ABSTRACT Two new Sulfur-containing cadmium(II) coordination polymers {[Cd(HL)2](bpp)}n (1) and {[Cd(L)(bpp)(H2O)]}n (2) (H2L = methyl-3-hydroxy-5-carboxy-2-thiophenecarboxylate, and bpp = 1,3-bis(4-pyridyl)propane) have been synthesized under different pH conditions and structurally characterized by the single-crystal X-ray diffraction and other physicochemical techniques. Structural analyses reveal that compound 1 exhibits a 1D double chain structure based upon dimeric [Cd2(COO)2] subunit. Compound 2 features a 3D network which can be rationalized as a 3-fold 4-connected dia net. It is shown that the pH plays a crucial role in the formation of the resulting structures. Furthermore, solid photoluminescent properties of the two compounds make them potentially useful photoactive materials. GRAPHICAL ABSTRACT

中文翻译：

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pH 相关的两种 Cd(II) 配位结构与甲基-3-羟基-5-羧基-2-噻吩羧酸酯和 1,3-双(4-吡啶基)丙烷混合配体：合成、晶体结构和光致发光特性

摘要 两种新型含硫镉 (II) 配位聚合物 {[Cd(HL)2](bpp)}n (1) 和 {[Cd(L)(bpp)(H2O)]}n (2) (H2L = 3-羟基-5-羧基-2-噻吩羧酸甲酯和bpp = 1,3-双(4-吡啶基)丙烷)已在不同pH条件下合成，并通过单晶X射线衍射和其他结构表征物理化学技术。结构分析表明，化合物 1 表现出基于二聚体 [Cd2(COO)2] 亚基的一维双链结构。化合物 2 具有 3D 网络，可以将其合理化为 3 重 4 连接的 dia 网络。结果表明，pH 在所得结构的形成中起着至关重要的作用。此外，这两种化合物的固体光致发光特性使其成为潜在有用的光活性材料。图形概要