Directed synthesis of {Cu2(II)Zn2(II)} and {Cu8(II)Zn8(II)} heterometallic complexes.

Directed synthesis of {Cu2(II)Zn2(II)} and {Cu8(II)Zn8(II)} heterometallic complexes.
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定向合成{Cu2(II)Zn2(II)}和{Cu8(II)Zn8(II)}异金属配合物。

DOI:
10.1039/c5dt03344f
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发表时间:
2015
期刊:
2003)
影响因子:
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通讯作者:
Heras Ojea MJ
Heras Ojea MJ
中科院分区:
--
文献类型:
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作者:
Heras Ojea MJ

文献摘要

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以多齿配体Bis-tris propane为配体,通过两种不同的合成路线,合成了两个新的异金属配合物[Cu_2Zn_2(H_4L)_2(CH_3COO)_2Cl_2]·2.5CH_3OH·0.5H_2O(1)和[Cu_8Zn_8(OH)_8(H_4L)_8](Cl)_2(ClO_4)_6·16H_2O(2(H6 L = 2,2 ′-(丙烷-1,3-二基二亚氨基)双[2-(羟甲基)丙烷-1,3-二醇])。在这里,我们描述的合成,结构和磁性的1,四聚体的形式,在没有碱和2,一个十六核配合物具有显着的双同心环结构,在碱的存在下形成。在这两种化合物中观察到反铁磁耦合的Cu(II)离子,尽管顺磁性金属中心之间的距离很长,由于参与的反磁性Zn(II)离子的磁交换途径。
Two new heterometallic complexes [Cu2Zn2 (H4L) 2 (CH3COO) 2Cl2]· 2.5 CH3OH· 0.5 H2O (1) and [Cu8Zn8 (OH) 8 (H4L) 8](Cl) 2 (ClO4) 6· 16H2O (2) have been synthesised following two different preparative routes, by using the polydentate ligand Bis-tris propane (H6L= 2, 2'-(propane-1, 3-diyldiimino) bis [2-(hydroxymethyl) propane-1, 3-diol]). Herein, we describe the synthesis, structure, and magnetic properties of 1, a tetramer which forms in the absence of base and 2, a hexadecanuclear complex with a remarkable double-concentric ring structure that forms in the presence of base. Antiferromagnetic coupling between Cu (II) ions is observed in both compounds despite the long distances between paramagnetic metal centres, due to the involvement of diamagnetic Zn (II) ions in the magnetic exchange pathway.