title: Effect of amino compounds on luminol-H2O2-gold nanoparticle chemiluminescence system.
abstract: In this work, the effect of amino compounds on the catalytic property of gold nanoparticles (AuNPs) in the luminol-H2O2chemiluminescence (CL) system was systematically investigated. The experimental results showed that the catalytic ability of AuNPs on luminol-H2O2system can be changed after AuNPs interacted with the amino compounds. It was found that two main aspects influence the catalytic property of AuNPs: (1) the electron density in conduction bands of AuNPs and (2) the surface negative charge density of AuNPs. Some amino compounds can decrease the electron density in the conduction bands of AuNPs after they reacted with AuNPs, resulting in a decrease of the catalytic property of AuNPs on luminol-H2O2system. However, some amino compounds can cause AuNPs to aggregate after they reacted with AuNPs. The surface negative charge density of AuNPs would decrease, and zeta potentials were tested to verify the change of the surface negative charge density of AuNPs. As a result, the catalytic property of AuNPs on luminol-H2O2system increased, and an enhanced CL signal can be obtained after the amino compounds reacted with AuNPs. This work will help people understand the catalytic mechanism of AuNPs and establish the CL method for the determination of amino compounds. Graphical Abstract Effects of amino compound on luminol-H2O2-AuNPs CL system.
authors.affiliation: Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Yanta District, Xi'an, Shaanxi, 710062, China. weiliu@126.com.
authors.forename: Wei
authors.initials: W
authors.lastname: Liu
authors.affiliation: Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Yanta District, Xi'an, Shaanxi, 710062, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Luo
authors.affiliation: Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Yanta District, Xi'an, Shaanxi, 710062, China.
authors.forename: Mei
authors.initials: M
authors.lastname: Zhao
authors.affiliation: Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Yanta District, Xi'an, Shaanxi, 710062, China.
authors.forename: Huifang
authors.initials: H
authors.lastname: Li
authors.affiliation: Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Yanta District, Xi'an, Shaanxi, 710062, China. libaoxin@snnu.edu.cn.
authors.forename: Baoxin
authors.initials: B
authors.lastname: Li
keywords: Amino compounds; Chemiluminescence; Gold nanoparticle; Luminol