Influence of Diamagnetic Chelating Ligand (L) on Spin Exchange Couplinh in Heterosoin Chain Complexes
Influence of Diamagnetic Chelating Ligand (L) on Spin Exchange Couplinh in Heterosoin Chain Complexes
复制标题
抗磁性螯合配体（L）对杂链配合物中自旋交换耦合的影响
DOI：
10.1016/j.poly.2013.04.005
复制
发表时间：
2013
期刊：
影响因子：
2.6
通讯作者：
et al.
中科院分区：
文献类型：
--
作者：
K. Murashima;et al.
将联吡啶氨氧基NOpy 2和螯合铜配合物Cu（L）2（L =三氟乙酰丙酮（tfac）、六氟乙酰丙酮（hfac）和十氟庚二酮（dfhd））以1：1的比例混合，得到聚合物配合物[Cu（L）2（NOpy 2）]n; L = tfac（1）、hfac（2）和dfhd（3）。X射线晶体学研究表明，1、2和3的磁性耦合剂NOpy 2与铜离子以反式构型配位，形成一维链状结构.值得注意的是，配合物2显示出独特的晶体结构，分析为吡啶环的顺式和反式构型的静态无序。1、2和3的Cu-Npy键长分别为2.40、2.14和2.02 π，且随着氟取代基数目的增加而变短。在配合物中，氨氧基中心与铜离子发生铁磁性相互作用。自旋交换耦合常数，JCu-NO/kB，为1，2，和3，依赖于抗磁性螯合配体，估计分别为5.7，32，和55 K。
The mixtures of dipyridine aminoxyl,NOpy2, and chelated copper complexes, Cu(L)2; L = trifluoroacetylacetonato (tfac), hexafluoroacetylacetonato (hfac), and decafluoroheptanedionato (dfhd), in 1:1 ratios gave polymeric complexes, formulated as[Cu(L)2(NOpy2)]n; L = tfac (1), hfac (2), and dfhd (3). X-ray crystallography for1,2, and3revealed that the magnetic couplerNOpy2coordinated with the copper ions intransconfigurations to form one-dimensional chain structures. Noticeably, complex2showed a unique crystal structure that was analyzed as a static disorder ofcisandtransconfiguration of the pyridine ring. The bond lengths of Cu–Npyfor1,2, and3, were 2.40, 2.14, and 2.02 Å, respectively and became shorter with increasing the number of fluorine substituents. In the complexes, the aminoxyl centers ferromagnetically interacted with the copper ion. The spin exchange coupling constants,JCu–NO/kB, for1,2, and3, depended on the diamagnetic chelating ligands and were estimated to be 5.7, 32, and 55 K, respectively.