Heterometallic cluster-organic frameworks with fascinating architectures and multi-functionality have the potential to be applied in various fields. However, in comparison with p–d, d–d, and d–f heterometallic cluster-organic frameworks, p–f heterometallic cluster-organic frameworks are far less explored even though they possess multiple merits. Herein, two novel isomorphic 4p–4f heterometallic cluster-organic frameworks based on high-nuclear [Ln₁₁Ge₁₂] (Ln = Pr, L1 and Nd, L2) second building units have been successfully synthesized via a hydrothermal approach by using bis(carboxyethylgermanium) sesquioxide (H₂E₂Ge₂O₃, E = –CH₂CH₂COO–). The [Ln₁₁Ge₁₂] cluster is constructed with two Ln-capped Ge₆-rings sandwiching a gear-like [Ln₉] unit. The as-prepared 4p–4f heterometallic [Ln₁₁Ge₁₂] cluster-organic frameworks possess two-dimensional (2D) layered structures. Moreover, the property study reveals the selective and sensitive luminescence sensing of Fe³⁺ with L1, exhibiting its promising application in environmental monitoring.

中文翻译：

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高灵敏的水溶液中Fe3 +发光传感的高核4p-4f杂金属{Ln11Ge12}簇有机骨架的构建

具有引人入胜的架构和多功能性的异金属簇有机框架具有在各个领域中应用的潜力。然而，与p–d，d–d和d–f杂金属簇有机框架相比，p–f杂金属簇有机框架尽管具有多种优点，但研究却很少。在此，已经成功地使用bis（）通过水热方法成功合成了两个基于高核[Ln ₁₁ Ge ₁₂ ]（Ln = Pr，L1和Nd，L2）第二建筑单元的同构4p–4f杂金属簇有机框架。羧乙基锗）倍半氧化物（H ₂ E ₂ Ge ₂ O ₃，E = –CH ₂ CH ₂ COO–）。[Ln ₁₁ Ge ₁₂ ]簇由两个Ln封盖的Ge ₆环构成，中间夹有一个齿轮状[Ln ₉ ]单元。所制备的4p-4f杂金属[Ln ₁₁ Ge ₁₂ ]簇有机骨架具有二维（2D）分层结构。此外，性能研究揭示了具有L1的Fe ³⁺的选择性和灵敏发光传感，在环境监测中具有广阔的应用前景。