Surface plasmon-assisted catalytic reduction of p-nitrothiophenol for the detection of Fe2+ by surface-enhanced Raman spectroscopy

Ye Sun; Guangda Xu; Yue Wang; Peng Song; Yao Zhang; Lixin Xia

doi:10.1016/j.ab.2023.115314

Surface plasmon-assisted catalytic reduction of p-nitrothiophenol for the detection of Fe²⁺ by surface-enhanced Raman spectroscopy

Anal Biochem. 2023 Nov 1:680:115314. doi: 10.1016/j.ab.2023.115314. Epub 2023 Sep 8.

Authors

Ye Sun¹, Guangda Xu¹, Yue Wang¹, Peng Song², Yao Zhang³, Lixin Xia⁴

Affiliations

¹ College of Chemistry, Liaoning University, Shenyang, 110036, People's Republic of China.
² College of Physics, Liaoning University, Shenyang, 110036, People's Republic of China.
³ College of Chemistry, Liaoning University, Shenyang, 110036, People's Republic of China; Chemistry and Chemical Engineering Guangdong Laboratory, Shantou, 515031, People's Republic of China. Electronic address: zhangyao@lnu.edu.cn.
⁴ College of Chemistry, Liaoning University, Shenyang, 110036, People's Republic of China. Electronic address: lixinxia@lnu.edu.cn.

PMID: 37678582
DOI: 10.1016/j.ab.2023.115314

Abstract

Herein, we developed a concise, time-efficient, and high selective assay for detecting Fe²⁺ through its triggered surface plasmon-assisted reduction reaction of p-nitrothiophenol (PNTP) to p,p'-dimercaptoazobenzene (DMAB) on the surface of gold nanoparticles (AuNPs) based on surface-enhanced Raman scattering (SERS) spectroscopy. When Fe²⁺ was added to the PNTP-AuNPs system, the appearance of three characteristic peaks at 1142, 1392, and 1440 cm^-1 attributed to DMAB demonstrated that Fe²⁺ induced the catalytic coupling reaction of PNTP. The Raman intensity ratio of the peak at 1142 cm^-1 to the peak at 1336 cm^-1 and the concentration of Fe²⁺ presented a good linear response from 10 to 100 μM with a limit of detection (LOD) of 0.35 μM. More importantly, the entire detection process can be completed within 2 min and further successfully used for the detection of Fe²⁺ in river water.

Keywords: Detection of Fe(2+); Surface plasmon; Surface-enhanced Raman scattering spectroscopy.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Antibodies
Gold
Metal Nanoparticles*
Spectrum Analysis, Raman*

Substances

Gold
p,p'-dimercaptoazobenzene
Antibodies