Phosphine Oxide Ligand Based Tetrahedral CoII Complexes with Field-induced Slow Magnetic Relaxation Behavior Modified by Terminal Ligands

被引：10

作者：

Yang, Rui-Chong ^{[1
]}

Wang, Dan-Ru ^{[1
]}

Liu, Jun-Liang ^{[3
]}

Wang, Yu-Fei ^{[1
,2
]}

Lin, Wei-Quan ^{[1
,2
]}

Leng, Ji-Dong ^{[1
]}

Zhou, Ai-Ju ^{[1
]}

机构：

[1] Guangzhou Univ, Sch Chem & Chem Engn, Inst Clean Energy & Mat, Guangzhou Higher Educ Mega Ctr, 230 Wai Huan Xi Rd, Guangzhou 510006, Guangdong, Peoples R China

[2] Guangzhou Univ, Analyt & Testing Ctr, 230 Wai Huan Xi Rd, Guangzhou 510006, Guangdong, Peoples R China

[3] Sun Yat Sen Univ, Sch Chem, Key Lab Bioinorgan & Synthet Chem, Minist Educ, Guangzhou 510275, Guangdong, Peoples R China

来源：

CHEMISTRY-AN ASIAN JOURNAL | 2019年 / 14卷 / 09期

关键词：

cobalt; ligand field; magnetic anisotropy; phosphine oxide ligand; single-molecule magnets; COBALT-CATALYZED HYDROVINYLATION; SINGLE-ION MAGNET; ZERO-FIELD; 3D; TEMPERATURE; ANISOTROPY; MOLECULES;

D O I：

10.1002/asia.201900280

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Two isostructural mononuclear Co-II complexes, [Co(xantpo)(NCE)(2)] (E=S (1) and O (2); xantpo=9,9-dimethyl-4,5-bis(diphenylphosphoryl) xanthene), supported by a bidentate phosphine oxide ligand are reported. The cobalt complexes exhibit characteristic tetrahedral structures coordinated with two oxygen and two nitrogen atoms. Magnetic property measurements show their similar static magnetic behaviours but very different dynamic magnetic behaviours. Both complexes show field-induced slow magnetic relaxation behaviours, but the relaxation of 2 is much slower than that of 1. Fittings to the magnetic data and ab initio CASSCF calculations reveal significant changes in the zero field splitting (ZFS) parameters (D and E), which can be attributed to the small geometrical changes of the Co ions and the different ligand field strength of the two terminal ligands.

引用

页码：1467 / 1471

页数：5

共 59 条

[1] Shape maps and polyhedral interconversion paths in transition metal chemistry [J].