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A novel sensitive and selective chemosensor for fluorescent detection of Zn2+ in cosmetics creams based on covalent post functionalized Al-MOF
Publish Date
10/15/2019 12:00:00 AM
107
Authors
Rasha M. Kamel, Ahmed Shahat, Zeinab M. Anwar, Hamdy A. El-Kady, Esraa M. Kilany
Description
Fabrication of a material based on the Schiff base reaction to achieve covalent attachment of NH2-MIL-53(Al) and 3-formylsalicylic acid ligand (3-FSA) for fluorimetric detection of Zn2+ ions based on inhibition and destruction of C=N isomerization and ESIPT. The low limit of detection and limit of quantification were calculated at optimum conditions. The selectivity of the 3- FSA sensor was achieved against some interfering ions. The new sensor was applied for determination of Zn2+ ions in cosmetic creams products and the obtained results were validated through comparison with ICP-OES. The data indicated that the 3-FSA sensor provided a sensitive, selective, fast, direct and efficient determination of Zn2+ ions with good reproducibility and reversibility.
URL
journal homepage: www.elsevier.com/locate/molliq
DOI
https://doi.org/10.1016/j.molliq.2019.111798
Brief
In summary, aluminum metallic organic framework NH2-MIL-53(Al) was synthesized and modified by 3-formylsalicylic acid in a post synthetic covalent route based on the Schiff-base reaction. The fluorescence measurements indicate that the 3-FSA sensor provided selective, sensitive and fast response in seconds towards Zn2+ ions. The fluorescence enhancement is probably due to inhibition and destruction of C=N isomerization and ESIPT. The results were in great accordance with ICP-OES, confirming the 3-FSA sensor has potential applicability for the detection of Zn2+ ions in real samples.
KeyWords
Fluorescence; MOF; Chemosensors; Detection; Schiff base