Abstract Two luminescent metal-organic frameworks (LMOFs) of 1 and 2 have been prepared by solvothermal reactions of La(III) ion with organic linker of L (4,4′-dicarboxy-4″-nitrotriphenyl-amine). Single-crystal X-ray crystallography reveals that 1 is 3-D porous architecture with two types of 1-D channels (A and B) which is assembled from 2-D layers intercalating with each other through C-H…π interactions. 2 shows a similar architecture to 1 but with 1-D channel B occupied by the coordinated L linkers, leading to a significant reduction in porosity. Although both 1 and 2 can sensitively and selectively detect Fe3+ ion, the limit of detection (LOD) of 1 is approximately 17 times lower than that of 2, demonstrating the importance of the porosity on the detection sensitivity.

中文翻译：

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发光金属有机骨架的孔隙率对金属阳离子敏感传感的意义

摘要 通过 La(III) 离子与 L (4,4'-dicarboxy-4"-nitrotriphenyl-amine) 有机连接体的溶剂热反应制备了两种发光金属有机骨架 (LMOFs) 1 和 2。单晶 X 射线晶体学显示 1 是具有两种类型的 1-D 通道（A 和 B）的 3-D 多孔结构，它们由通过 CH…π 相互作用相互插入的 2-D 层组装而成。图 2 显示了与 1 类似的结构，但一维通道 B 被协调的 L 连接器占据，导致孔隙率显着降低。尽管 1 和 2 都可以灵敏且选择性地检测 Fe3+ 离子，但 1 的检测限 (LOD) 比 2 低约 17 倍，证明孔隙率对检测灵敏度的重要性。