Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7789734 | Carbohydrate Polymers | 2015 | 28 Pages |
Abstract
In this work we have designed a novel system based on carbon dots prepared from chitosan gel capped with β-cyclodextrin and calix[4]arene-25,26,27,28-tetrol for sensitive and selective detection of fluoride ions in aqueous media. Fluorescent carbon dots prepared from chitosan gel when capped with β-cyclodextrin and calix[4]arene-25,26,27,28-tetrol results in quenching of its fluorescence intensity. Introduction of Fâ ions to carbon dots capped with β-cyclodextrin and calix[4]arene-25,26,27,28-tetrol system results in enhancement and restoration of fluorescence intensity leading to detection of Fâ ion. Minimum detection limit was determined to be â¼6.6 μM. The detection is selective as with other halide ions i.e. Clâ, Brâ and Iâ and hydroxyl ion (OHâ), there is observed decrease of fluorescence intensity. A possible mechanism to justify the observation is also discussed in the paper.
Related Topics
Physical Sciences and Engineering
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Organic Chemistry
Authors
Upama Baruah, Neelam Gogoi, Gitanjali Majumdar, Devasish Chowdhury,