Potassium permanganate–glutaraldehyde chemiluminescence system catalyzed by gold nanoprisms toward selective determination of fluoride

Abstract

Gold and silver nanoparticles (NPs) are shown to exert a positive effect on the chemiluminescence (CL) reaction of permanganate aldehydes. Interestingly, between various shapes examined, Au nanoprisms have the highest beneficial effect. This effect is even more notable in the presence of sodium dodecyl sulfate (SDS) surfactant. UV-vis spectra and transmission electron microscopy were used to characterize the NP shapes and sizes. Furthermore, it was observed that iron(III) ions can slightly increase CL emission of this system. This intensification is very effective in the presence of fluoride ions (F(-)). These observations form the basis of the method for the high sensitive determination of F(-) in the 6-1200 nmol L(-1) concentration range, with a detection limit of 2.1 nmol L(-1). The proposed method has good precision and was satisfactorily used in the selective determination of low concentrations of fluoride ion in real samples.

Synthesis and optimization of CdTe quantum dots with the help of erythorbic acid and ethanol

“…Also, the quenching mechanism was attributed to the nonradiative recombination because of the esterication reaction that occurred between ethanol and the carboxylic group of the stabilizer. 42 It can be seen from Fig. 8b that the rst exciton peaks of the QDs are noticeably red shied with the increase of the reaction time from 2 h to 11 h regardless of the water : ethanol ratio.…”

Fabrication and characterization of Cu(OH)2/CuO nanowires as a novel sensitivity enhancer of the luminol–H2O2chemiluminescence system: determination of cysteine in human plasma

“…In the recent decade, analytical applications of NPs have widely been explored in CL methods. 14,24,[31][32][33][34][35][36][37][38][39][40][41][42][43] It has been reported that NPs can enhance luminol-oxidant CL signals and analytes could enhance or inhibit the CL signals from luminol-oxidant-NPs system. Cysteine (a -SH containing amino acid) have been determined using some of these methods.…”