Kalita Pankaj, Malakar Amit, Goura Joydeb, Nayak Subhashree, Herrera Juan Manuel, Colacio Enrique, Chandrasekhar Vadapalli
School of Chemical Sciences, National Institute of Science Education and Research Bhubaneswar, HBNI, Jatni, Khurda - 752050, Odisha, India.
Dalton Trans. 2019 Apr 9;48(15):4857-4866. doi: 10.1039/c9dt00504h.
The reaction of a tridentate NNO donor ligand, 4-nitro-2-((2-(pyridine-2-yl)hydrazono)methyl)phenol (HL) with lanthanide(iii) nitrates in the presence of triethylamine afforded a new family of neutral mononuclear LnIII complexes [Ln(NO3)(L)2(HOCH3)] (Ln = Gd; (1) Tb; (2), Dy; (3), and Ho (4). The mononuclear complexes were structurally characterized by single crystal X-ray diffraction studies which revealed a spherical tricapped trigonal prism geometry with a pseudo D3h symmetry around the LnIII centre. Static (dc) and dynamic (ac) magnetic studies have been performed on these complexes. Field-induced single-ion magnet behaviour was observed in the DyIII analogue with an effective energy barrier and an pre-exponential factor of Δ/kB = 68(2) K and τ0 = 1.8 × 10-7 s, respectively.
一种三齿NNO供体配体4-硝基-2-((2-(吡啶-2-基)肼基)甲基)苯酚(HL)与硝酸镧(iii)在三乙胺存在下反应，得到了一个新的中性单核LnIII配合物家族[Ln(NO3)(L)2(HOCH3)] (Ln = Gd; (1) Tb; (2), Dy; (3), 和Ho (4)。通过单晶X射线衍射研究对单核配合物进行了结构表征，结果表明在LnIII中心周围具有近似D3h对称性的球形三帽三棱柱几何结构。对这些配合物进行了静态(dc)和动态(ac)磁性研究。在DyIII类似物中观察到场诱导单离子磁行为，其有效能垒和指前因子分别为Δ/kB = 68(2) K和τ0 = 1.8 × 10-7 s。
