An anthracene based fluorescent probe for the selective and sensitive detection of Chromium (III) ions in an aqueous medium and its practical application

Abstract

An anthracene based fluorescent probe, integrated with thiophene moiety, exhibited selective and sensitive detection of chromium (III) ions over other metal ions. Its synthesis was achieved by simple mixing of two commercially available compounds, 2-aminoanthracene, and 2-thiophenecarboxaldehyde, in onestep without the needed complex purification process. The probe molecule (ANT-Th) offered exceptional features such as "turn-on" fluorescence response, low detection limit (0.4 µM), and fast response time (<1 min) via C = N bond hydrolysis. Also, a simple test paper system was developed for the rapid detection of chromium (III) ions with the naked eye.

Thiophene-Appended Benzothiazole Compounds for Ratiometric Detection of Copper and Cadmium Ions with Comparative Density Functional Theory Studies and Their Application in Real-Time Samples

“…Thus, the comparison of this research work with the previously reported papers is given in Table . − The results of comparison clearly show that the previously reported thiophene-appended imine-conjugated small molecules do not show any emission spectrum until the metal ion was added. While we achieved in synthesizing fluorescent probe L2 with a quantum yield of 0.002939, it shows an enhanced emission upon addition of cadmium ions.…”

A Comprehensive Review on Thiophene Based Chemosensors

“…To investigate the potential of probe 13 in practical applications, probe (10 µM) in CH 3 CN/HEPES solution (v/v 6:4) at pH 7 was introduced onto circular test papers. They did not exhibit emission at 366 nm under UV light in the absence of metal ions, while only Cr 3+ ions exhibited a green emission [ 41 ] by a “turn-on” response ( Scheme 12 ) , thereby making it an efficient tool for Cr 3+ detection.…”

Coumarin-hydrazone-based fluorescence sensor for Al(III) detection in aqueous solution: DFT calculation and DNA interaction studies

“…In recent years, the development of highly sensitive and selective chemosensors for the detection of metal ions and anions has been of special interest to many researchers [1][2][3][4]. Not only because of their importance in living systems, medicine, and the environment, but also because they play essential roles in biological, chemical, ecological, and endocrine systems [5][6][7][8]. These metal ions and anions are also related to diverse environmental issues and other health-related problems.…”