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Sensing performance enhancement via chelating effect: A novel fluorescent film chemosensor for copper ions

Paper ID Volume ID Publish Year Pages File Format Full-Text
28342 44071 2007 8 PDF Available
Title
Sensing performance enhancement via chelating effect: A novel fluorescent film chemosensor for copper ions
Abstract

A novel fluorescent Cu(II) sensing film was developed by covalently attaching dansyl (5-dimethylamino-1-naphthalenesulfonyl) moieties onto glass slide surface based on self-assembled monolayer technique. Fluorescence measurements showed the emission of the dansyl-functionalized film was selectively quenched by Cu(II) ions and slightly influenced by the presence of other similar divalent metal ions (Pb(II), Zn(II), Ni(II), Co(II), etc.). In addition, the sensitivity of the film towards Cu(II) was increased as expected since more binding sites, the diethylenetriamine moieties, were incorporated into the spacer. It was also found that the presence of organic anions like acetate, citrate, and tartrate, etc. could enhance the quenching efficiency of Cu(II) compared with inorganic anions such as chloride, sulfate, and nitrate. This observation was explained by considering the spacer screening effect as discovered previously. Moreover, the response of the film toward Cu(II) is fully reversible which makes it attractive for sensing application.

Keywords
Dansyl; Fluorescence; Sensing film; Cu(II); Chelating effect
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Sensing performance enhancement via chelating effect: A novel fluorescent film chemosensor for copper ions
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 186, Issues 2–3, 25 February 2007, Pages 143–150
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
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