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Quick speciation of iron(II) and iron(III) in natural samples using a selective fluorescent carbon dot-based probe

Hormozi Nezhad, M. R ; Sharif University of Technology | 2016

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  1. Type of Document: Article
  2. DOI: 10.1039/c6ay00083e
  3. Publisher: Royal Society of Chemistry , 2016
  4. Abstract:
  5. A new, simple and rapid carbon dot (CD) based fluorescent probe for speciation of Fe2+ and Fe3+ ions was developed. The as-prepared CDs contain phenol groups on their surfaces and due to the special coordination interaction of phenol groups with Fe3+ ions, this sensing system exhibits excellent sensitivity and selectivity toward Fe3+. In order to detect Fe2+ ions as well, a specific amount of H2O2 was introduced to the detection system to transform Fe2+ to Fe3+ of which the latter is the determinable form of iron. Under the optimum experimental conditions, the fluorescence intensity of the sensor decreased as the Fe3+ ion concentration increased. The relationship plot between the fluorescence quenching and Fe3+ ion concentration was linear within the range of 1 to 100 μM and 100 to 500 μM with a detection limit of 0.17 μM. The practical use of the designed nanoprobe in spinach and water samples is also demonstrated successfully
  6. Keywords:
  7. Fluorescence ; Iron ; Iron compounds ; Phenols ; Probes ; Quenching ; Coordination interactions ; Detection limits ; Detection system ; Experimental conditions ; Fluorescence intensities ; Fluorescence quenching ; Fluorescent probes ; Ion concentrations ; Ions
  8. Source: Analytical Methods ; Volume 8, Issue 20 , 2016 , Pages 4064-4068 ; 17599660 (ISSN)
  9. URL: http://pubs.rsc.org/en/Content/ArticleLanding/2016/AY/C6AY00083E#!divAbstract