Abstract
Three imine derivatives containing antipyrine moiety viz. A1, A2 and A3 have been synthesized and characterized by SC-XRD analysis. The molecules are weakly fluorescent due to ESIPT process. The A1 and A2 have high affinity as well as selectivity for Al3+ that allow its nano-molar level detection. On the other hand, A3 interacts with both Al3+ and Zn2+ as reflected from the change of emission profiles at two different wavelengths. Such distinctive photo-physical interaction of A3 over A1 and A2 may be elucidated through hard-soft interaction concept. Various spectroscopic techniques have been used to explain the sensing mechanism. DFT studies have been performed to explain and justify experimental findings. The interaction of A3 towards Al3+ and Zn2+ has been utilized to construct a logic gate. Moreover, real water analysis has also been performed.
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