Simultaneous luminescence and magnetic control of NaLuF4: Yb3+/Er3+ by introducing NaMnF3 and the application for detecting basic fuchsin

In this work, we reported NaLuF4:Yb3+/Er3+ optical-magnetic bifunctional material by a facile hydrothermal method. The modulation of luminescent and magnetic properties by introducing the secondary phase NaMnF3 was investigated in detail. It was found that the multi-color emissions of the proposed material can be easily controlled due to the energy level match between the Mn and the lanthanide ions. In addition, these microcrystals presented paramagnetic and ferromagnetic property, and the relative intensity showed an opposite variation to the content of NaMnF3 phase. Finally, we briefly discussed the dye detection based on this bifunctional material as fluorescent probe, and the integral intensity ratio of red to green emission was found being sensitive to the concentration of the basic fuchsin (BF), and a detection limit of 0.0015 μg/ml was achieved. These findings can be helpful to understand NaMnF3 induced optical-magnetic property modulation and provide some applications in the biosensing and bioimaging area.