Two new Cd^II MOFs, namely, two‐dimensional (2D) poly[[[μ₂‐1,4‐bis(1H‐benzimidazol‐1‐yl)butane](μ₂‐heptanedioato)cadmium(II)] tetrahydrate], {[Cd(C₇H₁₀O₄)(C₁₈H₁₈N₄)]·4H₂O}_n or {[Cd(Pim)(bbimb)]·4H₂O}_n (1), and 2D poly[diaqua[μ₂‐1,4‐bis(1H‐benzimidazol‐1‐yl)butane](μ₄‐decanedioato)(μ₂‐decanedioato)dicadmium(II)], [Cd₂(C₁₀H₁₆O₄)₂(C₁₈H₁₈N₄)(H₂O)₂]_n or [Cd(Seb)(bbimb)_0.5(H₂O)]_n (2), have been synthesized hydrothermally based on the 1,4‐bis(1H‐benzimidazol‐1‐yl)butane (bbimb) and pimelate (Pim²⁻, heptanedioate) or sebacate (Seb²⁻, decanedioate) ligands. Both MOFs were structurally characterized by single‐crystal X‐ray diffraction. In 1, the Cd^II centres are connected by bbimb and Pim²⁻ ligands to generate a 2D sql layer structure with an octameric (H₂O)₈ water cluster. The 2D layers are further connected by O—H…O hydrogen bonds, resulting in a three‐dimensional (3D) supramolecular structure. In 2, the Cd^II centres are coordinated by Seb²⁻ ligands to form binuclear Cd₂ units which are linked by bbimb and Seb²⁻ ligands into a 2D hxl layer. The 2D layers are further connected by O—H…O hydrogen bonds, leading to an 8‐connected 3D hex supramolecular network. IR and UV–Vis spectroscopy, thermogravimetric analysis and solid‐state photoluminescence analysis were carried out on both MOFs. Luminescence sensing experiments reveal that both MOFs have good selective sensing towards Fe³⁺ in aqueous solution.

中文翻译：

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1,4-双（1H-苯并咪唑-1-基）丁烷和柔性二羧酸酯配体的两个新的CdII MOF：发光感应Fe3 +

两个新的镉^II的MOF，即，二维（2D）聚[[[μ ₂ -1,4-双（1- ħ苯并咪唑-1-基）丁烷]（μ ₂ -heptanedioato）镉（II）]四水合物]，{[Cd（C ₇ H ₁₀ O ₄）（C ₁₈ H ₁₈ N ₄）]·4H ₂ O} _n或{[Cd（Pim）（bbimb）]·4H ₂ O} _n（1），和2D聚[二水[μ ₂ -1,4-双（1- ħ苯并咪唑-1-基）丁烷]（μ ₄ -decanedioato）（μ ₂ -decanedioato）dicadmium（II）]，[CD ₂（C₁₀ H ₁₆ O ₄）₂（C ₁₈ H ₁₈ N ₄）（H ₂ O）₂ ] _n或[Cd（Seb）（bbimb）_0.5（H ₂ O）] _n（2）是基于水热法合成的1,4-双（1 H-苯并咪唑-1-基）丁烷（bbimb）和庚二酸酯（Pim ^2-，庚二酸酯）或癸二酸酯（Seb ^2-，癸二酸酯）配体。两种MOF的结构均通过单晶X射线衍射表征。在1中，CD ^II中心通过bbimb和Pim ^2-配体连接以生成具有八聚（H ₂ O）₈水簇的2D sql层结构。二维层通过OH-H氢键进一步连接，从而形成三维（3D）超分子结构。在2中，Cd ^II中心由Seb ^2-配体协调形成双核Cd ₂单元，该单元通过bbimb和Seb ^2-配体连接成2D hxl层。2D层进一步通过OH-O氢键连接，从而形成一个8连接的3D六角形超分子网络。两种MOF均进行了IR和UV-Vis光谱，热重分析和固态光致发光分析。发光传感实验表明，两种MOF都对水溶液中的Fe ³⁺具有良好的选择性传感。