A novel photo-excited state with the intermediate spin (S = 1) arising from four unpaired spins and a nearly degenerate quintet (S = 2) excited state were detected for 1, which was designed utilizing the photo-excited triplet spin coupler by taking π-topology into account. The unique triplet state has an interesting electronic structure, which D value is reduced by the antiferromagnetic spin alignment between two radical spins through the excited spin coupler.
在 1 的激发态中检测到了由四个非配对自旋产生的中间自旋(S = 1)新光激发态和一个近乎退化的五重自旋(S = 2)激发态,该激发态是利用π-拓扑结构设计的光激发三重自旋耦合器。独特的三重态具有有趣的电子结构,其 D 值通过激发自旋耦合器在两个自由基自旋之间的反
铁磁自旋排列而降低。