We provide a highly sensitive and selective colorimetric assay to detect mercury ions (Hg(2+)) in aqueous environment using thiocyanuric acid (TCA) molecule-functionalized gold nanoparticles (AuNPs). This method is based on the thiophilicity of Hg(2+) and AuNPs as well as the unique optical properties of TCA-functionalized AuNPs. In the presence of TCA, AuNPs aggregate due to the strong attraction between thiol groups of TCA and surface-bounded AuCl4(-)/AuCl2(-) ions, which induces the visible color change from red to blue. With the addition of Hg(2+), Hg(2+) is more apt to interact with thiols than AuNPs. Thus, Hg(2+) can remove the AuNPs of the TCA-functionalized AuNPs and trigger AuNP aggregation redisperse again. This assay can selectively detect Hg(2+) with the detection limits as low as 0.5 nM in aqueous solution.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.talanta.2014.11.065 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Comparative analysis of heavy metals toxicity in drinking water of selected industrial zones in Gujranwala, Pakistan.
Sci Rep
December 2024
College of Water Conservancy and Architectural Engineering, Shihezi University, Shihezi, 832000, Xinjiang, China.
Heavy metal contamination of drinking water, primarily driven by industrial activities, represents a critical challenge, with implications for human health and environmental safety. Gujranwala is an industrial and thickly populated city. The current study aimed to assess and compare heavy metal contamination levels in drinking water from five industrial areas and evaluate their potential impacts on human health.
View Article and Find Full Text PDFFine-Modulation of Perovskite Ion-Additive Binding Interaction Using Multidentate Ligation for High Performance Perovskite Light-Emitting Diodes.
ACS Nano
December 2024
Department of Chemistry, Korea University, Seoul 02841, Republic of Korea.
Research on perovskite light-emitting diodes (PeLEDs) has primarily focused on modulating crystal growth to achieve smaller grain sizes and defect passivation using organic additives. However, challenges remain in controlling the intermolecular interactions between these organic additives and perovskite precursor ions for precise modulation of crystal growth. In this study, we synthesize two triphenylphosphine oxide (TPPO)-based multidentate additives: bidentate hexane-1,6-diyl-bis(oxy-4-triphenylphosphine oxide) (2-TPPO) and tetradentate pentaerythrityl-tetrakis(oxy-4-triphenylphosphine oxide) (4-TPPO).
View Article and Find Full Text PDFBiogenic Synthesis of Silver Nanoparticles for Nanosensor-Based Mercury Detection.
Luminescence
December 2024
Department of Chemistry, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences (SIMATS), Saveetha University, Chennai, Tamil Nadu, India.
The production of nanoparticles via green methods is a developing study domain due to potential environmental applications. The green synthesis method is very easy, less toxic and eco-friendly when compared to the chemical synthesis method. This study addresses the silver nanoparticle synthesis utilizing the Acorus calamus leaf extract, which was then employed for environmental applications.
View Article and Find Full Text PDFA method for the rapid detection of heavy metal mercury ions based on a novel mercury chelator N,N'-bis (2-mercaptoethyl) isophthalamide.
Food Chem
December 2024
Development Center of Plant Germplasm Resources, College of Life Sciences, Shanghai Normal University, Shanghai 200234, China. Electronic address:
Mercury has caused severe harm to the environment and human health. A novel biological screen method was developed and identified a Hg chelator BDTH2. Both biological and chemical methods demonstrated BDTH2 displayed a high specificity and strong binding capacity for Hg.
View Article and Find Full Text PDFA coumarin and 1,8-napthyridine conjugated novel molecular hybrid: Synthesis, DFT insights and unveiling the selective fluorescent sensing of Hg ions with live-cell imaging application.
Spectrochim Acta A Mol Biomol Spectrosc
December 2024
Department of Chemistry, School of Sciences, National Institute of Technology Andhra Pradesh, Tadepalligudem 534101, Andhra Pradesh, India. Electronic address:
Herein, we have used a simple synthetic strategy to access a novel non-sulfur fluorescent molecular probe coumarin and 1,8-napthyridine conjugated probe DNCS. The developed probe has great selectivity and sensitivity for detecting Hg ions. Our photophysical properties evaluation for the synthesized probe with different metal ions (Ba, Al, Ca, Bi, Ce, Cd, Cu, Sr, Co, Fe, Cr, Fe, Mn, Hg, Zn, Pb, Ni, and Sn) unveiled the very selective and sensitive fluorescence sensing behavior with Hg ions in the energy window of near UV and visible light radiation in an organic aqueous solvent mixture (EtOH and water).
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!