Application of real sample analysis and biosensing: Synthesis of new naphthyl derived chemosensor for detection of Al ions.

A new chemosensor (NANH) based on naphthyl moiety was synthesized with good selectivity and sensitivity towards Al ions via the inhibition by operating through dual mechanisms like photo-induced electron transfer (PET) and excited-state intramolecular proton transfer (ESIPT). The synthesized NANH was validated by various techniques such as H, C NMR and mass spectrum. While prominent fluorescent enhancement was observed from the NANH upon binding with Al ions, however, other metal ions have not responded in the emission spectrum. Detection limit and association constant of NANH for Al were calculated as 1.2 × 10 M and 4.09 × 10 M by using fluorescence titration method. Binding ratio (1:1) of NANH with Al ions were proved by Job's plot and DFT studies. Furthermore, aluminium in variety of water samples was determined, and NANH could be used for biosensing of Al in living cells.