Stahl J, Shlaen E, Singer H, Johrendt D
Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstr. 5-13 (D), 81377 München, Germany.
Dalton Trans. 2018 Mar 6;47(10):3264-3271. doi: 10.1039/c8dt00025e.
Dimensional reduction of superconducting anti PbO-type iron selenide has been achieved by terminating the tetragonal square layers of FeSe tetrahedra by ethylenediamine (en) ligands. We obtained three new structures in the Fe-Se-en system. FeSe(en) contains FeSe single chains bridged via Fe(en) complexes. FeSe(en) has FeSe double strands separated by Fe(en) complexes and free en molecules. FeSe(en) conserves the tetragonal layers of bulk FeSe which are now widely separated by en molecules. Through systematic dilution of the solvent we were able to introduce an additional parameter in solvothermal synthesis and thus have control over the connectivity of the tetrahedra. Additionally, a phase diagram of the Fe-Se-en system is generated by variation of the reaction temperature. The magnetic properties of the FeSe derivatives range from superconductivity and antiferromagnetism to paramagnetism.
通过用乙二胺（en）配体终止FeSe四面体的四方层，实现了超导反PbO型铁硒化物的维度降低。我们在Fe - Se - en体系中获得了三种新结构。FeSe(en)包含通过Fe(en)络合物桥连的FeSe单链。FeSe(en)具有由Fe(en)络合物和游离en分子隔开的FeSe双链。FeSe(en)保留了块状FeSe的四方层，现在这些层被en分子广泛隔开。通过系统地稀释溶剂，我们能够在溶剂热合成中引入一个额外的参数，从而控制四面体的连通性。此外，通过改变反应温度生成了Fe - Se - en体系的相图。FeSe衍生物的磁性范围从超导性、反铁磁性到顺磁性。
