Mn6-肟单分子磁体家族中的新结构类型和不同氧化态

New structural types and different oxidation levels in the family of Mn6-oxime single-molecule magnets.

作者信息

Jones Leigh F, Inglis Ross, Cochrane Martyn E, Mason Kevin, Collins Anna, Parsons Simon, Perlepes Spyros P, Brechin Euan K

机构信息

School of Chemistry, Joseph Black Building, West Mains Road, Edinburgh, UK EH9 3JJ.

出版信息

Dalton Trans. 2008 Nov 28(44):6205-10. doi: 10.1039/b811143j. Epub 2008 Sep 25.

DOI:10.1039/b811143j

PMID:18985253

Abstract

The synthesis and magnetic properties of three new members of a family of salicyaldoxime based [Mn6] single-molecule magnets possessing new structural types, core topologies and Mn oxidation state distributions are reported. The isostructural complexes [MnIII6O2(R-sao)6(X)2(EtOH)6] (R = Et, X = Br (1); R = Me, X = I (2)) exhibit single-molecule magnet behaviour with spin Hamiltonian parameters S = 12, g = 1.98 and D = -0.36 cm(-1) in both cases. The hexametallic cluster [MnIII4MnIV2O2(OMe)(4-)(Et-sao)6(MeOH)2].MeOH (3.MeOH) possesses a planar rod-like topology and a mixed valent [MnIV4MnIII2] core, which is unprecedented in this family of [Mn6] SMMs.

摘要

报道了基于水杨醛肟的[Mn6]单分子磁体家族中三个具有新结构类型、核心拓扑结构和锰氧化态分布的新成员的合成及磁性。同构配合物[MnIII6O2(R-萨奥)6(X)2(乙醇)6]（R = 乙基，X = 溴（1）；R = 甲基，X = 碘（2））在两种情况下均表现出单分子磁体行为，其自旋哈密顿参数为S = 12，g = 1.98，D = -0.36 cm(-1)。六金属簇[MnIII4MnIV2O2(OMe)(4-)(乙基-萨奥)6(甲醇)2].甲醇（3.甲醇）具有平面棒状拓扑结构和混合价态的[MnIV4MnIII2]核心，这在该[Mn6]单分子磁体家族中是前所未有的。