Coordination polymers are a sub-class of coordination complexes that possess unique opto-electronic properties and hence can be utilized for a wide range of applications such as sensing and photocatalysis. Herein, four new coordination polymers (CPs) with formula [Mn₂(HL)(NMP)(H₂O)₂]_n (1), [Mn₂(HL)(DMA)₂(H₂O)·2DMA]_n (2), [Mn(H₃L)(H₂O)₂]_n (3) and [Mn(H₃L)(H₂O)(4,4′-bipy)]_n (4) (H₅L = 3,5-bis(3,4-dicarboxyphenoxy) benzoic acid and NMP = N-methyl pyrrolidone) were synthesized under hydrothermal conditions and characterized. The single-crystal X-ray analysis revealed a distorted octahedral geometry around Mn(II) in these CPs and that they form an extended hydrogen bonding and π⋯π stacking interaction-assisted network. Thermogravimetric studies revealed that the CPs, 1, 2, 3 and 4, have variable thermal stability in the range of 82–194 °C. All four complexes exhibited optical semiconducting behavior and hence were used as photocatalysts for the photodecomposition of antibiotics, including chloramphenicol (CAP), nitrofurazone (NFZ), ornidazole (ODZ), oxytetracycline (OXY) and sulfamethoxazole (SMT). Among the CPs, CP 2 exhibited an impressive 91.93% degradation of NFZ within 60 min. The plausible photocatalytic mechanism was explained with the assistance of Hirshfeld surface analysis.

中文翻译：

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新型 3,5-双（3,4-二羧基苯氧基）苯甲酸附加 Mn(II) 配位聚合物：合成、表征和抗生素光降解性能

配位聚合物是配位络合物的一个子类，具有独特的光电特性，因此可用于传感和光催化等广泛应用。本文中，四种新型配位聚合物（CP）的结构式为[Mn ₂ (HL)(NMP)(H ₂ O) ₂ ] _n ( 1 )、[Mn ₂ (HL)(DMA) ₂ (H ₂ O)·2DMA] _n ( 2 )、[Mn(H ₃ L)(H ₂ O) ₂ ] _n ( 3 ) 和 [Mn(H ₃ L)(H ₂ O)(4,4′-bipy)] _n ( 4 ) (在水热条件下合成H ₅ L = 3,5-双(3,4-二羧基苯氧基)苯甲酸和NMP = N-甲基吡咯烷酮并进行表征。单晶X射线分析揭示了这些CP中Mn( II )周围扭曲的八面体几何形状，并且它们形成了扩展的氢键和π⋯π堆积相互作用辅助网络。热重研究表明，CP 1、2、3和4在 82–194 ° C范围内具有可变的热稳定性。所有四种配合物均表现出光学半导体行为，因此可用作抗生素光分解的光催化剂，包括氯霉素（CAP）、呋喃西林（NFZ）、奥硝唑（ODZ）、土霉素（OXY）和磺胺甲恶唑（SMT）。在 CP 中，CP 2在 60 分钟内 NFZ 降解率高达 91.93%，令人印象深刻。在赫什菲尔德表面分析的帮助下解释了合理的光催化机制。