A soft phosphorus atom to "harden" an erbium(iii) single-ion magnet

被引：79

作者：

Chen, Shi-Ming ^{[1
]}

Xiong, Jin ^{[1
]}

Zhang, Yi-Quan ^{[2
]}

Yuan, Qiong ^{[1
]}

Wang, Bing-Wu ^{[1
]}

Gao, Song ^{[1
]}

机构：

[1] Peking Univ, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat Chem & Applicat, Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China

[2] Nanjing Normal Univ, Sch Phys Sci & Technol, Jiangsu Key Lab NSLSCS, Nanjing 210023, Jiangsu, Peoples R China

来源：

CHEMICAL SCIENCE | 2018年 / 9卷 / 38期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

RING-OPENING POLYMERIZATION; MOLECULE MAGNETS; LANTHANIDE COMPLEXES; COORDINATION SPHERE; CRYSTAL-STRUCTURE; DIVALENT THULIUM; LIGANDS; ANISOTROPY; REACTIVITY; BLOCKING;

D O I：

10.1039/c8sc01626g

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Beyond the lanthanide organometallic single-ion magnet (SIM) (Cp*)Er(COT)(1) ([Cp*](-) = pentamethylcyclopentadienide; COT2- = cyclooctatetraenide) that has a good performance, we managed to replace one coordinated carbon atom on the [Cp*](-) ring by a soft phosphorus atom and obtained (Dsp)Er(COT) (CCDC No. ; 1835955; Dsp(-) = 3,4-dimethyl-2,5-bis(trimethylsilyl)phospholyl) whose sandwich structure is reported here for the first time. This substitution results in a remarkable change of magnetic dynamics. It exhibits slow magnetic relaxation under a zero applied direct current (DC) magnetic field with an energy barrier (/k(B)) of 358 K and magnetic hysteresis up to 9 K, both of which are higher than those of (Cp*)Er(COT). With the descended local symmetry of (Dsp)Er(COT), the energy barrier and blocking temperature (T-B) both improve unexpectedly and are among the highest ones in Er(iii)-based single-molecule magnets (SMMs).

引用

页码：7540 / 7545

页数：6

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