Ako Ayuk M, Lan Yanhua, Hampe Oliver, Cremades Eduard, Ruiz Eliseo, Anson Christopher E, Powell Annie K
Institut für Anorganische Chemie, Karlsruhe Institute of Technology, Engesserstr. 15, D-76131, Karlsruhe, Germany.
Chem Commun (Camb). 2014 Jun 4;50(44):5847-50. doi: 10.1039/c4cc01264j.
Experimental and theoretical studies indicate that achieving the maximum possible ground spin state of ST = 83/2 for the mixed-valent Mn19 coordination cluster is insensitive to replacement of its eight μ3-N3 ligands by μ3-Cl, μ3-Br, μ3-OH or μ3-OMe, substantiating that the ferromagnetic interactions are indeed mediated mainly by the internal (μ4-O) ligands. The robustness of the inorganic {Mn(III)12Mn(II)7(μ4-O)8} core is clear from the molecular structure and ESI-MS studies have shown that the structure of the Mn19 aggregate, and also of its Mn18Y analogue, are stable beyond the solid state.
实验和理论研究表明，对于混合价态的Mn19配位簇，将其八个μ3-N3配体替换为μ3-Cl、μ3-Br、μ3-OH或μ3-OMe，对实现ST = 83/2的最大可能基态自旋态不敏感，这证实了铁磁相互作用确实主要由内部（μ4-O）配体介导。从分子结构可以清楚地看出无机{Mn(III)12Mn(II)7(μ4-O)8}核心的稳定性，电喷雾电离质谱（ESI-MS）研究表明，Mn19聚集体及其Mn18Y类似物的结构在固态之外也是稳定的。
