A highly selective acridine-based fluorescent probe for detection of Al3+ in alcoholic beverage samples
| Autor: | Fabiane dos Santos Carlos, Letícia Aparecida da Silva, Cristiano Zanlorenzi, Rafael Frasson Monteiro, Fábio Souza Nunes |
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| Rok vydání: | 2020 |
| Předmět: |
Detection limit
Metal ions in aqueous solution Supramolecular chemistry Analytical chemistry 02 engineering and technology Time-dependent density functional theory 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Fluorescence Binding constant Atomic and Molecular Physics and Optics 0104 chemical sciences Analytical Chemistry Ion chemistry.chemical_compound chemistry Acridine 0210 nano-technology Instrumentation Spectroscopy |
| Zdroj: | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy. 231:118119 |
| ISSN: | 1386-1425 |
| DOI: | 10.1016/j.saa.2020.118119 |
| Popis: | 4,5-Bis(phtalimidomethyl)acridine (L) was studied as a chemosensor for metal ions in alcoholic matrices and showed to be selective for Al3+, through a linear fluorescence enhancement of 230% in the concentration range of 10–70 μmol L−1. Benesi-Hildebrand and Job's formalisms indicated the formation of a 1:1 (Al3+:L) complex with a binding constant of 6.30 × 103 L mol−1. DFT/TDDFT calculations allowed access to the energies of frontier orbitals and could explain the fluorescence augmentation upon complex formation, due to the restraining of PET process. Limit of detection and limit of quantification (R2 = 0.998, least squares method) are 1.130 and 3.768 μmol L−1, respectively, and validation was verified based on the variation of several analytical conditions. Practical application in spiked Brazilian sugarcane spirit showed recovery of (84 ± 0.42)% with no effect of interfering ions. |
| Databáze: | OpenAIRE |
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