Analysis of spin frustration in an FeIII7 cluster using a combination of computational, experimental, and magnetostructural correlation methods
Analysis of spin frustration in an FeIII7 cluster using a combination of computational, experimental, and magnetostructural correlation methods
复制标题
结合计算、实验和磁结构相关方法分析 FeIII7 团簇中的自旋挫败
DOI:
10.1016/j.poly.2022.116045
复制
发表时间:
2022
期刊:
影响因子:
2.6
通讯作者:
Christou, George
中科院分区:
文献类型:
--
作者:
Hale, Ashlyn R.;Aebersold, Lucas E.;Peralta, Juan E.;Foguet-Albiol, Dolos;Abboud, Khalil A.;Christou, George
The synthesis, structure, and magnetic properties are reported for [Fe7O3(O2CtBu)9(mda)3(H2O)3] (1), where mdaH2isN-methyldiethanolamine.1was prepared from the reaction of [Fe3O(O2CtBu)6(H2O)3](NO3) with mdaH2in a 1:∼3 ratio in MeCN. The core of1consists of a central octahedral FeIIIion held within a non-planar Fe6loop by three μ3-O2-and three μ2-RO-arms from the three mda2-chelates. Variable-temperature dc and ac magnetic susceptibility studies revealed dominant antiferromagnetic coupling, leading to a ground state spin ofS=5/2. The ground state was confirmed by a fit of magnetization data collected in the 0.1–7.0 T and 1.8–10.0 K ranges. The four Fe2pairwise exchange parameters (J1-J4) were estimated by independent methods: theoretical calculations using either broken symmetry energy differences (−46.3, −16.2, −3.9, and − 28.1 cm−1, respectively) or Green’s function approximation methods (−41.4, −14.8, −13.2, and − 24.7 cm−1), and a magnetostructural correlation (MSC) previously developed for high nuclearity FeIII/O complexes (−39.5, −13.8, −6.7, and − 23.5 cm−1). Additionally, theJ1-J4obtained from the MSC and theoretical methods were used with the program PHI to both simulateχMTvsTas well as to serve as reasonable input values to fit the experimental data (−41.0, −11.4, −5.0, and − 27.3 cm−1). Analysis of theJijled to identification of the spin frustration effects operative and the resultant spin vector alignments at each FeIIIion, thus allowing for the rationalization of the experimental ground state.
登录
查看更多内容
影响因子:
2.6
作者:
M. Sankaralingam;M. Palaniandavar
通讯作者:
M. Sankaralingam;M. Palaniandavar
DOI:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
S. Datta;Amalia Betancur;Sheng;S. Hill;D. Foguet;R. Bagai;G. Christou
通讯作者:
G. Christou
影响因子:
2.6
作者:
C. Kizas;Constantina Papatriantafyllopoulou;M. Pissas;Y. Sanakis;A. Javed;A. Tasiopoulos;C. Lampropoulos
通讯作者:
C. Lampropoulos
DOI:
--
发表时间:
2016
期刊:
影响因子:
--
作者:
Haifeng Zhang;Jin Zhang;Rui Liu;Yahong Li;Wei Liu;Wu
通讯作者:
Wu
影响因子:
4.6
作者:
Mukherjee, Shreya;Bagai, Rashmi;Christou, George
通讯作者:
Christou, George