Slow magnetic relaxation in five-coordinate spin-crossover cobalt(II) complexes

被引：52
作者：
Cui, Hui-Hui [1 ]
Wang, Jing [1 ]
Chen, Xue-Tai [1 ]
Xue, Zi-Ling [2 ]
机构：
[1] Nanjing Univ, Sch Chem & Chem Engn, State Key Lab Coordinat Chem, Nanjing 210023, Jiangsu, Peoples R China
[2] Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA
来源：
CHEMICAL COMMUNICATIONS | 2017年 / 53卷 / 67期
基金：
美国国家科学基金会;
关键词：
SINGLE-MOLECULE MAGNET; ION MAGNET; BEHAVIOR; IRON(II); STATE; 4-COORDINATE; ANISOTROPY; BLOCKING; SYSTEMS; FE(II);
D O I：
10.1039/c7cc04785a
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
We present the first examples of the coexistence of field induced slow magnetic relaxation and spin-crossover observed in five-coordinate cobalt(II) complexes [Co(12-TMC)(CH3CN)](X)(2) (12-TMC = 1,4,7,10-tetramethyl-1,4,7,10-tetraazacyclododecane, X = BF4-, 1; PF6-, 2). The direct-current (dc) magnetic data show a gradual and incomplete spin-crossover at high temperature. 1 and 2 display frequency-and temperature-dependent alternating-current (ac) magnetic susceptibility under an applied dc field of 2500 Oe, which originates from the S = 1/2 spin state of Co(II) ions.
引用
收藏
页码：9304 / 9307
页数：4
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