP on the surface of SERS substrate. (C) 2021 Elsevier B.V. All rights reserved.
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