Magnetophotoluminescence Response Triggered by the Triplet State in Metallofullerene

This paper reports the discovery of a magnetophotoluminescence response in metallofullerene Y₃N@C₈₀ triggered by the triplet excited state. In experiments, Y₃N@C₈₀ exhibits magnetic field-dependent (0→±42 T) phosphorescence emission at 4.2 K. Crucially, with increasing magnetic field, the phosphorescence peaks shift to longer wavelengths owing to the Zeeman effect. Further, a nanoring of [9]CPPH is employed to modulate the magnetophotoluminescence response of Y₃N@C₈₀ through host−guest interaction. The circularly polarized phosphorescence spectra of Y₃N@C₈₀ and Y₃N@C₈₀⊂[9]CPPH are investigated to further reveal their magnetophotoluminescence properties using the technique of field-induced circular polarization (FICPO). These results show that metallofullerene Y₃N@C₈₀ with magnetophotoluminescence response has potential applications in spin-related optical devices and quantum technology.