Selective fluorescence sensing of salicylic acid using a simple pyrene appended imidazole receptor?
New Journal of Chemistry Pub Date: 2014-02-10 DOI: 10.1039/C3NJ01339A
Abstract
A simple salicylic acid selective fluorescence receptor 1 was designed by combining 1-pyrenecarboxaldehyde and 1-(3-aminopropyl)imidazole. The selective sensing of salicylic acid resulted in a significant increase in monomer emissions due to the π–π interactions between the benzene and pyrene rings. The nature of the interactions between receptor 1 and salicylic acid was investigated further by 1H NMR spectroscopy, and the energy minimised structure of the complex between receptor 1 and salicylic acid was optimised. Receptor 1 showed the highest binding constant with 5-nitrosalicylic acid (Ka = 7.18 × 104 M?1) among all the aromatic carboxylic acids tested. 5-Nitrosalicylic acid formed a complex with receptor 1 at a 1?:?1 ratio in EtOH.
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Journal Name：New Journal of Chemistry
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CAS no.: 89640-58-4
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