A highly selective dual mode detection of Fe3 + ion sensing based on 1,5-dihydroxyanthraquinone in the presence of β-cyclodextrin

• 1:1 inclusion complex is formed between 1,5-DHAQ and β-CD.
• β-CD:1,5-DHAQ probe exhibits a coordinate tendency toward Fe3 + ion.
• The Fe3 + ion is responsible for changing the color of the solution.
• Enhanced limit of detection is 2.19 ∗ 10− 7 M (β-CD:1,5-DHAQ:Fe3 +).
• Determination of trace amount of Fe3 + ion from the real samples

1,5-Dihydroxyanthraquinone (1,5-DHAQ) and in the presence of β-cyclodextrin (β-CD) has been used to find Fe3 + ion in aqueous solution by UV–visible and fluorescence spectroscopy. The chromo-fluorogenic probe undergoes absorption and emission intensity enhancement upon binding to Fe3 + ion in pH ~ 7 aqueous solutions. The enhancement of the chemosensor probe is attributed to a 1:1 inclusion complex formation between β-CD and 1,5-DHAQ, which has been utilized as the basis for selective detection of Fe3 + ion. The chemosensors can be applied to the selectivity and sensitivity analysis which showed that the remarkable sensing limit of detection (LOD) was 7.3 ∗ 10− 7 M (β-CD/1,5-DHAQ:Fe3 +). The proposed chemosensors based on 1,5-DHAQ and in the presence of β-CD has a good selectivity, sensitivity and potential application to the determination of Fe3 + ion in environmental and biological systems.

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