Slow relaxation of magnetization for a Tb derivative in a biradical-based lanthanide chain

被引：6
|
作者：
Deng, Xiaochun [1 ]
Ma, Shuqi [1 ]
Zhu, Mei [1 ]
Zhang, Li [1 ]
Lv, Yaohong [1 ]
机构：
[1] Zhejiang Sci Tech Univ, Dept Chem, Hangzhou 310018, Peoples R China
来源：
NEW JOURNAL OF CHEMISTRY | 2020年 / 44卷 / 19期
基金：
中国国家自然科学基金;
关键词：
NITRONYL NITROXIDE BIRADICALS; SINGLE-MOLECULE MAGNETS; CRYSTAL-STRUCTURES; ENERGY-LEVELS; METAL-IONS; COMPLEXES; COMPOUND; EXCHANGE; BEHAVIOR; BLOCKING;
D O I：
10.1039/d0nj00188k
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A series of one-dimensional lanthanide chains [Ln(hfac)(3)(NITPh(4-NIT))](n) (Ln(iii) = Y 1, Gd 2, Tb 3 and Dy 4, hfac = hexafluoroacetylacetonate; NITPh(4-NIT) = 1,4-bis-(l '-oxyl-3 '-oxido-4 ',4 ',5 ',5 '-tetramethyl-4,5-dihydro-1H-imidazol-2 '-yl) benzene) based on a nitronyl nitroxide biradical ligand (NITPh(4-NIT)) has been successfully achieved and characterized. The NITPh(4-NIT) biradicals bridged Ln(hfac)(3) units through their NO groups of two mono-radicals to develop a one-dimensional chain with a 'zig-zag' motif. Magnetic investigation shows that within the biradical ligand, two unpaired electrons are delocalized and expected to be antiferromagnetically coupled. The magnetic behavior of complexes have been analyzed by using an appropriate magnetic model with antiferromagnetic [Ln-biradical] moieties. Moreover, the Tb complex reveals field induced slow magnetic relaxation, arising from the SIM behavior of the Tb(iii) center ion.
引用
收藏
页码：7858 / 7864
页数：7
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