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Three novel Zn-based coordination polymers (CPs), [Zn(MIPA)] n ( 1 ), {[Zn(MIPA)(4,4'-bipy) 0.5 (H 2 O)]·1.5H 2 O} n ( 2 ), and {[Zn(MIPA)(bpe)]·H 2 O} n ( 3 ) (MIPA = 4-methoxyisophthalic acid, 4,4'-bipy = 4,4'-bipyridine, bpe = (E)-1,2-di(pyridine-4-yl)ethane), were constructed by ligand 4-methoxyisophthalic acid under solvothermal conditions. Compound 1 features a beaded 2D-layer architecture, while compound 2 presents a 2-fold interpenetrating structure with a uninodal three-connected hcb topology. Compound 3 has a 3-fold interpenetrated four-connected dmp topology. Photoluminescence investigations of compound 2 were explored in detail, by which ions were detected, and it was observed to have the highest quenching efficiency toward Al 3+ and S 2- ions. The possible fluorescence quenching mechanisms of 2 toward Al 3+ and S 2- ions were also explored. To the best of our knowledge, this is the first potential dual-responsive luminescent probe based on a Zn(II) coordination polymer for detecting Al 3+ and S 2- ions via a luminescence quenching effect in ethanol.

Three Novel Zn-Based Coordination Polymers: Synthesis, Structure, and Effective Detection of Al3+ and S2− Ions