Self-Assembled Nickel-4 Supramolecular Squares and Assays for HER Electrocatalysts Derived Therefrom
作者:Xuemei Yang、Christopher R. DeLaney、Kyle T. Burns、Lindy C. Elrod、Wenting Mo、Haley Naumann、Nattamai Bhuvanesh、Michael B. Hall、Marcetta Y. Darensbourg
DOI:10.1021/acs.inorgchem.0c03613
日期:2021.5.17
Solid-state structures find a self-assembled tetrameric nickel cage with carboxylate linkages, [Ni(N2S′O)I(CH3CN)]4 ([Ni-I]40), resulting from sulfur acetylation by sodium iodoacetate of an [NiN2S]22+ dimer in acetonitrile. Various synthetic routes to the tetramer, best described from XRD as a molecular square, were discovered to generate the hexacoordinate nickel units ligated by N2Sthioether, iodide
固态结构发现了具有羧酸盐键[Ni(N 2 S'O)I(CH 3 CN)] 4([ Ni-I ] 4 0)的自组装四聚镍笼,这是由碘乙酸钠将硫磺乙酰化产生的乙腈中制备[NiN 2 S] 2 2+二聚体。发现各种合成四聚体的途径,从XRD最好地描述为分子正方形,产生了由N 2 S硫醚,碘化物和两个羧酸氧连接的六价镍单元,其中一个是与镍中相邻镍单元的桥。 [ Ni-I ] 4 0。通过银离子沉淀去除四种碘化物可得到类似的物种,但具有一个额外的空位配位位点[ Ni-Solv ] +,阳离子,但带有配位的溶剂分子。这也作为四聚体[ Ni-Solv ] 4 4+重结晶。在溶液中,发生离解为(推测的)单体,配位溶剂占据空位[Ni(N 2 S'O)I(solv)] 0,([Ni-I] 0)。由1 H DOSY NMR数据确定的流体力学半径表明,CD 2 Cl 2中也存在单体单元。伊文思方法的磁性值与极性溶剂中的三重态自旋态一致。但是,在CD