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Synthesis and Magnetic Properties of a Dimerized Trinuclear Ni String Complex, [Ni6Cl2(dpa)8](I5)2·0.25I2 (dpa– = 2,2′-Dipyridylamide Anion)
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2021-10-19 , DOI: 10.1021/acs.inorgchem.1c02660
Kentaro Aoki 1 , Kazuya Otsubo 1 , Yukihiro Yoshida 1 , Yojiro Kimura 1 , Kunihisa Sugimoto 2 , Hiroshi Kitagawa 1
Affiliation  

Metal string complexes, linearly aligned transition metal arrays coordinated with the multidentate organic ligands, have gained much attention both in unique electronic/structural properties and in potential applications as conductive molecular nanowires. Here we report on a dimerized NiII trinuclear complex, [Ni6Cl2(dpa)8](I5)2·0.25I2 (dpa = 2,2′-dipyridylamide anion). X-ray structural analysis revealed that two trinuclear moieties are bridged by a Cl anion to form a dimerized string structure. This is the first example of two Ni string complexes that are connected. In the electronic absorption and Raman spectra, characteristic absorption bands and a vibration mode based on the dimer string structure were observed. In the solid state, dimer complexes align in one dimension in an MMMXMMMX (M = metal, X = halogen) manner, leading to the intra- and interdimer antiferromagnetic interactions.

中文翻译:

二聚化三核 Ni 弦络合物的合成和磁性,[Ni6Cl2(dpa)8](I5)2·0.25I2 (dpa– = 2,2'-Dipyridylamide Anion)

金属串配合物是与多齿有机配体配位的线性排列过渡金属阵列,在独特的电子/结构特性和作为导电分子纳米线的潜在应用方面都受到了广泛关注。在这里,我们报告了二聚化的 Ni II三核配合物,[Ni 6 Cl 2 (dpa) 8 ](I 5 ) 2 ·0.25I 2 (dpa = 2,2'-二吡啶基酰胺阴离子)。X 射线结构分析表明,两个三核部分由 Cl 阴离子桥接形成二聚体串结构。这是连接的两个 Ni 弦复合体的第一个例子。在电子吸收和拉曼光谱中,观察到基于二聚体串结构的特征吸收带和振动模式。在固态下,二聚体复合物以 MMMXMMMX(M = 金属,X = 卤素)方式一维排列,导致二聚体内和二聚体间反铁磁相互作用。
更新日期:2021-11-01
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