用于原位探测多孔有机框架内气体吸附的嵌入式纳米自旋传感器。
Embedded nano spin sensor for in situ probing of gas adsorption inside porous organic frameworks.
作者信息
Zhang Jie, Liu Linshan, Zheng Chaofeng, Li Wang, Wang Chunru, Wang Taishan
机构信息
Beijing National Laboratory for Molecular Sciences, Key Laboratory of Molecular Nanostructure and Nanotechnology, Institute of Chemistry, Chinese Academy of Sciences, Zhongguancun North First Street 2, Beijing, 100190, China.
University of Chinese Academy of Sciences, Beijing, 100049, China.
出版信息
Nat Commun. 2023 Aug 15;14(1):4922. doi: 10.1038/s41467-023-40683-2.
Spin-based sensors have attracted considerable attention owing to their high sensitivities. Herein, we developed a metallofullerene-based nano spin sensor to probe gas adsorption within porous organic frameworks. For this, spin-active metallofullerene, ScC@C was selected and embedded into a nanopore of a pyrene-based covalent organic framework (Py-COF). Electron paramagnetic resonance (EPR) spectroscopy recorded the EPR signals of ScC@C within Py-COF after adsorbing N, CO, CH, CO, CH, and CH. Results indicated that the regularly changing EPR signals of embedded ScC@C were associated with the gas adsorption performance of Py-COF. In contrast to traditional adsorption isotherm measurements, this implantable nano spin sensor could probe gas adsorption and desorption with in situ, real-time monitoring. The proposed nano spin sensor was also employed to probe the gas adsorption performance of a metal-organic framework (MOF-177), demonstrating its versatility. The nano spin sensor is thus applicable for quantum sensing and precision measurements.
基于自旋的传感器因其高灵敏度而备受关注。在此，我们开发了一种基于金属富勒烯的纳米自旋传感器，用于探测多孔有机框架内的气体吸附。为此，选择了具有自旋活性的金属富勒烯ScC@C，并将其嵌入到基于芘的共价有机框架（Py-COF）的纳米孔中。电子顺磁共振（EPR）光谱记录了Py-COF中ScC@C在吸附N₂、CO、CH₄、CO₂、CH₃OH和C₂H₅OH后的EPR信号。结果表明，嵌入的ScC@C的EPR信号的规律性变化与Py-COF的气体吸附性能相关。与传统的吸附等温线测量不同，这种可植入的纳米自旋传感器可以通过原位实时监测来探测气体吸附和解吸。所提出的纳米自旋传感器还被用于探测金属有机框架（MOF-177）的气体吸附性能，证明了其通用性。因此，该纳米自旋传感器适用于量子传感和精密测量。
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