Construction of lanthanide single-molecule magnets with the “magnetic motif” [Dy(MQ)4]−,Inorganic Chemistry Frontiers

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Construction of lanthanide single-molecule magnets with the “magnetic motif” [Dy(MQ)4]−
Inorganic Chemistry Frontiers ( IF 7 ) Pub Date : 2017-09-19 00:00:00 , DOI: 10.1039/c7qi00393e
Deng-Ping Lyu _{1,

2,

3,

4,

5} , Jie-Yu Zheng _{1,

2,

3,

4,

5} , Quan-Wen Li _{1,

2,

3,

4,

5} , Jun-Liang Liu _{1,

2,

3,

4,

5} , Yan-Cong Chen _{1,

2,

3,

4,

5} , Jian-Hua Jia _{1,

2,

3,

4,

5} , Ming-Liang Tong _{1,

2,

3,

4,

5}

Affiliation

A dinuclear complex (HNEt₃)[Dy₂(MQ)₄(NO₃)₃]·EtOH·H₂O (HMQ = 2-methyl-8-hydroxyquinoline) was prepared and proved to have no observable single-molecule magnet (SMM) behaviour. With increasing NEt₃ in the reaction, two coordinated NO₃⁻ units in the {(NO₃)₃} pocket were replaced by an additional “magnetic motif” [Dy(MQ)₄]⁻. In this way, the unfavourable interactions between the two dysprosiums were diminished and a trinuclear complex [Dy₃(MQ)₈(NO₃)] was obtained, which behaves as an SMM with an efficient energy barrier of 244(21) K for the full temperature range and 150(12) K for the high-temperature region. It is suggested that introduction of a “magnetic motif” is a feasible strategy for modulating the magnetic behaviour of polynuclear systems.

中文翻译：

具有“磁性图案” [Dy（MQ）₄ ]的镧系单分子磁体的构造^-

制备了双核络合物（HNEt ₃）[Dy ₂（MQ）₄（NO ₃）₃ ]·EtOH·H ₂ O（HMQ = 2-甲基-8-羟基喹啉），并证明没有可观察到的单分子磁体（ SMM）的行为。随着网₃在反应中，两个配位NO ₃^-单元在{（NO ₃）₃ }口袋由一个附加的“磁性基序” [镝（MQ）被替换₄ ] ^-。这样，减少了两个之间的不利相互作用，形成了三核复合物[Dy ₃（MQ）₈（NO ₃）]，其表现为SMM，在整个温度范围内的有效能垒为244（21）K，在高温区域的有效能垒为150（12）K。提出引入“磁性基序”是调节多核系统的磁性行为的可行策略。

更新日期：2017-11-08

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