Naphthyridine based fluorescent receptors for the recognition of uric acid

Naphthyridine based fluorogenic receptors (R1, R2, R3 and R4) have been synthesised for the recognition of uric acid (UA). The receptors are very useful for potential applications arising from complexation reactions as demonstrated by 1H NMR, UV-vis and fluorescence studies. The association constants (Ka) between the receptors and UA have been reported using UV and fluorescence techniques. The minimisation energy calculations and molecular modelling studies for the host–guest assemblies have been discussed in this context.