Peroxynitrous-Acid-Induced Chemiluminescence of Fluorescent Carbon Dots for Nitrite Sensing

Abstract

In this work, chemiluminescent (CL) property of the carbon dots in the presence of peroxynitrous acid was studied. Peroxynitrous acid is formed by online mixing of nitrite and acidified hydrogen peroxide. The CL intensity was increased linearly with nitrite concentration in the range from 1.0 × 10(-7) M to 1.0 × 10(-5) M, and the detection limit was 5.3 × 10(-8) M (signal-to-noise ratio of S/N = 3). This method has been successfully applied to the determination of nitrites in pond water, river water, and pure milk, with recoveries in the range of 98%-108%. The CL mechanism of the peroxynitrous acid-carbon dots system was investigated using the CL, ultraviolet-visible light (UV-vis), and electron paramagnetic resonance (EPR) spectra. The electron-transfer annihilation of hole-injected and electron-injected carbon dots could mainly account for the CL emission, which sheds new light on the optical properties of the carbon dots.

Carbon Based Dots and Their Luminescent Properties and Analytical Applications

“…During the thermal treatment, one serves as the carbon source (either the acid or the base part, dependent on their stability), the other part serves as the surface modifier. Other groups mixed the organic molecules used as the carbon source with some polymers together followed by various kinds of thermal treatments [92,100,132,135,136,142,154,158]. Most of the obtained modified or passivated CDs showed good PL activities.…”

“…Lin's group found that the CDs, synthesized from glycerine and PEG using a microwave method, could produce strong CL emission in the presence of NaNO 2 and H 2 O 2 [135]. The CL spectrum of the CDs-NaNO 2 -H 2 O 2 system located in the wide range of 400-600 nm and centered at 520 nm.…”

Recent Advances in Graphitic Carbon Nitride-Based Chemiluminescence, Cataluminescence and Electrochemiluminescence

“…The process of transforming chemical energy into light emission [44], a phenomenon known as chemiluminescence (CL), has been an attractive topic of intensive research since 1920s [45,46], in view of its fundamental mechanistic significance and the diversity of practical applications [47][48][49][50][51][52][53][54]. CL-based chemosensors show superior sensitivity which is ascribed to the avoidance of the noise caused by light scattering and feature simpler setup with lower background emissions in comparison with photoluminescence-sensing systems [55,56].…”

Mechanism of intracellular detection of glucose through nonenzymatic and boronic acid functionalized carbon dots

“…Moreover, they can be functionalized and rendered biocompatible. 33,34 Based on the excellent properties, carbon dots can be made viable for sensors 35 such as biosensors for DNA, 36 nitrite, 37 and phosphate, 38 glucose, 39 a-fetoprotein 40 or metal ions. Carbon dots can be synthesised using eco-friendly processes, such as arc discharge, 41 laser ablation [42][43][44][45][46] carbonization of carbohydrates, electrochemical oxidation, and thermally supported synthesis.…”