| Autor: |
Mabhai, Subhabrata, Dolai, Malay, Dey, Surya Kanta, Choudhury, Sujata Maiti, Das, Bhriguram, Dey, Satyajit, Jana, Atanu, Banerjee, Deb Ranjan |
| Předmět: |
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| Zdroj: |
New Journal of Chemistry; 4/21/2022, Vol. 46 Issue 15, p6885-6898, 14p |
| Abstrakt: |
An azo armed Schiff base chemosensor was synthesized based on a naphthalene fluorophore, which transduces greenish-yellow emission by complexing with Al3+. It emits greenish-yellow fluorescence through restricted C＝N isomerization, chelation-enhanced fluorescence, and the photo-induced electron transfer mechanism. The clear visible transformation of the achromatic ligand to a chromatic ligand by the 1 : 1 complexation with Al3+ is substantiated by ESI-MS spectra. 1H NMR, 13C NMR, and FTIR spectroscopies are used to characterize the HL. The selectivity of the HL for Al3+ in the presence of other metal ions was investigated through absorbance and fluorescence spectroscopies. The average lifetimes of HL and L–Al3+ have been evaluated using a time-resolved photoluminescence experiment to explore the sensing mechanism. The Al3+ sensing mechanism was also established by density functional theory calculations. A reversibility experiment was performed, demonstrating that Al3+ binding to HL is reversible. The pH variation on luminescence affirms that the HL can survive in physiological pH. Finally, the lower limit of detection of 5.4 × 10−7 and a good response in a cytotoxicity and cell imaging study confirm the usability of the ligand as an indelible signature of an effective biosensor for target Al3+. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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