Related Experiment Video
Updated: May 9, 2025

A Dual-Functional Electroactive Filter Towards Simultaneously SbIII Oxidation and Sequestration
Published on: December 5, 2019
Dual-Function Bis-Tetraphenylethenes for Selective Metal Ion and Glutathione Detection and Current Transformer
Sinan Bayindir1, Sebiha Akar1, Abdullah S Hussein1,2
1Department of Chemistry Faculty of Sciences and Arts, Bingöl University, 12000, Bingöl, Türkiye.
None:
This study reports the synthesis of bis-substituted tetraphenylethenes (TPEs) and the investigation of their photophysical and photochemical properties. Utilizing the aggregation-induced emission characteristic of TPEs, this study demonstrates that BPh-TPE and BRh-TPE function as "turn-off" fluorescent sensors for detecting Cu2+ and Hg2+/Ag+, respectively, exhibiting quenched fluorescence in the presence of these ions. The limits of detection (LODs) for Cu2+, Hg2+, and Ag+ are determined to be 299, 522 nM, and 1.58 μM, respectively. Interestingly, the probes also show "turn-on" fluorescence upon the addition of glutathione (GSH) in the presence of Cu2+ or Hg2+. Specifically, the LOD for GSH using the BPh-TPE-Cu2+ complex is 457 nM. Practical applicability is confirmed via visual color changes on filter paper and in water samples. These findings highlight the potential of these TPE derivatives for detecting copper, mercury, silver ions, and GSH in environmental water. Additionally, Al/organic layer/p-Si heterojunction devices incorporating spin-coated TPE layers are fabricated. Their electrical behaviors are analyzed through current-voltage and current-time measurements under varying light conditions. Transient photocurrent analysis indicates strong photoresponse, supporting their suitability for optoelectronic and photovoltaic applications.
More Related Videos
10:31Detection and Recovery of Palladium, Gold and Cobalt Metals from the Urban Mine Using Novel Sensors/Adsorbents Designated with Nanoscale Wagon-wheel-shaped Pores
Published on: December 6, 2015
05:35Quantification of Metal Leaching in Immobilized Metal Affinity Chromatography
Published on: January 17, 2020
Related Concept Videos
Potentiometry: Membrane Electrodes
Complexometric Titration: Ligands
Complexometric Titration: Overview
Effects of EDTA on End-Point Detection Methods
In the visual method, metal-ion indicators (metallochromic dyes), which have distinct colors in their free and complex forms, are added to the mixture to signal the titration's end point. They form stable complexes with metal ions, but these complexes are weaker than the corresponding metal–EDTA complexes. As a...
EDTA: Direct, Back-, and Displacement Titration
Direct titration involves buffering the metal ion solution to the desired pH and directly titrating with standard EDTA until the endpoint. The optimum pH ensures a large conditional formation constant of metal−EDTA and visibility of the free indicator color in the solution. In addition, auxiliary complexing reagents are used to prevent the precipitation of metal hydroxides...