Abstract

A series of polymer complexes of Gd(III) and Eu(III) with 3-furancarboxylic (HFur) and 5-nitro-2-furancarboxylic (HNfur) acids differed in the composition and coligands presented by solvent molecules (CH₃OH/C₂H₅OH/H₂O) is synthesized: [Gd(Fur)₃(CH₃OH)(C₂H₅OH)]_n (I), [Gd(Nfur)₃(CH₃OH)₂]_n· CH₃CN (II), [Eu(Fur)₃(C₂H₅OH)]_n (III), and [Eu(Nfur)₃(H₂O)₂]_n·3CH₃CN (IV). According to the X-ray diffraction (XRD) data, all complexes are 1D coordination polymers in which the lanthanide cation has the coordination number 8 (LnO₈) to form the environment as a doubly augmented triangular prism (I, II) or a square antiprism (III, IV). The supramolecular levels of the polymers are stabilized due to intra- and intermolecular hydrogen bonds between the coordinated solvent molecules and O atoms of the chelate-bound anions of the acid and via two types of noncovalent C–H…O and N–O…π interactions that significantly contribute to an additional stabilization of the crystal packings. The biological properties of complexes I, II, and IV are studied with respect to the model nonpathogenic strain Mycolicibacterium smegmatis.

中文翻译：

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Gd3+ 和 Eu3+ 的呋喃甲酸配位聚合物：合成、结构变化和生物学性质

摘要

Gd(III) 和 Eu(III) 与 3-呋喃甲酸 (HFur) 和 5-硝基-2-呋喃甲酸 (HNfur) 的一系列聚合物配合物在组成和溶剂分子 (CH 3 OH/C) 存在的共配体方面_有所不同₂ H ₅ OH/H ₂ O)合成：[Gd(Fur) ₃ (CH ₃ OH)(C ₂ H ₅ OH)] _n ( I )、[Gd(Nfur) ₃ (CH ₃ OH) ₂ ] _n · CH ₃ CN ( II ), [Eu(Fur) ₃ (C ₂ H ₅ OH)] _n (III )和[Eu(Nfur) ₃ (H ₂ O) ₂ ] _n ·3CH ₃ CN( IV )。根据X射线衍射（XRD）数据，所有配合物均为一维配位聚合物，其中镧系阳离子的配位数为8（LnO ₈），形成双增三棱柱（I，II）或正方形的环境反棱镜（III，IV）。由于配位溶剂分子与酸螯合阴离子的 O 原子之间的分子内和分子间氢键以及两种非共价 C–H…O 和 N–O…π ，聚合物的超分子水平得以稳定。相互作用对晶体堆积的额外稳定性有显着贡献。针对模型非致病菌株耻垢分枝杆菌，研究了复合物I、II和IV的生物学特性。