Gold nanocluster-enhanced peroxynitrous acid chemiluminescence for high selectivity sensing of nitrite

Abstract

Peroxynitrous acid (ONOOH) produced by online mixing of nitrite and acidified hydrogen peroxide could induce weak chemiluminescence (CL). A stronger chemiluminescence was observed in the presence of gold nanoclusters (Au NCs). This novel CL system was developed as a flow-injection method for the nitrite determination directly and conveniently. This method was achieved in acidic medium, which greatly improved its selectivity. The CL mechanism of the peroxynitrous acid-gold nanocluster system was investigated using CL spectroscopy, UV-visible spectroscopy and radical scavengers. The enhanced CL could be attributed to the catalysis of Au nanoclusters. The proposed method has been applied to determine nitrite in water samples with good accuracy and precision.

Chemiluminescence and electrochemiluminescence applications of metal nanoclusters

“…BSA has been used frequently since Ying et al [77] developed a new method for preparing Au NCs with red emissions using BSA to sequester and reduce Au precursors in situ. Many scientists found BSA@AuNCs [46,[78][79][80], BSA@Cu NCs [81,82], and BSA@Zn/Cu alloy NCs [83] could act as ECL emitter or CL catalyst to enhance ECL or CL signal. Graphene/multiwall carbon nanotube hybrid (GP/MWCNTs) could be also used as template to prepare GP/MWCNTs/Au NCs composite [84].…”

“…In 2005, Au nanoparticles-amplified luminol CL was reported by Cui et al [86]. Since then, a series of different CL systems based on Au, Ag, Pt, ZnO nanoparticles has been investigated [87][88][89][90] and it was found that some metal NCs (e.g., Au, Ag, Cu, Zn/Cu alloy NCs ) could enhance intensity of CL systems including luminol-H 2 O 2 [81,91], luminol-KMnO 4 [82], NaNO 2 -H 2 O 2 [78], Ce(IV)-Na 2 SO 3 [70,71], NaHCO 3 -H 2 O 2 [83].…”

“…In 2015, Chen's group [78] demonstrated that Au NCs could increase the ultra-weak CL system of the in situ formed peroxynitrous acid (ONOOH) by mixing NaNO 2 and acidified H 2 O 2 . Au NCs effectively catalyzed the decomposition of H 2 O 2 to produce double hydroxyl radicals which reacted with NO 2 -to form the ONOOH, and then ONOOH was transformed to nitrate via the ONOOH*, which emitted light.…”

Core-shell Au@Pt Nanoparticles Catalyzed Luminol Chemiluminescence for Sensitive Detection of Thiocyanate

“…Experimental conditions: SCNions was 0.3 µM, other ions were 0.03 mM, Na2C2O4 was 1.2 mM.Analytical SciencesAdvance Publication by J-STAGE Received December 17, 2019; Accepted February 14, 2020; Published online on February 28, 2020 DOI: 10.2116/analsci.19P475Fig. 7(a) When SCNin different concentrations (0,5,10,15,20,25,30, 60, 90, 120, 150, 180 nM) existed in Au@Pt NPs-luminuol-H2O2 system, CL kinetic curves of SCNwere detected.The black curve was the CL kinetic curve for the reaction of luminol + H2O2, (b) Calibration curve of SCN -. Experimental conditions: luminol and H2O2 reaction time was 4 h, 3.5 mM luminol in 0.1 M NaOH solution, Au@Pt NPs was 0.3 nM, H2O2 was 10 mM.…”

Determination of nitrite in real food and water samples by a novel terbium-macrocycle complex

“…6 Consequently, rapid and sensitive determination of nitrite levels is essential for monitoring human health in many aspects, such as in drinking water and daily foods, as well as clinical diagnosis. 7,8 To this end, many analytical methods have been developed for the detection of nitrite, such as spectrophotometry, [9][10][11][12] electrochemical analysis, [13][14][15][16][17][18] chemiluminescence, 19,20 etc. However, these traditional methods oen require complicated and expensive instruments, and may cause the secondary pollution due to the use of high toxicity diazo coupling reagent.…”