Heteroleptic Samarium(III) Chalcogenide Complexes: Opportunities for Giant Exchange Coupling in Bridging σ- and π-Radical Lanthanide Dichalcogenides
作者:Conrad A. P. Goodwin、Benjamin L. L. Réant、Gianni F. Vettese、Jon G. C. Kragskow、Marcus J. Giansiracusa、Ida M. DiMucci、Kyle M. Lancaster、David P. Mills、Stephen Sproules
DOI:10.1021/acs.inorgchem.0c00470
日期:2020.6.1
reducing Sm(II) complex, [Sm(N††)2], where N†† is the bulky bis(triisopropylsilyl)amide ligand, can be oxidized (i) by diphenyldichalcogenides E2Ph2 (E = S, Se, Te) to form the mononuclear series [Sm(N††)2(EPh)] (E = S, 1-S; Se, 1-Se, Te, 1-Te); (ii) S8 or Se8 to give dinuclear [Sm(N††)2}2(μ-η2:η2-E2)] (E = S, 2-S2; Se, 2-Se2); or (iii) with Te═PEt3 to yield [Sm(N††)2}(μ-Te)] (3). These complexes have been
将(N 2 ) 3–•自由基引入多核镧系元素磁体中,通过刺激自旋中心之间的强交换耦合来提高磁滞温度。具有较大供体原子的自由基配体可以促进镧系元素之间更有效的磁耦合,以提供优异的磁性能。在这里,我们表明重硫属元素(S、Se、Te)已准备好满足这些标准。中度还原性 Sm(II) 配合物 [Sm(N †† ) 2 ],其中 N ††是大体积的双(三异丙基甲硅烷基)酰胺配体,可被二苯基二硫属化物 E 2 Ph 2 (E = S, Se, Te) 形成单核系列 [Sm(N †† ) 2 (EPh)] (E = S, 1-S ; Se, 1-Se , Te, 1-Te ); (ii) S 8或 Se 8得到双核 [Sm(N †† ) 2 } 2 (μ-η 2 :η 2 -E 2 )] (E = S, 2-S 2 ; Se, 2-Se 2 );或(iii)与Te=PEt 3产生[Sm(N †† ) 2