Redox Potentials and HPLC Behavior of Cobalt and Iron Complexes with Pyridylazo Compounds

Analytical Sciences 24 巻 12 号 1575-1580 頁 2008-12 発行
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タイトル ( eng )
Redox Potentials and HPLC Behavior of Cobalt and Iron Complexes with Pyridylazo Compounds
作成者
Yasui Takashi
Ohnishi Takashi
Yamaguchi Masayo
Tamamura Saki
Yamada Hiromichi
Yuchi Akio
収録物名
Analytical Sciences
24
12
開始ページ 1575
終了ページ 1580
抄録
The redox potentials of cobalt and iron complexes with ten pyridylazo compounds, E0ML2 (ML2+/0; M: CoIII/II, FeIII/II; L-: pyridylazo compounds), have been determined in order to explore the difference in their reversed-phase HPLC behavior. The redox potentials of Co complexes were in the range of -0.62 - 0.03 V, while those of Fe complexes were -0.06 - 0.59 V relative to 0.20 V for ferricinium/ferrocene. The redox potentials of both the Co and Fe complexes were linearly correlated to the basicities of the ligands. The correlation was quantitatively explained by a difference in dependence of the stabilities of MIII and MII complexes on the ligand basicities. The complex of [CoIIIL2]+ or [FeIIL2] with any compound injected in the reversed-phase HPLC system was detected without any change in the composition. When [CoIIL2] was injected, only those complexes having the highest potentials of E0CoL2 ≅ 0.0 V were detected as [CoIIL2], while other complexes having lower potentials gave a peak of [CoIIIL2]+. When [FeIIIL2]+ was injected, only complexes having the lowest potentials of E0FeL2 ≅ 0.0 V were detected as [FeIIIL2]+, while others having higher potentials gave a peak of [FeIIL2].
NDC分類
化学 [ 430 ]
言語
英語
資源タイプ 学術雑誌論文
出版者
The Japan Society for Analytical Chemistry
発行日 2008-12
権利情報
2008 © The Japan Society for Analytical Chemistry
出版タイプ Version of Record(出版社版。早期公開を含む)
アクセス権 オープンアクセス
収録物識別子
[ISSN] 0910-6340
[ISSN] 1348-2246
[NCID] AA10500785
[DOI] 10.2116/analsci.24.1575
[DOI] https://doi.org/10.2116/analsci.24.1575