Spin-crossover (SCO) metal complexes are expected to be widely used in data storage materials, display devices and sensors. Although a lot of spin-crossover photoswitches have been developed, the reversible photomodulation cases that work at room temperature are limited. Herein, a novel cobalt complex o-1-Co(II) wherein the salen unit bridges with bis-diarylethene has been designed as switch to construct “off-on” logic operation at room temperature. The complex o-1-Co(II) displays an abrupt, reversible and hysteretic spin crossover (T_1/2↓=166 K, T_1/2↑=177 K, and ΔT_1/2=11 K) between the high-spin (HS) and low-spin (LS) states. Meanwhile, photocyclization of o-1-Co(II) with UV light produces a photoresponsive closed form c-1-Co(II), which always stays at low-spin without SCO at all. Moreover, the magnetic switching of the complex can also be achieved with redox reactions between Co(II) and Co(III).

自旋交联（SCO）金属配合物有望广泛用于数据存储材料，显示设备和传感器。尽管已经开发了许多自旋交叉光电开关，但在室温下工作的可逆光调制情况受到限制。本文中，一种新型的钴配合物o-1-Co（II）（其中Salen单元与双-二芳基乙烯桥联）已被设计为在室温下构建“开-关”逻辑操作的开关。复杂的o-1-Co（II）在两者之间显示出突然的，可逆的和迟滞的自旋交叉（T _1/2 ↓= 166 K，T _1/2 ↑= 177 K，ΔT _1/2 = 11 K）高旋转（HS）和低旋转（LS）状态。同时，光环化带有紫外线的o-1-Co（II）产生光响应性闭合形式c-1-Co（II），该状态始终处于完全没有SCO的低旋转状态。而且，配合物的磁性转换也可以通过Co（II）和Co（III）之间的氧化还原反应来实现。