Nanomolar Detection of Palladium (II) through a Novel Seleno-Rhodamine-based fluorescent and colorimetric chemosensor

A novel reversible fluorescent probe for Pd2+ based on a rhodamine-containing selenide (Rh–Se) was designed, synthesized and fully characterized. The probe Rh–Se showed a high selectivity and sensitivity with a detection limit of 32 nM for Pd2+ ions. The formation of a complex Rh–Se/Pd2+ was confirm...

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Bibliographic Details
Published in:Dyes and pigments 2020-08, Vol.179, p.108355, Article 108355
Main Authors: Soares-Paulino, Antônio A., Giroldo, Lilian, Pradie, Noriberto A., Reis, Joel S., Back, Davi F., Braga, Ataualpa A.C., Stefani, Hélio A., Lodeiro, Carlos, Dos Santos, Alcindo A.
Format: Article
Language:English
Subjects:
Fluorescence
Naked-eye
Palladium
Probe
Rhodamine
Selenium
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Summary:A novel reversible fluorescent probe for Pd2+ based on a rhodamine-containing selenide (Rh–Se) was designed, synthesized and fully characterized. The probe Rh–Se showed a high selectivity and sensitivity with a detection limit of 32 nM for Pd2+ ions. The formation of a complex Rh–Se/Pd2+ was confirmed by HRMS. DFT calculations revealed that the proposed square planar geometry is the most stable form of the metallic complex Rh–Se/Pd2+. The probe Rh–Se showed to have high potential for the detection of residual Pd2+ in synthetic cross-coupling products and simulated pharmaceutical Pd2+- contaminated products. [Display omitted] •Seleno-Rhodamine derivative as fast (2min) and selective Pd2+ fluorescent probe.•Nanomolar Detection of Palladium (II) in aqueous solution.•Pd2+ is detected by selenium coordination.•The Rh–Se/Pd2+ complex has a strong fluorescence emission with Φ = 0.41.•Rh–Se detect Pd2+ in real systems as commercial drugs.
ISSN:0143-7208
1873-3743
DOI:10.1016/j.dyepig.2020.108355