A multidentate tetrazole molecule based on a TPE core, tetrakis[4-(1H-tetrazol-5-yl)phenyl]ethylene (H₄ttpe) with combined advantages of two functional groups, was synthesized by cycloaddition reaction of the corresponding organic benzonitrile derivative and azide salt. Coordination self-assembly of the in situ formed aggregation-induced emission polytetrazole luminogen with cadmium(II) ion produces an unprecedented tetrazolyl-TPE-based microporous cationic metal–organic framework (MOF) with an unusual (4,5,8T14)-connected net of {[Cd₄(H₄ttpe)₂Cl₅]·(N₃)₃}, in which the H₄ttpe serves as the first undeprotonated tetrazole ligand of octa-coordinating bridging mode. We investigate, for the first time, the utilization of the luminescent MOF containing a TPE core decorated with tetrazolyl terminals for explosive detection based on the change in fluorescence intensity, which shows high selectivity and efficiency in fluorescence quenching toward TNP detection in water solution.

中文翻译：

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(4,5,8)-连接阳离子配位聚合物材料作为基于原位生成的 AIE 四唑基-四苯基乙烯衍生物的爆炸化学传感器

通过相应的有机苯甲腈的环加成反应合成了基于TPE核四[4-(1 H-四唑-5-基)苯基]乙烯(H ₄ ttpe)的多齿四唑分子，具有两个官能团的优点衍生物和叠氮化物盐。原位形成的聚集诱导发射聚四唑发光原与镉 (II) 离子的配位自组装产生了前所未有的四唑基-TPE 基微孔阳离子金属有机骨架 (MOF)，具有不寻常的 (4,5,8T14) 连接净{[Cd ₄ (H ₄ ttpe) ₂ Cl ₅ ]·(N ₃ ) ₃ }，其中H ₄ttpe 作为第一个八配位桥接模式的未去质子化的四唑配体。我们首次研究了基于荧光强度的变化，利用包含装饰有四唑基末端的 TPE 核的发光 MOF 进行爆炸物检测，这显示了对水溶液中 TNP 检测的荧光猝灭的高选择性和效率。