Spin-State Manipulation in a Luminescent Diradical Polymer
Shengjie Wang, Xing Wang, Junshuai Ding, Zihao Zhu, Jingmin Wang, Jingmin Wang, Li Shen, Alim Abdurahman, Geyu Lu, Jianpu Wang, Jianpu Wang, Qiming Peng
Abstract
Controlling the spin states to modulate their optical properties is crucial for spintronics and emerging quantum technologies. Open-shell luminescent diradicals are promising candidates for achieving this goal due to the independent spins. However, achieving spin-optical modulation in traditional diradicals still faces significant challenges owing to low luminescence efficiency and inevitable aggregate effects. In this study, we first achieved efficient luminescence of a diradical by suspending luminescent diradicals on a polymer main chain. The resulting diradical polymer exhibits a high photoluminescence efficiency of 44.0% in the condensed state along with excellent photostability. Most importantly, we have demonstrated successful spin-state manipulation through temperature control and application of a magnetic field. These findings open up new avenues for spin-optical modulation based on luminescent diradical materials, providing important guidance for the development spin-optoelectronics.