Modulating Static and Dynamic Magnetizations of Ytterbium(III) Coordination Polymers by Light-Induced Radicals

Light-induced transformation from diamagnetic ligand to paramagnetic radical offers a unique approach to modulating the magnetization dynamics of magnetic compounds. In this study, we present a two-dimensional Yb(III) coordination polymer 1 and its Y(III)-diluted analog 1@Y, along with their lightinduced radical forms, 1a and 1a@Y. Due to the presence of light-induced radicals, the magnetic susceptibility properties (chi MT values) of 1a and 1a@Y featured remarkable 82.3% and 88.9% enhancements, respectively, at room temperature, compared with those of 1 and 1@Y, and were accompanied by an unexpected increase in the effective energy barrier for magnetization dynamics. The magnetization dynamics of 1 and 1a involved both Orbach and Raman processes, while 1@Y and 1a@Y exhibited two Raman processes, indicating that the Orbach process that occurred in 1 and 1a was mainly attributed to the magnetic coupling between Yb(III) ions. This work showcases the potential of light-induced radical transformation for tuning both the static and dynamic magnetic properties of lanthanide coordination polymers.