Fluorogenic ferrocenyl Schiff base for Zn2+ and Cd2+ detection

Fluorogenic ferrocenyl Schiff base for Zn2+ and Cd2+ detection A novel sensor based on acetylferrocene-containing Schiff base (ASB) was synthesized by reaction of α-chloroacetylferrocene and N-(salicylidene)-l-valinmethylester. The structure of the compound was characterized by using elemental analysis and Fourier-transform infrared (FT-IR), 1H nuclear magnetic resonance (NMR), and 13C NMR spectroscopy. Its metal-cation-sensing properties were investigated spectrofluorometrically. ASB served as selective chemosensor for Zn2+ and Cd2+ towards alkali, alkaline-earth, and various heavy-metal ions. It showed significant fluorescence enhancement for Zn2+ and Cd2+ ions, stemming from C=N isomerization and chelation-enhanced fluorescence. The binding modes of the complexes were determined to have 1:1 complexation stoichiometry, and the binding constants were calculated as (6.93 ± 0.25) × 106 M−1 for ASB·Zn 2+ and (7.49 ± 0.18) × 105 M−1 for ASB·Cd 2+ using the nonlinear curve-fitting method. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Fluorogenic ferrocenyl Schiff base for Zn2+ and Cd2+ detection

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Publisher
Springer Netherlands
Copyright
Copyright © 2016 by Springer Science+Business Media Dordrecht
Subject
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1007/s11164-016-2630-8
Publisher site
See Article on Publisher Site

Abstract

A novel sensor based on acetylferrocene-containing Schiff base (ASB) was synthesized by reaction of α-chloroacetylferrocene and N-(salicylidene)-l-valinmethylester. The structure of the compound was characterized by using elemental analysis and Fourier-transform infrared (FT-IR), 1H nuclear magnetic resonance (NMR), and 13C NMR spectroscopy. Its metal-cation-sensing properties were investigated spectrofluorometrically. ASB served as selective chemosensor for Zn2+ and Cd2+ towards alkali, alkaline-earth, and various heavy-metal ions. It showed significant fluorescence enhancement for Zn2+ and Cd2+ ions, stemming from C=N isomerization and chelation-enhanced fluorescence. The binding modes of the complexes were determined to have 1:1 complexation stoichiometry, and the binding constants were calculated as (6.93 ± 0.25) × 106 M−1 for ASB·Zn 2+ and (7.49 ± 0.18) × 105 M−1 for ASB·Cd 2+ using the nonlinear curve-fitting method.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Jul 7, 2016

References

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