Double Action: Toward Phosphorescence Ratiometric Sensing of Chromium Ion
Source abstract
Abstract
The phosphorescence double ratiometric sensor detects Cr(III) ions by taking advantage of reversible coordination binding and the biomimetic oxidation reaction.
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Source: europepmc · Quality: needs review · Source record ↗
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Research context
OpenAlex topics: Molecular Sensors and Ion Detection · Electrochemical sensors and biosensors · Analytical Chemistry and Sensors
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References (44)
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27. Among commercially available Cr(III) salts only perchlorate salt is soluble to give optically clear acetonitrile solutions.
28. At high concentraion of 1 mM addition of Cr(III) ion caused appearance of an absorption band at 610 nm (ϵ= 40 M−1cm−1). See Fig. S4 in the Supporting Information.
29. The Cr(III) ion response is observed until water content < 2 vol%.
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37. Measurements were performed in triplicate.
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42. Precise mechanistic studies and identification of intermediate species should be performed to establish the mechanism.
43. Values of the limit of detection for Cr(III) ion of the first and second phosphorescence responses are 4.8 and 3.8 ppm respectively. Refer to SI Fig. S18 for details.
44. The interference exerted by Fe(III) and Hg ions can be overcome with an excess amount of Cr(III) ion (> 20 equiv).