Abstract
It was found that silver nanoparticles could strongly enhance the chemiluminescence (CL) of the luminol-KIO4 system in the presence of Co2+. The most intensive CL signals were obtained with silver nanoparticles in diameter of 22 nm. The studies of UV-visible spectra and CL spectra were carried out to explore the possible CL enhancement mechanism. Moreover, the influences of 17 amino acids and 25 organic compounds on the luminol-KIO4-Co2+-Ag NPs CL system were studied by a flow injection procedure, which led to an effective method to detect these compounds.
Highlights
Chemiluminescence (CL) has received many chemists’ attention due to its advantages: high sensitivity, simplicity, wide linear detection range and rapidity in signal detection [1]-[6]
We examined the response of Ag NPs for CL intensity of the luminol-KIO4-Co2+ system
We have studied the kinetic characteristics of the CL reaction system, no obvious CL emission was observed when luminol was mixed with KIO4 in the absence of Ag NPs or Co2+
Summary
Chemiluminescence (CL) has received many chemists’ attention due to its advantages: high sensitivity, simplicity, wide linear detection range and rapidity in signal detection [1]-[6]. Nanoparticles (NPs) have been widely studied for their excellent performance [7]-[11]. They display special optical, mechanical, electrical, magnetic and catalytic properties. The combination of nanoparticles with chemiluminescence has attracted substantial interest because the noble metal nanoparticles have been found to participate in CL reactions as a catalyst, reductant, luminophor, and energy acceptor [20] [21]. We examined the response of Ag NPs for CL intensity of the luminol-KIO4-Co2+ system. The possible enhancement mechanism of Ag NPs on luminol-KIO4-Co2+ CL reaction was investigated in terms of the UVvisible and CL spectra in detail. The influences of amino acids and organic compounds on the luminol-KIO4-Co2+-Ag NPs CL system were reported in extension
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