Schiff bases are widely investigated to develop novel chemosensors for selective identification and determination of anions. In this communication, we have taken an old but novel Schiff base, bis(5-nitrosalycilaldehyde)ethylenediamine (5-NO2-Salen, L), as a receptor to investigate the binding interaction with different anions such as F−, I−, Cl−, and Br− using spectrophotometric and computational approaches. Addition of anions accelerated the tautomerization process of L. The enolimine form of L interacts through the phenolic-OH by intermolecular hydrogen bond that intensified the color of the receptor, and a significant hyperchromic shift was observed due to the fluoride anion.
Research on Chemical Intermediates – Springer Journals
Published: Apr 25, 2013
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