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A new dihydrazone based “turn on” fluorescent sensor for Zn(II) ion in aqueous medium

Paper ID Volume ID Publish Year Pages File Format Full-Text
26788 43977 2015 8 PDF Available
Title
A new dihydrazone based “turn on” fluorescent sensor for Zn(II) ion in aqueous medium
Abstract

•A new colorimetric and fluorescent “turn-on” chemosensor I for zinc was developed;•I shows chelation enhanced fluorescence effect (CHEF) in presence of zinc•CHEF of I is selective for zinc ions even in presence of other interfering elements•Sensitivity towards zinc ion is more effective in pH 8.6•Facile proton dissociation in the excited state renders better ion-sensing ability.

A new simple dihydrazone based colorimetric and fluorescent “turn-on” chemosensor (disalicyladehyde succinoyldihydrazone, I) for Zn(II) was designed and synthesized. The photophysical behavior of the ligand and metal coordinated complex was characterized by steady state and time-resolved fluorescence, density functional theory calculation in combination with 1H NMR and mass spectroscopy results. The compound acts as a highly selective and sensitive detector of Zn(II) in aqueous medium with almost six times increase in fluorescence intensity. The optimum condition for sensing ability of I with a detection limit of ca. 2 μM of Zn(II) was found at solution pH 8.6 and at excitation wavelength of 380 nm. The other interfering elements, including Cd(II), show either no or very little change in fluorescence intensity under similar experimental conditions.

Graphical abstractThe fluorescent “turn-on” chemosensor (disalicyladehyde succinoyldihydrazone, I) is found to be a selective detector of zinc (II) with about 2 μM sensitivity.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Succinoyldihydrazone fluorescent sensor; Zinc ion; Chelation-enhanced fluorescence (CHEF); Binding constant; Detection limit
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A new dihydrazone based “turn on” fluorescent sensor for Zn(II) ion in aqueous medium
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 301, 15 March 2015, Pages 6–13
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us