A novel zinc(II) metal-organic framework (MOF) {[(CH₃)₂NH₂]₂ [Zn₅ (TDA)₄ (TZ)₄]^.4DMF}_n (1) (H₂TDA = thiophene-2,5-dicarboxylic acid and HTZ = 1H-1,2,4-Triazole) based on Zn₅(COO)₂ (TZ)₄ pentametallic clusters and thiophene-2,5-dicarboxylic acid was synthesized and structurally characterized via the mixed-ligand strategy. This MOF exhibits a uninodal 6-connected anionic framework with pcu topology and shows solvent stability. Post-functionalization via cation exchange of 1 with Eu³⁺ and Tb³⁺ afforded two lanthanide (III) functionalized MOFs: Eu³⁺@1 and Tb³⁺@1. 1 as well as Eu³⁺@1 and Tb³⁺@1 were utilized as a highly selective and sensitive turn-off luminescent sensors for detecting aniline, benzaldehyde in DMF and Cr₂O₇²⁻, CrO₄²⁻ in water with low detection limits. More importantly, it is rather rare in MOF-based luminescent probes that 1 and its lanthanide (III) post-functionalized materials (Eu³⁺@1 and Tb³⁺@1) can detect aniline, benzaldehyde, Cr₂O₇²⁻ and CrO₄²⁻. Furthermore, the sensitivity of 1 as luminescent probes for detecting aniline and benzaldehyde could be improved via post-functionalization with Eu³⁺ ions.

新型锌（II）金属-有机骨架（MOF）{[（（CH ₃）₂ NH ₂ ] ₂ [Zn ₅（TDA）₄（TZ）₄ ] ^。基于Zn ₅（COO）₂（TZ）₄五金属簇和噻吩的4DMF} _n（1）（H ₂ TDA =噻吩-2,5-二羧酸和HTZ = 1 H -1,2,4-三唑）合成了2，5-二羧酸，并通过混合配体策略对其结构进行了表征。该MOF表现出具有pcu的单链6连接阴离子框架拓扑结构并显示出溶剂稳定性。通过与Eu ³⁺和Tb ³⁺进行阳离子交换1进行后官能化，得到两个镧系元素（III）官能化的MOF：Eu ³⁺ @ 1和Tb ³⁺ @ 1。1以及Eu ³⁺ @ 1和Tb ³⁺ @ 1被用作高选择性和灵敏的关断发光传感器，用于检测DMF中的苯胺，苯甲醛和Cr ₂ O ₇ ^2-，CrO ₄ ^2-在检测限较低的水中。更重要的是，在基于MOF的发光探针中很少见1及其后官能化的镧系元素（III）（Eu ³⁺ @ 1和Tb ³⁺ @ 1）可以检测苯胺，苯甲醛，Cr ₂ O ₇ ^2-和CrO ₄ ^2-。此外，通过用Eu ³⁺离子进行后官能化可以提高1作为发光探针检测苯胺和苯甲醛的灵敏度。