Barroso Nagore, Andreo Jacopo, Beobide Garikoitz, Castillo Oscar, Luque Antonio, Pérez-Yáñez Sonia, Wuttke Stefan
BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48950, Leioa, Spain.
Organic and Inorganic Chemistry Department, University of the Basque Country, UPV/EHU, Barrio Sarriena s/n, 48950, Leioa, Spain.
Commun Chem. 2023 Jan 5;6(1):4. doi: 10.1038/s42004-022-00799-w.
Nowadays, there are many reliable characterization techniques for the study of adsorption properties in gas phase. However, the techniques available for the study of adsorption processes in solution, rely on indirect characterization techniques that measure the adsorbate concentration remaining in solution. In this work, we present a sensing method based on the magnetic properties of metal-organic frameworks (MOFs) containing paramagnetic metal centres, which stands out for the rapidity, low cost and in situ direct measurement of the incorporated adsorbate within the porous material. To illustrate this sensing technique, the adsorption in solution of four MOFs have been characterized: MIL-88A(Fe), MOF-74(Cu, Co) and ZIF-67(Co). Our simple and efficient method allows the direct determination of the adsorbed mass, as well as the measurement of adsorption isotherm curves, which we hope will greatly advance the study of adsorption processes in solution, since this method is independent of the chemical nature of the adsorbate that often makes its quantification difficult.
如今，有许多可靠的表征技术可用于研究气相中的吸附特性。然而，用于研究溶液中吸附过程的技术依赖于间接表征技术，这些技术测量溶液中剩余的吸附质浓度。在这项工作中，我们提出了一种基于含有顺磁性金属中心的金属有机框架（MOF）磁性的传感方法，该方法以快速、低成本以及原位直接测量多孔材料中掺入的吸附质而脱颖而出。为了说明这种传感技术，我们对四种MOF在溶液中的吸附进行了表征：MIL-88A(Fe)、MOF-74(Cu, Co)和ZIF-67(Co)。我们简单高效的方法能够直接测定吸附质量，以及测量吸附等温线，我们希望这将极大地推动溶液中吸附过程的研究，因为该方法与吸附质的化学性质无关，而吸附质的化学性质常常使其定量变得困难。
