Nitride Cluster Fullerene Spin Shuttle: the role of cluster composition for single molecule magnet behavior

氮化物团簇富勒烯自旋梭：团簇成分对单分子磁体行为的作用

• 批准号: 237010132
• 负责人: Professor Dr. Bernd Büchner, since 11/2013
• 金额: --
• 依托单位: Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden (IFW) e.V.
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2013
• 资助国家: 德国
• 起止时间: 2012-12-31 至 2016-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/237010132?language=en
• 关键词: Nitride; Cluster; Fullerene; Spin; Shuttle

The quest for the best single molecule magnet shall be concerted for the new family of the rare earth (R) containing R3N@C80 nitride cluster endofullerenes. Such carbon cages that contain 3 trivalent rare earth ions and one nitrogen N3- anion may be considered as "spin shuttles" where the spin of the endohedral unit is protected by a diamagnetic carbon shell. Trimetal nitride cluster endofullerenes are known to be very stable and radiation hard, which allows them to be sublimed and self assembled on surfaces, and investigated with x-rays. Based on a recent breakthrough [Westerström et al. (2012)] where extraordinary long spin relaxation times for DySc2N@C80 molecules have been found, IFW Dresden (D) will synthesize and isolate nitride cluster fullerenes, and the group at PSI and UZH (CH) will investigate the magnetic properties by means of x-ray circular dichroism and magnetometry, with special emphasis on longevity of the orientation of the magnetic moments. Based on the "educated" feedback of CH, D will synthesize new molecules out of the many possible combinations of rare earth clusters. The added value for the single molecule magnet community will be the experimental exploration of the new family of molecular magnets which bears unique properties due to its relative simplicity and tunability of the structural parameters.

对最佳单分子磁体的追求应针对含稀土（R）的R3N@C80氮化物簇内富勒烯的新家族进行协调。这种含有3个三价稀土离子和一个氮N3-阴离子的碳笼可以被认为是“自旋梭”，其中内面单元的自旋受到抗磁性碳壳的保护。已知三金属氮化物簇内富勒烯是非常稳定和抗辐射的，这允许它们在表面上升华和自组装，并用X射线研究。基于最近的一项突破[Westerström et al.（2012）]，发现DySc2N@C80分子的自旋弛豫时间非常长，IFW Dresden（D）将合成和分离氮化物簇富勒烯，PSI和UZH（CH）的小组将通过x射线圆二色性和磁力测量研究磁性，特别强调磁矩取向的寿命。根据CH的“有教养的”反馈，D将从稀土团簇的许多可能组合中合成新分子。单分子磁体社区的附加值将是对新的分子磁体家族的实验探索，该分子磁体家族由于其相对简单和结构参数的可调谐性而具有独特的性质。

项目成果

Cluster-size dependent internal dynamics and magnetic anisotropy of Ho ions in HoM2N@C80 and Ho2MN@C80 families (M = Sc, Lu, Y).

HoM2N@C80 和 Ho2MN@C80 族中 Ho 离子的团簇尺寸相关内部动力学和磁各向异性 (M = Sc、Lu、Y)

• DOI: 10.1039/c4nr02864c
• 发表时间: 2014
• 期刊: Nanoscale
• 影响因子: 6.7
• 作者: Y. Zhang;D. Krylov;S. Schiemenz;M. Rosenkranz;R. Westerström;J. Dreiser;T. Greber;B. Büchner;A. A. Popov
• 通讯作者: A. A. Popov

X-ray induced demagnetization of single-molecule magnets

• DOI: 10.1063/1.4891485
• 发表时间: 2014-07-21
• 期刊: APPLIED PHYSICS LETTERS
• 影响因子: 4
• 作者: Dreiser, Jan;Westerstrom, Rasmus;Greber, Thomas
• 通讯作者: Greber, Thomas

Triangular Monometallic Cyanide Cluster Entrapped in Carbon Cage with Geometry-Dependent Molecular Magnetism.

具有几何依赖分子磁性的三角单金属氰化物团簇被捕获在碳笼中

• DOI: 10.1021/jacs.6b09329
• 发表时间: 2016-11-09
• 期刊: Journal of the American Chemical Society
• 影响因子: 15
• 作者: Liu F;Gao CL;Deng Q;Zhu X;Kostanyan A;Westerström R;Wang S;Tan YZ;Tao J;Xie SY;Popov AA;Greber T;Yang S
• 通讯作者: Yang S