Two new water-stable cadmium(II)-metal organic frameworks (MOFs), namely [Cd₂(L1)(1,4-NDC)₂]_n (1) and [Cd(L2)(1,4-NDC)]_n (2) (L1 = 1,4-bis(benzimidazol-1-yl)-2-butylene, L2 = 1,4-bis(2-methylbenzimidazol-1-yl)-2-butylene and 1,4-H₂NDC = 1,4-naphthalenedicarboxylic acid), were synthesized and characterized. 1 exhibits an unusual 3D framework with the Schläfli symbol of {4²·5·6²·7}{4²·5²·7²}{4²·5³·6²·7³}₂, and 2 is a classical sqc6 network. 1 and 2 display excellent pH and water stability, and the integrity of the frameworks was well maintained at different pH values (pH = 3–13) and after long-term water treatment. 1 is the first dual-function luminescent sensor for sensing acetylacetone and Cr₂O₇²⁻ in aqueous solutions with high sensitivity, selectivity and excellent recyclability. This material is an excellent dual-responsive recyclable luminescent sensor.

中文翻译：

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基于水稳定的Cd（II）-MOF的双响应发光传感器，用于对水溶液中的乙酰丙酮和Cr2O72-进行高度选择性和灵敏的检测

两种新的水稳定性镉（II）-金属有机骨架（MOF），即[Cd ₂（L1）（1,4-NDC）₂ ] _n（1）和[Cd（L2）（1,4-NDC） ] _n（2）（L1 = 1,4-双（苯并咪唑-1-基）-2-丁烯，L2 = 1,4-双（2-甲基苯并咪唑-1-基）-2-丁烯和1,4-合成并表征H ₂ NDC ＝ 1，4-萘二甲酸。1展示了一个不寻常的3D框架，其Schläfli符号为{4 ² ·5·6 ² ·7} {4 ² ·5 ² ·7 ² } {4 ² ·5 ³ ·6 ² ·7³ } ₂和2是经典的sqc6网络。1和2表现出出色的pH值和水稳定性，并且在不同的pH值（pH = 3–13）下以及经过长期水处理后，框架的完整性得到了很好的维护。1是第一款双功能发光传感器，具有高灵敏度，选择性和出色的可回收性，可检测水溶液中的乙酰丙酮和Cr ₂ O ₇ ^2-。这种材料是一种出色的双响应可循环发光传感器。