Exchange coupling and single molecule magnetism in redox-active tetraoxolene-bridged dilanthanide complexes

被引：88

作者：

Zhang, Peng ^{[1
]}

Perfetti, Mauro ^{[1
,2
]}

Kern, Michal ^{[1
]}

Hallmen, Philipp P. ^{[1
]}

Ungur, Liviu ^{[3
]}

Lenz, Samuel ^{[1
]}

Ringenberg, Mark R. ^{[4
]}

Frey, Wolfgang ^{[5
]}

Stoll, Hermann ^{[6
]}

Rauhut, Guntram ^{[6
]}

van Slageren, Joris ^{[1
]}

机构：

[1] Univ Stuttgart, Inst Phys Chem, Pfaffenwaldring 55, D-70569 Stuttgart, Germany

[2] Univ Copenhagen, Dept Chem, Univ Pk 5, DK-2100 Copenhagen, Denmark

[3] Katholieke Univ Leuven, INPAC Inst Nanoscale Phys & Chem, Theory Nanomat Grp, B-3001 Leuven, Belgium

[4] Univ Stuttgart, Inst Anorgan Chem, Pfaffenwaldring 55, D-70569 Stuttgart, Germany

[5] Univ Stuttgart, Inst Organ Chem, Pfaffenwaldring 55, D-70569 Stuttgart, Germany

[6] Univ Stuttgart, Inst Theoret Chem, Pfaffenwaldring 55, D-70569 Stuttgart, Germany

来源：

CHEMICAL SCIENCE | 2018年 / 9卷 / 05期

关键词：

RARE-EARTH COMPLEXES; HIGH-FIELD EPR; SEMIQUINONATO COMPLEX; URANIUM(III) COMPLEXES; ION MAGNET; RELAXATION; ANISOTROPY; BLOCKING; BEHAVIOR; MAGNETIZATION;

D O I：

10.1039/c7sc04873d

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Tetraoxolene radical-bridged lanthanide SMM systems were prepared for the first time by reduction of the respective neutral compounds. Magnetic measurements reveal the profound influence of the radical center on magnetic behavior. Strong magnetic couplings are revealed in the radical species, which switch on SMM behavior under zero applied field for Dy-III and Tb-III compounds. HFEPR spectra unravel the contributions of the magnetic coupling and the magnetic anisotropy. For Gd-III this results in much more accurate magnetic coupling parameters with respect to bulk magnetic measurements.

引用

页码：1221 / 1230

页数：10

共 61 条

[1] Room temperature quantum coherence in a potential molecular qubit [J].

Bader, Katharina ;

Dengler, Dominik ;

Lenz, Samuel ;

Endeward, Burkhard ;

Jiang, Shang-Da ;

Neugebauer, Petr ;

van Slageren, Joris .

NATURE COMMUNICATIONS, 2014, 5

[2]

Benelli C., 2015, INTRO MOL MAGNETISM, P375

[3] A high-frequency EPR study of frozen solutions of GdIII complexes:: Straightforward determination of the zero-field splitting parameters and simulation of the NMRD profiles [J].

Benmelouka, Meriem ;

Van Tol, Johan ;

Borel, Alain ;

Port, Marc ;

Helm, Lothar ;

Brunel, Louis Claude ;

Merbach, Andre E. .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2006, 128 (24) :7807-7816

[4]

Boudreaux E. A., Theory and Applications of Molecular Paramagnetism

[5] Antiferromagnetic coupling between rare earth ions and semiquinones in a series of 1:1 complexes [J].

Caneschi, A ;

Dei, A ;

Gatteschi, D ;

Poussereau, S ;

Sorace, L .

DALTON TRANSACTIONS, 2004, (07) :1048-1055

[6] Evaluating the magnetic anisotropy in molecular rare earth compounds. Gadolinium derivatives with semiquinone radical and diamagnetic analogues [J].

Caneschi, A ;

Dei, A ;

Gatteschi, D ;

Massa, CA ;

Pardi, LA ;

Poussereau, S ;

Sorace, L .

CHEMICAL PHYSICS LETTERS, 2003, 371 (5-6) :694-699

[7]

Caneschi A, 2000, ANGEW CHEM INT EDIT, V39, P246, DOI 10.1002/(SICI)1521-3773(20000103)39:1<246::AID-ANIE246>3.3.CO

[8]

2-2

[9] Giant field dependence of the low temperature relaxation of the magnetization in a dysprosium(III)-DOTA complex [J].

Car, Pierre-Emmanuel ;

Perfetti, Mauro ;

Mannini, Matteo ;

Favre, Annaick ;

Caneschi, Andrea ;

Sessoli, Roberta .

CHEMICAL COMMUNICATIONS, 2011, 47 (13) :3751-3753

[10] Thermally and light-induced valence tautomeric transition in a dinuclear cobalt-tetraoxolene complex [J].

Carbonera, C ;

Dei, A ;

Létard, JF ;

Sangregorio, C ;

Sorace, L .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2004, 43 (24) :3136-3138

← 1 2 3 4 5 6 7 →