Nowadays, the development of high-sensitivity oxygen probes and portable detection devices are urgent required. Lanthanide metal-organic frameworks (MOFs), combining the advantages of lanthanide luminescent features and the inherent porosity of MOFs, show great potential for highly sensitive O₂ sensing. At the same time, optical fiber sensors have proven to be a simple and effective detection platform for portable and actual monitoring. In this work, we designed an O₂-sensitive porous lanthanide MOF by elaborately selecting organic ligand with the suitable high triplet-state level. The luminescent intensity of as-synthesized EuNDC (1,4-H₂NDC = 1,4-naphthalenedicarboxylic acid) can be effectively quenched by O₂, giving rise to the most outstanding detection performance than other reported lanthanide MOFs with high sensitivity (93.5% quenched at 1 bar O₂, I₀/I₁₀₀ = 15.4, K_SV = 13.3 bar^-1, LOD = 0.21 mbar), good reversibility, and short response/recovery times (10/70 s). After that, we proposed and developed a reflection type optical fiber sensor by integrating EuNDC and silica fiber in PDMS film for remote, in-field and real-time O₂ monitoring.

如今，迫切需要开发高灵敏度的氧气探针和便携式检测设备。镧系元素金属有机框架（MOF）结合了镧系元素发光特征和MOF固有的孔隙率，显示出高灵敏度O ₂感测的巨大潜力。同时，事实证明，光纤传感器是便携式和实际监控的简单有效的检测平台。在这项工作中，我们通过精心选择具有适当高三重态能级的有机配体，设计了一种对O ₂敏感的多孔镧系元素MOF。合成后的EuNDC（1,4-H ₂ NDC = 1,4-萘二甲酸）的发光强度可以通过O ₂有效地猝灭，比其他报道的镧系金属氧化物金属氧化物半导体具有更高的检测性能，具有最高的灵敏度（93.5％在1 bar O _2下淬灭，I ₀ / I ₁₀₀  = 15.4，K _SV  = 13.3 bar ^-1，LOD = 0.21 mbar），良好可逆性，响应/恢复时间短（10/70 s）。此后，我们提出并开发了一种在PDMS膜中集成EuNDC和二氧化硅纤维的反射型光纤传感器，用于远程，现场和实时O ₂监测。