High-field Mossbauer spectroscopy on dinuclear iron(II) spin crossover complexes

被引：3
|
作者：
Bauer, T. O. [1 ]
Schmitz, M. [2 ]
Graf, M. [2 ]
Kelm, H. [2 ]
Krueger, H. -J. [2 ]
Schuenemann, V. [1 ]
机构：
[1] Univ Kaiserslautern, Dept Phys, D-67663 Kaiserslautern, Germany
[2] Univ Kaiserslautern, Dept Chem, D-67663 Kaiserslautern, Germany
来源：
HYPERFINE INTERACTIONS | 2014年 / 226卷 / 1-3期
关键词：
Mossbauer spectroscopy; Spin crossover; Molecular magnetism; Zero-field-splitting;
D O I：
10.1007/s10751-013-0914-6
中图分类号：
O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号：
070203 ; 070304 ; 081704 ; 1406 ;
摘要：
The dinuclear complex [{Fe(L-N4Me2)}(2)(BzImCOO)](ClO4)(2)*0.5(CH3)(2)CO has been investigated by Mossbauer spectroscopy carried out in the temperature range from T = 5 K up to T = 190 K with externally applied magnetic fields of up to B = 5 T. By means of a consistent simulation of all experimental data sets within the Spin Hamiltonian formalism, the zero-field splitting and the rhombicity parameter of the ferrous high-spin site could be determined to be D = 7.2 +/- 0.5 cm (-aEuro parts per thousand 1) and E/D = 0.1 +/- 0.02. The sign of the quadrupole splitting is positive which indicates that the ferrous high-spin site of the dinuclear complex [{Fe(L-N4Me2)}(2)(BzImCOO)]-(ClO4)(2)*0.5(CH3)(2)CO has an electronic ground state with the d (xy) orbital twofold occupied.
引用
收藏
页码：359 / 363
页数：5
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