Towards nanostructured arrays of single molecule magnets: new Fe19 oxyhydroxide clusters displaying high ground state spins and hysteresis †
作者:Jeremy C. Goodwin、Roberta Sessoli、Dante Gatteschi、Wolfgang Wernsdorfer、Annie K. Powell、Sarah L. Heath
DOI:10.1039/b002135k
日期:——
Ligands of general formula N(CHRCH2OH)(CH2CO2H)2 have been used to capture portions of the Fe(OH)2+ lattice to give particles containing up to nineteen magnetically coupled iron(III) centres. If R = Me or Et, lattices containing only Fe19 clusters result and single crystal X-ray diffraction shows that these are arranged in tilted stacks. These clusters act as single molecule magnets, pointing the way forward to engineering ordered arrays of magnetic particles. The packing of such materials is independent of the counter anion, NO3− or Cl−, used.
通式为N(CHRCH2OH)(CH2CO2H)2的配体已被用于捕获Fe(OH)2+晶格的一部分,从而生成包含多达十九个磁耦合铁(III)中心的颗粒。如果R = Me或Et,则仅产生含有Fe19簇的晶格,单晶X射线衍射显示这些簇以倾斜堆叠的形式排列。这些簇作为单分子磁体,为工程化有序的磁粒子阵列指明了方向。这种材料的包装与所使用的反离子NO3−或Cl−无关。