Dual responsive salen-type Schiff bases for the effective detection of l -arginine via a static quenching mechanism
| Autor: | S.S. Sreejith, M.R. Prathapachandra Kurup, Nithya Mohan, P.M. Sabura Begum |
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| Rok vydání: | 2018 |
| Předmět: |
chemistry.chemical_classification
Analyte Schiff base Quenching (fluorescence) 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences Fluorescence Catalysis 0104 chemical sciences Amino acid chemistry.chemical_compound chemistry Materials Chemistry Titration Absorption (chemistry) 0210 nano-technology Ground state |
| Zdroj: | New Journal of Chemistry. 42:13114-13121 |
| ISSN: | 1369-9261 1144-0546 |
| DOI: | 10.1039/c8nj02657b |
| Popis: | L-Arginine is one of the most important amino acids and plays a key role in diagnostic studies. Herein, we report four salen-type Schiff base fluorimetric/colorimetric sensors for the rapid detection of L-arginine. Substituents play a major role in the sensing mechanism of probes with the nitro-substituent bearing probe showing the highest efficiency. A 1 : 2 complexation between all the probes and the analyte was evidenced from the absorption titrations; and the fluorescence studies revealed a quenching phenomenon occurring during complex formation. From the life time measurements, the nature of quenching was found to be static and the formation of a ground state complex was confirmed. DFT calculations done at the B3LYP/TZVP level of theory corroborated the experimental findings and further established the proton transfer from the probe to the analyte during the complex formation. |
| Databáze: | OpenAIRE |
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