Influence of diamagnetic chelating ligand (L) on spin exchange coupling in heterospin chain complexes, [Cu(L)2NOpy2]n

Kensuke Murashima, Satoru Karasawa, Kenji Yoza, Noboru Koga

研究成果: ジャーナルへの寄稿学術誌査読

1 被引用数 (Scopus)

抄録

The mixtures of dipyridine aminoxyl, NOpy2, and chelated copper complexes, Cu(L)2; L = trifluoroacetylacetonato (tfac), hexafluoroacetylacetonato (hfac), and decafluoroheptanedionato (dfhd), in 1:1 ratios gave polymeric complexes, formulated as [Cu(L)2(NOpy 2)]n; L = tfac (1), hfac (2), and dfhd (3). X-ray crystallography for 1, 2, and 3 revealed that the magnetic coupler NOpy 2 coordinated with the copper ions in trans configurations to form one-dimensional chain structures. Noticeably, complex 2 showed a unique crystal structure that was analyzed as a static disorder of cis and trans configuration of the pyridine ring. The bond lengths of Cu-Npy for 1, 2, and 3, were 2.40, 2.14, and 2.02 Å, respectively and became shorter with increasing the number of fluorine substituents. In the complexes, the aminoxyl centers ferromagnetically interacted with the copper ion. The spin exchange coupling constants, JCu-NO/kB, for 1, 2, and 3, depended on the diamagnetic chelating ligands and were estimated to be 5.7, 32, and 55 K, respectively.

本文言語英語
ページ(範囲)188-193
ページ数6
ジャーナルPolyhedron
66
DOI
出版ステータス出版済み - 2013

!!!All Science Journal Classification (ASJC) codes

  • 物理化学および理論化学
  • 無機化学
  • 材料化学

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