A microporous shp-topology metal–organic framework with an unprecedented high-nuclearity Co10-cluster for iodine capture and histidine detection,Materials Chemistry Frontiers

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A microporous shp-topology metal–organic framework with an unprecedented high-nuclearity Co10-cluster for iodine capture and histidine detection
Materials Chemistry Frontiers ( IF 6.0 ) Pub Date : 2021-3-23 , DOI: 10.1039/d1qm00211b
Kun Wu _{1,

2,

3,

4} , Yong-Liang Huang _{4,

5,

6,

7} , Ji Zheng _{1,

2,

3,

4} , Dong Luo _{1,

2,

3,

4} , Mo Xie _{1,

2,

3,

4} , Yan Yan Li _{1,

2,

3,

4} , Weigang Lu _{1,

2,

3,

4} , Dan Li _{1,

2,

3,

4}

Affiliation

Herein we report the synthesis of a microporous shp-topology metal–organic framework (JNU-200) with 12-connected high-nuclearity Co₁₀-cluster and 4-connected carboxylate ligand, 4,4′,4′′,4′′′-(pyrazine-2,3,5,6-tetrayl)tetrabenzoate (BTTB). The redox potential of Co²⁺/Co³⁺ and the nitrogen-containing π-electron-rich BTTB render JNU-200 an ideal platform for iodine capture. Indeed, the adsorption capacity in iodine vapor can reach up to 1.08 g g⁻¹, comparable to the best-performing MOF materials reported so far. Kinetic studies show that JNU-200 can capture most of the I₂ from an iodine solution of 200 ppm within 48 h, corresponding to 99% removal efficiency, far exceeding many reported MOF materials. Single crystal X-ray diffraction was studied to reveal the structural changes of JNU-200 upon iodine adsorption and the precise location of the trapped iodine. Raman spectra analysis was performed to shed light on the host–guest interactions and the iodine adsorption mechanism. Furthermore, JNU-200 exhibits rapid and facile detection of histidine (His) with a luminescence turn-on response and a yellowish precipitate which was confirmed to be a mixture of cobalt complexes with His.

中文翻译：

具有前所未有的高核Co10簇的微孔shp拓扑金属有机框架，用于碘捕获和组氨酸检测

本文我们报告一个微孔的合成SHP -topology金属-有机骨架（JNU-200与12连接的高核性Co）的₁₀ -cluster和4-连接羧酸配体，4,4'，4''，4'' ′-（吡嗪-2,3,5,6-四基）四苯甲酸酯（BTTB）。Co ²⁺ / Co ³⁺的氧化还原电势和含氮的富含π电子的BTTB使JNU-200成为捕获碘的理想平台。实际上，碘蒸气的吸附能力可以达到1.08 gg ^-1，与迄今为止报道的性能最佳的MOF材料相当。动力学研究表明，JNU-200可以捕获大部分I ₂在48小时之内从200 ppm的碘溶液中去除，相当于99％的去除效率，远远超过了许多报道的MOF材料。研究了单晶X射线衍射，揭示了JNU-200在碘吸附后的结构变化以及捕获的碘的精确位置。进行了拉曼光谱分析，以了解宿主与客体之间的相互作用以及碘的吸附机理。此外，JNU-200表现出对组氨酸（His）的快速，简便检测，具有发光开启响应和淡黄色沉淀，已证实是钴配合物与His的混合物。

更新日期：2021-04-15

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