Two new isomerous fluorescent chemosensors for Al3+ based on photoinduced electron transfer

Two new isomerous PET fluorescent chemosensors (L and L′) for Al3+ have been designed and synthesized. The two chemosensors exhibited fluorescence enhancement upon binding Al3+ in CH3CN by PET inhibition processes from both the sulfur and the nitrogen donors to anthracene. Studies reveal that exhibit good selectivity for Al3+ over other metal ions with little interference in CH3CN. In addition, both L and L′ for Al3+ had a lower detection limit.