Abstract
We have prepared an organic Schiff base, N,N′-bis(o-hydroxybenzylidene) diethylenetriamine as the artificial receptor that exhibits the strong binding capability to guest molecules such as barbituric acid and salicylaldehyde. 1H-NMR spectroscopic titration has been performed to characterize the non-covalent intermolecular interaction between the Schiff base receptor and guest molecules. The reversible binding interactions depending upon the solution pH has been monitored by NMR spectroscopy during the acid titration reaction. In addition, the interaction between the Schiff base and salicylaldehyde was confirmed by COSY and NOE experiments. It is certain that the designed Schiff base molecule acts as molecular tweezers for such molecules as barbituric acid and salicylaldehyde.
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