New types of heterospin complexes from trans-oxamido-bridged copper(ii) binuclear units and nitronyl nitroxide radicals: crystal structure and magnetic characterization | |
Liu, ZL; Lu, ZL; Zhang, DQ; Jiang, ZH; Li, LC; Liu, CM; Zhu, DB | |
刊名 | Inorganic chemistry |
2004-10-18 | |
卷号 | 43期号:21页码:6620-6627 |
ISSN号 | 0020-1669 |
DOI | 10.1021/ic049247d |
通讯作者 | Zhang, dq() |
英文摘要 | Three new heterospin complexes derived from trans-oxamido-bridged copper(ii) binuclear units [cu-2(oxen), oxen = n,n-bis(2-aminoethyl)oxamide] and pyridine-substituted nitronyl nitroxides (o-, m-, and p-pynn) were synthesized and characterized structurally and magnetically. complexes 1 and 2 are four-spin complexes. interestingly, it is found that in complex 3, the cu(ii) ions and m-pynn units are arranged to form 1d double-stranded helical chains, which to the best of our knowledge is the first example of a metal nitronyl nitroxide complex with such a 1d helical structure. the temperature dependencies of the magnetic susceptibilities of 1 and 2 were fitted to the four-spin model with the hamiltonian h = -2js(cu1)s(cu2) - 2j(scu1srad1 - s-cu2 s-rad2), leading to j = -150.5 cm(-1) and j = 47.2 cm(-1) for complex 1 and j = -191.7 cm(-1) and j = -18.9 cm(-1) for complex 2. the temperature dependence of the magnetic susceptibility of complex 3 was approximately simulated with a simple model composed of a dimer of cu(ii) ions and two m-pynn molecules. the best fitting leads to the values of j = -183.0 cm(-1) and zj' = -0.55 cm(-1) for the magnetic exchange of two cu(ii) ions through the oxamide bridge and that between the dimer of cu(ii) ions and two m-pynn molecules, respectively. the antiferromagnetic exchange of oxamido-bridged cu(ii) ions in complexes 1-3 is strong. the strength of such antiferromagnetic interactions is also similar for the three complexes. |
WOS关键词 | MOLECULAR-STRUCTURE ; MANGANESE(II) ; COMPOUND ; BEHAVIOR ; CHAINS ; BIRADICALS ; EXCHANGE ; CLUSTER ; STATE ; SPINS |
WOS研究方向 | Chemistry |
WOS类目 | Chemistry, Inorganic & Nuclear |
语种 | 英语 |
出版者 | AMER CHEMICAL SOC |
WOS记录号 | WOS:000224489100023 |
内容类型 | 期刊论文 |
URI标识 | http://www.corc.org.cn/handle/1471x/2376779 |
专题 | 中国科学院大学 |
通讯作者 | Zhang, DQ |
作者单位 | 1.Chinese Acad Sci, Inst Chem, Ctr Mol Sci, Organ SOlids Lab, Beijing 100080, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100080, Peoples R China 3.Nankai Univ, Dept Chem, Tianjin 300071, Peoples R China |
推荐引用方式 GB/T 7714 | Liu, ZL,Lu, ZL,Zhang, DQ,et al. New types of heterospin complexes from trans-oxamido-bridged copper(ii) binuclear units and nitronyl nitroxide radicals: crystal structure and magnetic characterization[J]. Inorganic chemistry,2004,43(21):6620-6627. |
APA | Liu, ZL.,Lu, ZL.,Zhang, DQ.,Jiang, ZH.,Li, LC.,...&Zhu, DB.(2004).New types of heterospin complexes from trans-oxamido-bridged copper(ii) binuclear units and nitronyl nitroxide radicals: crystal structure and magnetic characterization.Inorganic chemistry,43(21),6620-6627. |
MLA | Liu, ZL,et al."New types of heterospin complexes from trans-oxamido-bridged copper(ii) binuclear units and nitronyl nitroxide radicals: crystal structure and magnetic characterization".Inorganic chemistry 43.21(2004):6620-6627. |
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