Air-stable redox-active nanomagnets with lanthanide spins radical-bridged by a metal-metal bond

被引：127

作者：

Liu, Fupin ^{[1
]}

Velkos, Georgios ^{[1
]}

Krylov, Denis S. ^{[1
]}

Spree, Lukas ^{[1
]}

Zalibera, Michal ^{[2
]}

Ray, Rajyavardhan ^{[1
,3
]}

Samoylova, Nataliya A. ^{[1
]}

Chen, Chia-Hsiang ^{[1
]}

Rosenkranz, Marco ^{[1
]}

Schiemenz, Sandra ^{[1
]}

Ziegs, Frank ^{[1
]}

Nenkov, Konstantin ^{[1
]}

Kostanyan, Aram ^{[4
]}

Greber, Thomas ^{[4
]}

Wolter, Anja U. B. ^{[1
]}

Richter, Manuel ^{[1
,3
]}

Buechner, Bernd ^{[1
]}

Avdoshenko, Stanislav M. ^{[1
]}

Popov, Alexey A. ^{[1
]}

机构：

[1] Leibniz Inst Solid State & Mat Res IFW Dresden, Helmholtzstr 20, D-01069 Dresden, Germany

[2] Slovak Univ Technol Bratislava, Inst Phys Chem & Chem Phys, Radlinskeho 9, Bratislava 81237, Slovakia

[3] Tech Univ Dresden, Dresden Ctr Computat Mat Sci DCMS, D-01062 Dresden, Germany

[4] Phys Inst Univ Zurich, Winterthurerstr 190, CH-8057 Zurich, Switzerland

来源：

NATURE COMMUNICATIONS | 2019年 / 10卷 / 1期

基金：

瑞士国家科学基金会; 欧盟地平线“2020”;

关键词：

EXCHANGE INTERACTION; MAGNETIC BLOCKING; AB-INITIO; SINGLE; ION; BARRIER; METALLOFULLERENES; GD-2-AT-C79N; RELAXATION; BEHAVIOR;

D O I：

10.1038/s41467-019-08513-6

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Engineering intramolecular exchange interactions between magnetic metal atoms is a ubiquitous strategy for designing molecular magnets. For lanthanides, the localized nature of 4f electrons usually results in weak exchange coupling. Mediating magnetic interactions between lanthanide ions via radical bridges is a fruitful strategy towards stronger coupling. In this work we explore the limiting case when the role of a radical bridge is played by a single unpaired electron. We synthesize an array of air-stable Ln(2)@C-80(CH2Ph) dimetallofullerenes (Ln(2) = Y-2, Gd-2, Tb-2, Dy-2, Ho-2, Er-2, TbY, TbGd) featuring a covalent lanthanide-lanthanide bond. The lanthanide spins are glued together by very strong exchange interactions between 4f moments and a single electron residing on the metal-metal bonding orbital. Tb-2@C-80(CH2Ph) shows a gigantic coercivity of 8.2 Tesla at 5 K and a high 100-s blocking temperature of magnetization of 25.2 K. The Ln-Ln bonding orbital in Ln(2)@C-80(CH2Ph) is redox active, enabling electrochemical tuning of the magnetism.

引用

页数：11

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