A new Ni(dmit)2-based organic magnetic charge-transfer salt, (m-PO-CONH-N-methylpyridinium)[Ni(dmit)2]·CH3CN
作者:Hiroki Akutsu、Soichi Ito、Tomofumi Kadoya、Jun-ichi Yamada、Shin'ichi Nakatsuji、Scott S. Turner、Yasuhiro Nakazawa
DOI:10.1016/j.ica.2018.07.003
日期:2018.10
Abstract A new Ni(dmit)2-based organic magnetic charge-transfer (CT) salt, (m-PO-CONH-N-methylpyridinium)[Ni(dmit)2]·CH3CN, where PO = 2,2,5,5-Tetramethyl-3-pyrrolin-1-oxyl free radical and dmit = 2-Thioxo-1,3-dithiole-4,5-dithiolate, was obtained, the crystal structure and magnetic properties of which are reported. Magnetic susceptibility of the CT salt obeys a combination of 1D ferromagnetic (1DF)
摘要一种新型的Ni(dmit)2基有机磁性电荷转移盐(m-PO-CONH-N-甲基吡啶鎓)[Ni(dmit)2]·CH3CN,其中PO = 2,2,5,得到了5-四甲基-3-吡咯啉-1-氧基的自由基,dmit = 2-硫代-1,3-二硫代-4,5-二硫代酸酯,并报道了其晶体结构和磁性。CT盐的磁化率服从1D铁磁(1DF)Heisenberg(J1DF = +0.26 K)和Singlet-Triplet(ST)模型(JST = −51.2 K)的组合,且平均场(MF)近似(JMF = −6.7) K),表明PO自由基上的自旋形成一维铁磁链,Ni(dmit)2单阴离子上的自旋在低温下形成自旋二聚体,后者也通过能带计算得到了证实。