Three Novel Zn-Based Coordination Polymers: Synthesis, Structure, and Effective Detection of Al<sup>3+</sup> and S<sup>2−</sup> Ions

Three novel Zn-based coordination polymers (CPs), [Zn(MIPA)]<sub>n</sub> (<b>1</b>), {[Zn(MIPA)(4,4&#8242;-bipy)<sub>0.5</sub>(H<sub>2</sub>O)]&#183;1.5H<sub>2</sub>O}<sub>n</sub> (<b>2</b>), and {[Zn(MIPA)(b...

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Bibliographic Details
Main Authors: Yuna Wang, Xiaofeng Zhang, Yanru Zhao, Suoshu Zhang, Shifen Li, Lei Jia, Lin Du, Qihua Zhao
Format: Article
Language:English
Published: MDPI AG 2020-01-01
Series:Molecules
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Online Access:https://www.mdpi.com/1420-3049/25/2/382
Description
Summary:Three novel Zn-based coordination polymers (CPs), [Zn(MIPA)]<sub>n</sub> (<b>1</b>), {[Zn(MIPA)(4,4&#8242;-bipy)<sub>0.5</sub>(H<sub>2</sub>O)]&#183;1.5H<sub>2</sub>O}<sub>n</sub> (<b>2</b>), and {[Zn(MIPA)(bpe)]&#183;H<sub>2</sub>O}<sub>n</sub> (<b>3</b>) (MIPA = 4-methoxyisophthalic acid, 4,4&#8242;-bipy = 4,4&#8242;-bipyridine, bpe = (E)-1,2-di(pyridine-4-yl)ethane), were constructed by ligand 4-methoxyisophthalic acid under solvothermal conditions. Compound <b>1</b> features a beaded 2D-layer architecture, while compound <b>2</b> presents a 2-fold interpenetrating structure with a uninodal three-connected <b>hcb</b> topology. Compound <b>3</b> has a 3-fold interpenetrated four-connected <b>dmp</b> topology. Photoluminescence investigations of compound <b>2</b> were explored in detail, by which ions were detected, and it was observed to have the highest quenching efficiency toward Al<sup>3+</sup> and S<sup>2&#8722;</sup> ions. The possible fluorescence quenching mechanisms of <b>2</b> toward Al<sup>3+</sup> and S<sup>2&#8722;</sup> 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<sup>3+</sup> and S<sup>2&#8722;</sup> ions via a luminescence quenching effect in ethanol.
ISSN:1420-3049