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, Sc₃C₂@C_80, 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 Sc₃C₂@C₈₀ within Py-COF after adsorbing N₂, CO, CH₄, CO₂, C₃H₆, and C₃H₈. Results indicated that the regularly changing EPR signals of embedded Sc₃C₂@C₈₀ 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.

基于自旋的传感器由于其高灵敏度而引起了广泛的关注。在这里，我们开发了一种基于金属富勒烯的纳米自旋传感器来探测多孔有机框架内的气体吸附。为此，选择自旋活性金属富勒烯 Sc ₃ C ₂ @C ₈₀并将其嵌入芘基共价有机骨架 (Py-COF) 的纳米孔中。电子顺磁共振(EPR)光谱记录了Py-COF中吸附N ₂、CO、CH ₄、CO ₂、C ₃ H ₆和C ₃ H _{8后Sc 3} C ₂ @C ₈₀的EPR信号。_{结果表明，嵌入的Sc 3} C ₂ @C ₈₀规律变化的EPR信号与Py-COF的气体吸附性能相关。与传统的吸附等温线测量相比，这种植入式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用于探测金属有机框架（MOF-177）的气体吸附性能，证明了其多功能性。因此，纳米自旋传感器适用于量子传感和精密测量。