The selectivity and sensitivity of sensors are of great interest to the materials chemistry community, and a lot of effort is now devoted to improving these characteristics. More specifically, the selective sensing of anions is one of the largest challenges impeding the sensing-research area due to their similar physical and chemical behaviors. In this work, platinum–metalated porphyrin (Pt(II)TMPyP) was successfully encapsulated in a rho-type zeolite-like metal–organic framework (rho-ZMOF) and applied for anion-selective sensing. The sensing activity and selectivity of the MOF-encaged Pt(II)TMPyP for various anions in aqueous and methanolic media were compared to that of the free (nonencapsulated) Pt(II)TMPyP. While the photoinduced triplet-state electron transfer of Pt(II)TMPyP showed a very low detection limit for anions with no selectivity, the Pt(II)TMPyP encapsulated in the rho-ZMOF framework possessed a unique chemical structure to overcome such limitations. This new approach has the potential for use in other complex sensing applications, including biosensors, which require ion selectivity.

中文翻译：

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类沸石金属有机骨架（MOF）吸附Pt（II）-卟啉，用于阴离子选择性传感

传感器的选择性和灵敏度引起了材料化学界的极大兴趣，现在人们为改善这些特性付出了很多努力。更具体地，由于阴离子的选择性的感测具有相似的物理和化学行为，因此它们是阻碍感测研究领域的最大挑战之一。在这项工作中，铂金属化的卟啉（Pt（II）TMPyP）被成功地封装在类rho型沸石金属-有机骨架（rho-ZMOF），并应用于阴离子选择性感测。比较了MOF包裹的Pt（II）TMPyP对水和甲醇介质中各种阴离子的感测活性和选择性与游离（未包封的）Pt（II）TMPyP的感测活性和选择性。虽然Pt（II）TMPyP的光诱导三重态电子转移显示出极低的阴离子检测限，没有选择性，但封装在rho- ZMOF骨架中的Pt（II）TMPyP具有独特的化学结构来克服这些限制。这种新方法有可能用于其他复杂的传感应用中，包括需要离子选择性的生物传感器。