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A new member of a class of rod-like Mn12 single molecule magnets using 2-(pyridine-2-ly)propan-2-ol

机译:使用2-(吡啶-2-ly)丙-2-醇的棒状Mn12单分子磁体的新成员

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This paper reports on the synthesis, structure and magnetic properties of a new type of rod like Mn _(12) metal cluster, [Mn _(12) O _(7) (OH) _(2) (OMe) _(2) (dmhmp) _(4) (O _(2) CPh) _(11) (H _(2) O)] ( 6 ) where the ligand (dmhmpH) is 2-(pyridine-2-yl)propan-2-ol. Compound ( 6 ) was obtained by reacting MnCl _(2) ·4H _(2) O with dmhmpH in the presence of benzoic salt and Et _(3) N. The resulting crystalline material is assigned to the triclinic space group P . Although compound ( 6 ) displays ferromagnetic and antiferromagnetic competition behavior, this does not prevent the molecule from functioning as a single-molecule magnet (SMM). The SMM behavior is evidenced by observing frequency dependent out-of-phase ac signals as well as magnetization hysteresis loops at low temperatures in a micro-SQUID study. A brief comparison between all rod-like Mn _(12) materials is also given in the manuscript.
机译:本文报道了新型棒状Mn _(12)金属团簇[Mn _(12)O _(7)(OH)_(2)(OMe)_(2 )(dmhmp)_(4)(O _(2)CPh)_(11)(H _(2)O)](6)其中配体(dmhmpH)为2-(吡啶-2-基)丙烷- 2-醇。在苯甲酸盐和Et _(3)N存在下,使MnCl _(2)·4H _(2)O与dmhmpH反应,得到化合物(6)。将所得结晶物质分配为三斜晶空间群P。尽管化合物(6)表现出铁磁和反铁磁的竞争行为,但这并不妨碍该分子充当单分子磁体(SMM)。在Micro-SQUID研究中,通过观察频率相关的异相ac信号以及低温下的磁化磁滞回线来证明SMM行为。手稿中还对所有棒状Mn _(12)材料进行了简要比较。

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