Facile Fluorescent Differentiation of Aminophenol Isomers Based on Ce-Doped Carbon Dots

Abstract

Establishing a facile distinction protocol for isomers is still imminently desired. However, the use of a fluorescent probe to differentiate between aminophenol isomers is rarely reported. Herein, we propose a novel fluorescent strategy, based on ceriumdoped carbon dots (Ce-CDs), for the convenient differentiation and sensitive monitoring of aminophenol isomers. The Ce-CDs were synthesized through a facile hydrothermal approach using Dendrobium officinale and Ce(NH 4 ) 2 (NO 3 ) 6 as raw materials; the Ce-CDs possessed sufficient stability and excellent peroxidase-like activity. The synthesized Ce-CDs can catalyze the H 2 O 2 -mediated oxidation of aminophenol isomers resulting in different fluorescence behaviors, which is convenient for distinction of the aminophenol isomers. Notably, the Ce-CD-based fluorescent sensor was highly selective and sensitive for determining o-aminophenol (OAP) and m-aminophenol (MAP) with a low detection limit of 0.033 μM, respectively. The fluorescent method was successfully applied to monitor the presence of MAP and OAP in real water samples, which illustrated its significant potential for application in other environmental assays.

Effects of multifunctional cerium-doped carbon dots on photosynthetic capacity and nutritional quality of lettuce

“…The FT-IR spectra of Ce-CDs show a broad absorption peak at 3424.96 cm −1 , which can be attributed to the stretching vibration of the hydroxyl group in the surface functional group. The peaks at 1643.05, 1563.99, 1403.92, and 1020.16 cm −1 may be due to the stretching vibrations of the CO, C–O, C–N, and C–N–C bonds, respectively, 44 suggesting the presence of a large number of carboxyl and hydroxyl functional groups on the surface of CDs.…”

Highly selective detection and differentiation of aminophenol isomers based on a bimetallic metal–organic-framework with peroxidase-like activity

“…Accidental human exposure to aminophenol can result in symptoms such as headaches and nausea, with severe cases potentially leading to internal organ failure and posing a threat to life and well-being. 30 Consequently, the development of rapid, sensitive and cost-effective methods for the detection of aminophenol isomers is significant. Although the HPLC method for the simultaneous detection of aminophenol isomers has a satisfactory detection range, this approach requires costly instrumentation and complicated procedures.…”

Peroxidase Mimic Sulfur‐Rich CuO‐Carbon Nitride Core‐Shell Nanorods for the Colorimetric Detection of Aminophenol Isomers

“…Recently, Zhao et al. used Ce‐doped carbon dots for the fluorescent detection of aminophenol isomers such as o ‐AP and m ‐AP in the presence of H 2 O 2 [1a] . However, detailed investigations related to kinetic properties of nanozymes for the oxidation of aminophenol isomers with earth abundant catalysts are still limited.…”

“…Also there is a requirement that the analyte must absorb effectively on the surface [9] . Spectrophotometric methods offer low cost and facile detection strategies but are time consuming and subject to interference from other substances which result in improper performance [1a] . Therefore, the development of novel chemosensors for highly efficient and interference free detection of organic isomers is still in demand.…”