Mononuclear lanthanide complexes assembled from a tridentate NNO donor ligand: design of a DyIII single-ion magnet

被引：8

作者：

Kalita, Pankaj ^{[1
]}

Malakar, Amit ^{[1
,4
]}

Goura, Joydeb ^{[1
,3
]}

Nayak, Subhashree ^{[1
]}

Manuel Herrera, Juan ^{[2
]}

Colacio, Enrique ^{[2
]}

Chandrasekhar, Vadapalli ^{[3
,4
]}

机构：

[1] HBNI, Sch Chem Sci, Natl Inst Sci Educ & Res Bhubaneswar, Khurja 752050, Odisha, India

[2] Univ Granada, Dept Quim Inorgan, Fac Ciencias, Ave Fuentenueva S-N, E-18071 Granada, Spain

[3] Indian Inst Technol Kanpur, Dept Chem, Kanpur 208016, Uttar Pradesh, India

[4] Tata Inst Fundamental Res Hyderabad, Hyderabad 500107, Telangana, India

来源：

DALTON TRANSACTIONS | 2019年 / 48卷 / 15期

关键词：

MOLECULE MAGNET; RELAXATION; ANISOTROPY; BARRIERS; BEHAVIOR; FAMILY;

D O I：

10.1039/c9dt00504h

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

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 Ln(III) 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 D-3h symmetry around the Ln(III) centre. Static (dc) and dynamic (ac) magnetic studies have been performed on these complexes. Field-induced single-ion magnet behaviour was observed in the Dy-III analogue with an effective energy barrier and an pre-exponential factor of /k(B) = 68(2) K and (0) = 1.8 x 10(-7) s, respectively.

引用

页码：4857 / 4866

页数：10

共 34 条

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