Influence of Energy Barriers in Triangular Dysprosium Single-Molecule Magnets through Different Substitutions on a Nitrophenolate-Type Coligand
作者:Wei Chin、Po-Heng Lin
DOI:10.1021/acs.inorgchem.8b01667
日期:2018.10.15
(2-hydroxy-3-methoxyphenyl)methylene(benzoicotino)hydrazine, secondary ligand NP = 2-nitrophenol (2-NP, complex 1), 2,4-dinitrophenol (2,4-DNP, complex 2), and 2,4,6-trinitrophenol (2,4,6-TNP, complex 3), and solvent = 2MeOH·2Et2O (1) and 4MeOH (2 and 3). Magnetic measurements for 1 and 2 revealed observable slow magnetic relaxation behavior with anisotropic energy barriers of 12.18 and 4.96 K, respectively, for
研究了各向异性轴方向对单分子磁体(SMM)的能垒的影响。通过引入具有不同取代基的硝基酚盐(NP)型大肠菌,能垒发生了显着变化。探索了基于三核Dy3O5}苯氧基和甲氧基桥接的三角形基序的三种新型SMM的结构和磁性。所有复合物分享式[镝3(Hhmb)4(μ 3 -OMe)2(OME)(NP)] [镝3(Hhmb)4(μ 3 -OMe)2(NP)]·溶剂·3CL,其中Hhmb =(2-羟基-3-甲氧基苯基)亚甲基(苯甲烟碱)肼,二级配体NP = 2-硝基苯酚(2-NP,络合物1),2,4-二硝基苯酚(2,4-DNP,络合物2)和2,4,6-三硝基苯酚(2,4,6-TNP,络合物3)和溶剂= 2MeOH·2Et 2 O(1)和4MeOH(2和3)。1和2的磁测量结果显示,对于SMM,各向异性能垒分别为12.18和4.96 K,可观察到的慢磁弛豫行为,在复合物3中仅观察到异相磁化率χ''峰的尾部。