A new trinuclear mixed-valence Co(II)-Co(III) complex stabilized by a bis(salicylidene) based ligand
文献类型：期刊论文
| 作者 | S. Banerjee ; J. T. Chen ; C. Z. Lu |
| 刊名 | Polyhedron
 |
| 出版日期 | 2007-02 |
| 卷号 | 26期号:3页码:686-694 |
| ISSN号 | 0277-5387 |
| 关键词 | Co-III-Co-II-Co-III trinuclear complex reaction stoichiometry redox behaviour magnetic properties chemical reduction magnetic-properties b-12 models oxidation cobalt(ii) molecules catalysis cu |
| 中文摘要 | The present work deals with a class I mixed valence trinuclear complex [Co-II(mu-OAc)(2)(mu-L)(2)CO2III (NCS)(2)] (1) formed by partial aerial oxidation (H2L = 1,7-bis(2-hydroxyphenyl)-2,6-diazahepta-1,6-diene). The terminal Co-III N3O3 centres exhibit a uniform facial arrangement of both N-3 and O-3 donor sets and the Co-II centre is coordinated to six oxygen atoms. Variable temperature magnetic susceptibility measurement reveals that the intermediate Co(II) paramagnetic centre undergoes a very weak spin exchange (theta = -6.39 K, antiferromagnetic) interaction with the two terminal Co(III) diamagnetic centres over the range 300-2 K. A three line EPR spectra at 4 K was characterized with highly anisotropic g tensors and the one line broad spectra at 300 K indicates the strong influence of temperature on the metal spin states, consistent with a high spin Co(II) complex. Two anodic responses appeared at +0.85 (Co2+ -> Co3+, reversible) and +1.7 V (Co3+-> Co4+, irreversible) corresponding to one and two electron transfer oxidation respectively. Another reversible signal attributed to Co3+ -> Co2+ reduction occurred at -0.5 V, associated with a two electron stoichiometry. Compound 1 reacted with hydrazinc to form a square planar orange-red [Co-II(L)] species, 2. Inter conversion between 1 and 2 involves electron exchange coupled with proton transfer. (c) 2006 Elsevier Ltd. All rights reserved. |
| 语种 | 英语 |
| 公开日期 | 2013-04-01 |
| 源URL | [http://ir.fjirsm.ac.cn/handle/350002/6107]  |
| 专题 | 福建物质结构研究所_中科院福建物质结构研究所_期刊论文 |
| 推荐引用方式 GB/T 7714 | S. Banerjee,J. T. Chen,C. Z. Lu. A new trinuclear mixed-valence Co(II)-Co(III) complex stabilized by a bis(salicylidene) based ligand[J]. Polyhedron,2007,26(3):686-694. |
| APA | S. Banerjee,J. T. Chen,&C. Z. Lu.(2007).A new trinuclear mixed-valence Co(II)-Co(III) complex stabilized by a bis(salicylidene) based ligand.Polyhedron,26(3),686-694. |
| MLA | S. Banerjee,et al."A new trinuclear mixed-valence Co(II)-Co(III) complex stabilized by a bis(salicylidene) based ligand".Polyhedron 26.3(2007):686-694. |
入库方式： OAI收割
来源：福建物质结构研究所
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