Hydrazone Based Dual – Responsive Colorimetric and Ratiometric Chemosensor for the Detection of Cu2+/F− Ions: DNA Tracking, Practical Performance in Environmental Samples and Tooth Paste

Colorimetric sensors have attracted wide scope of attentions due to its fascinating advantages, like handy, equipment-free and naked eye detections. In this investigation, a new and novel hydrazone based dual-responsive ratiometric/colorimetric chemosensor have been developed for highly selective an...

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Bibliographic Details
Published in:Journal of fluorescence 2020-03, Vol.30 (2), p.275-289
Main Authors: Anbu Durai, Willsingh, Ramu, Andy
Format: Article
Language:English
Subjects:
Analytical Chemistry
Biochemistry
Biological and Medical Physics
Biomedical and Life Sciences
Biomedicine
Biophysics
Biotechnology
Chemical sensors
Chemoreceptors
Colorimetry
Copper
Deoxyribonucleic acid
Dimethyl sulfoxide
DNA
Hydrazones
NMR
Nuclear magnetic resonance
Original Article
Titration
Toothpaste
Tracking
Voltammetry
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Summary:Colorimetric sensors have attracted wide scope of attentions due to its fascinating advantages, like handy, equipment-free and naked eye detections. In this investigation, a new and novel hydrazone based dual-responsive ratiometric/colorimetric chemosensor have been developed for highly selective and sensitive detection of Cu 2+ and F − ions in dimethyl sulfoxide (DMSO) solvent. The probe showed highly selective sensing towards Cu 2+ and F − ions by exhibiting a color change from pale yellow to yellowish green and pale yellow to yellowish brown respectively., in DMSO without any interference of other ions at same concentration. These experimental results have also substantiated by the NMR, HR-MS, UV-Vis spectroscopic, cyclic voltammetry, differential pulse voltammetry techniques and DFT calculations. The detection limits are found to be 5.8 μM for Cu 2+ and 0.025 μM for F − ions which is far below to the values recommended by WHO. The stoichiometric ratios between NAPCBH and Cu2+/ F- ions were confirmed from the Job’s plots and 1 H NMR titration experiments which are found to be 2:1 and 1:1 respectively. The tracking ability of the DNA with NAPCBH-Cu 2+ was studied by UV-Vis titration and Cyclic voltammetry measurements. It shows efficient affinity towards DNA with NAPCBH-Cu 2+ . The probe can also quantitatively determine the Copper and fluoride ions present in environmental samples & toothpaste. The NAPCBH was promptly recovered by utilizing very low concentration of HCl, showing that was found feasible and re-usable sensor for the convenient detection of Cu 2+ and F − ions. Graphical Abstract
ISSN:1053-0509
1573-4994
DOI:10.1007/s10895-020-02488-0