7-(Fur-2-yl)benzotriazinyl 1 is the first example of a hydrazyl radical dimer with a thermally accessible triplet state. The triplet exciton (|D| = 0.018 cm−1, |E| = 0.001 cm−1) was observed by solid-state VT-EPR spectroscopy between 5 and 140 K. VT crystallography, DFT calculations and magnetic susceptibility studies reveal a strong temperature dependence of the intra-dimer exchange interaction with J/k ∼ −254 + 0.0007T2.
7-(Fur-2-yl)benzotriazinyl 1 是
肼基二聚体中第一个具有热可触及三重态的例子。固态 VT-EPR 光谱在 5 至 140 K 之间观察到了三重激子(|D| = 0.018 cm-1, |E| = 0.001 cm-1)。VT 晶体学、DFT 计算和磁感应强度研究表明,二聚体内部的交换相互作用具有很强的温度依赖性,J/k ∼ -254 + 0.0007T2。