A novel colorimetric and fluorescent "switch-on" probe based on xanthene-triphenylamine was developed for detection of Hg, which threatens public health, food safety and the environment. The probe displayed superior colorimetric and fluorescent selectivity/sensitivity toward Hg over a series of metal ions via Hg-triggered deprotection reaction. Hg induced a ∼18-fold enhancement in emission intensity of probe TXS with yellow fluorescence (λ = 558 nm) and led to distinct color transition from light yellow to blue or yellow under daylight depending on solvent mixture. Detection parameters were optimized and examined for the influence that they exerted on the detection which involved the usage of the Box-Behnken design methodology. The sensing pathway was also examined theoretically by DFT and TD-DFT calculations. The probe was successfully utilized for the detection of Hg in several food and water samples with good recoveries. Cell imaging studies demonstrated that the probe was suitable for Hg detection in live cells.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.foodchem.2021.131951 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
An Optoelectronic Sensing Real-Time Glucose Detection Film Using Photonic Crystal Enhanced Rare Earth Fluorescence and Additive Manufacturing.
Small
January 2025
State Key Laboratory of Electromechanical Integrated Manufacturing of High-performance Electronic Equipment, School of Mechano-Electronic Engineering, School of Life Science and Technology, Xidian University, Xi'an, Shaanxi, 710071, China.
In this research, a novel detection method employing rare-earth upconversion nanoparticle (UCNP) as the core, coated with MnO nanosheets is designed, which formed a color and fluorescence dual-responsive UCNP composite material, MnO-modified NaYF:Yb,Tm@NaYF. By enabling both colorimetric and fluorescence methods simultaneously, this composite material allows for the detection of glucose concentration under different conditions, while exhibiting strong resistance to environmental interference, chemical stability, and accuracy. To further enhance the sensitivity of the detection method, a photonic crystals (PCs)-PDMS array where polymethyl methacrylate PCs are deposited onto a substrate composed of PDMS-glass slice with hydrophobic surfaces is developed.
View Article and Find Full Text PDFMechanistic insights into the competitive inhibition of enzyme-mimetic activity of gold nanoparticles for dual mode colorimetric and fluorescence detection of biothiols.
Spectrochim Acta A Mol Biomol Spectrosc
December 2024
Division of Molecular Medicine, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram 695012, India. Electronic address:
In this work, the interaction behaviour of gold nanoparticles (AuNPs) with o-phenylenediamine (OPD) was studied to ascertain the nanozyme-substrate interaction. The UV-Vis absorption, high-resolution transmission electron microscopy and zeta potential analysis revealed that the electron-rich nitrogen atoms in OPD showed a stronger affinity toward electron-deficient surface, indicating a stronger interaction between nanozyme and substrate molecules. Subsequently, under optimum conditions, AuNPs are used as nanozyme to catalyze the oxidation of OPD in the presence of HO.
View Article and Find Full Text PDFAmino-functionalized HPU-23@Ru@Tb as light-driven oxidase-like nanozyme for colorimetric recognition of Hg and ratiometric fluorescence sensing of ClO and PO.
Mikrochim Acta
December 2024
State Collaborative Innovation Center of Coal Work Safety and Clean-Efficiency Utilization, Henan Polytechnic University, Jiaozuo, 454000, China.
A HPU-23@Ru@Tb-NH sensor array with light-driven oxidase-mimicking activity and triple-emission fluorescence was developed. It was composed of a Tb-functionalized metal organic framework and Ru(bpy) and applied to the simultaneous detection of Hg, ClO, and PO via differently responsive channels. HPU-23@Ru@Tb-NH had a photoresponsive colorimetric response toward Hg with a LOD as low as 4.
View Article and Find Full Text PDFGold nanoclusters/manganese dioxide nanosheets hybrid nanozyme with fluorescence and oxidase-like activity for dual-mode detection of acetylcholinesterase and inhibitors screening.
Anal Bioanal Chem
December 2024
College of Pharmacy, Key Laboratory of Innovative Drug Development and Evaluation, Hebei Medical University, Shijiazhuang, 050017, China.
The abnormal expression of acetylcholinesterase (AChE) is linked to the development of various diseases. Accurate determination of AChE activity as well as screening AChE inhibitors (AChEIs) holds paramount importance for early diagnosis and treatment of AChE-related diseases. Herein, a fluorescent and colorimetric dual-channel probe based on gold nanoclusters (AuNCs) and manganese dioxide nanosheets (MnO NSs) was developed.
View Article and Find Full Text PDFTiCT MXene nanoribbons@MnO: A novel multifunctional probe for colorimetric and fluorescence dual-response sensing of trichlorfon.
Talanta
December 2024
Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education, School of Agricultural Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China; College of Agricultural Equipment Engineering, Henan University of Science and Technology, Luoyang, 471003, China. Electronic address:
Manganese dioxide nanosheets (MnO NSs) have garnered significant attention in analytical sensing, while the majority of the previous reports suffer from a complex preparation process involving reducing agents, template or high-temperature. In this work, a novel MnO NSs decorated TiCT MXene nanoribbons (TiCTNR@MnO) composite was firstly assemblied via a facile one-step strategy and applied as a bi-signal generator to enable colorimetric and fluorescence (FL) dual-response sensing. During the assembly process, TiCTNR innovatively acted as both reductant and carrier to prevent the aggregation of MnO NSs.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!