论文部分内容阅读
自旋交叉配合物的研究是分子磁化学中的一个重要领域,并已引起人们的普遍关注。近期我们合成了一个新的配体dpq(dpq=dipyrazine犤2,3f:2,3h犦quinoxaline)和新的自旋交叉配合物犤Fe(dpq)2(NCS)2犦·1.5H2O。通过元素分析、红外光谱、质谱、核磁共振、紫外光谱等方法对其结构进行了表征。变温磁化率和穆斯堡尔谱学的研究表明标题化合物是一个新颖的自旋交叉配合物,而且显示出不常见的15K回滞宽度,在降温时伴有一小台阶。通过对比发现,配体的共轭性在自旋交叉配合物中的影响是非常重要的。
Spin-cross complex research is an important area of molecular magnetism, and has aroused widespread concern. Recently, we synthesized a new ligand dpq (dpq = dipyrazine 犤 2,3f: 2,3h 犦 quinoxaline) and a new spin-catered complex 犤 Fe (dpq) 2 (NCS) 2 犦 · 1.5H2O. Its structure was characterized by elemental analysis, infrared spectroscopy, mass spectrometry, nuclear magnetic resonance and ultraviolet spectroscopy. Studies on the susceptibilities and Mossbauer spectroscopy show that the title compound is a novel spin-cross complex and shows an uncommon 15K hysteresis width with a small step in cooling. It is found by comparison that the effect of the conjugation of the ligand in the spin-cross complex is very important.