Frequency-Domain Fourier-Transform Terahertz Spectroscopy of the Single-Molecule Magnet (NEt4)[Mn2(5-Brsalen)2(MeOH)2Cr(CN)6]

被引:49
作者
Dreiser, Jan [1 ,2 ]
Schnegg, Alexander [3 ]
Holldack, Karsten [4 ]
Pedersen, Kasper S. [5 ]
Schau-Magnussen, Magnus [5 ]
Nehrkorn, Joscha [2 ]
Tregenna-Piggott, Philip [7 ]
Mutka, Hannu [6 ]
Weihe, Hogni [5 ]
Bendix, Jesper [5 ]
Waldmann, Oliver [2 ]
机构
[1] Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland
[2] Univ Freiburg, Inst Phys, D-79104 Freiburg, Germany
[3] Helmholtz Zentrum Mat & Energie, Inst Silizium Photovolta, D-12489 Berlin, Germany
[4] Helmholtz Zentrum Mat & Energie, Inst Methoden & Instrumente Forsch Synchrotronstr, D-12489 Berlin, Germany
[5] Univ Copenhagen, Dept Chem, DK-2100 Copenhagen, Denmark
[6] Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France
[7] Paul Scherrer Inst, Neutron Scattering Lab, CH-5232 Villigen, Switzerland
关键词
chromium; EPR spectroscopy; inelastic neutron scattering; magnetic properties; manganese; HIGH-SPIN MOLECULES; (MN2MIII)-M-III(CN)(6) M; CRYSTAL-STRUCTURE; BUILDING-BLOCK; GROUND-STATE; MAGNETIZATION; COMPLEXES; CLUSTERS; ANISOTROPY; BARRIER;
D O I
10.1002/chem.201100581
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
We have investigated the novel single-molecule magnet (NEt4)[Mn-2(5-Brsalen)(2)(MeOH)(2)Cr(CN)(6)] (1; 5-Brsalen= N, N'-ethylenebis(5-bromosalicylidene) iminato anion) using spectroscopic as well as magnetization and susceptibility measurements. Frequency- domain Fourier-transform terahertz electron paramagnetic resonance (FDFT THz-EPR) based on the generation of THz radiation from a synchro-tron in combination with inelastic neutron scattering (INS) allows for the discrimination between intermultiplet and intramultiplet transitions. Together with ac/dc magnetic susceptibility measurements the obtained set of data provides a complete characterization of the lowest energetic magnetic excitations. We find that the new compound 1 exhibits much weaker intermolecular interactions than found in the closely related compound: K[Mn-2(5-Brsalen)(2)(H2O)(2)Cr(CN)(6)] (2). Furthermore, two phonon lines in the vicinity of the magnetic excitations are detected.
引用
收藏
页码:7492 / 7498
页数:7
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