repulsion from the coordinating oxygen atom with the shortest DyO distance, the local magnetic moments are oriented almost perpendicular to the Dy3 plane, thus leading to a paramagnetic ground state. CASSCF plus restricted active space state interaction (RASSI) calculations also show that the ground and first excited state of the DyIII ions are separated by approximately 150 and 177 cm−1, for Dy3⋅[BPh4]
两个系列的同构Ç 3 -对称LN 3络合物LN 3 ⋅ [BPH 4 ]和LN 3 ⋅ 0.33 [LN(NO 3)6 ](其中LN III = Gd和DY)已从
氨基双制备(
苯酚)
配体。透视的研究表明,LN III离子由一个连接μ 2 -phenoxo和两个μ 3 -methoxo桥,从而导致双六角锥LN 3 ö 5桥接芯,其中LN III离子表现出双三角棱镜的几何形状。磁化率研究和从头算起的完整活动空间自洽场(CASSCF)计算表明,在基态具有高轴向各向异性的Dy III离子之间的磁耦合反
铁磁非常弱,并且本质上主要是偶极子。为了减少从具有最短的Dy的配位性氧原子的电子斥力 Ó距离,局部磁矩取向几乎垂直于
镝3平面,从而导致顺磁基态。CASSCF加上受限的活动空间状态相互作用(RASSI)计算也表明Dy III的基态和第一激发态离子被大致150和177厘米分离-1,对于
镝3 ⋅ [BPH 4