pH-dependent self-assembly of copper(II) complexes with a new imidazole-containing polyamine ligand: Synthesis, structure and magnetic property
pH-dependent self-assembly of copper(II) complexes with a new imidazole-containing polyamine ligand: Synthesis, structure and magnetic property
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铜(II)配合物与新型含咪唑多胺配体的pH依赖性自组装：合成、结构和磁性
DOI：
10.1016/j.poly.2008.05.012
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发表时间：
2008-08
期刊：
影响因子：
2.6
通讯作者：
Qi, Zhao-Peng
中科院分区：
文献类型：
--
作者：
Bai, Zheng-Shuai;Cai, Kai;Yuan, Qing;Su, Zhi;Okamura, Taka-aki;Sun, Wei-Yin;Ueyama, Norikazu;Qi, Zhao-Peng
用新型含咪唑多胺配体N1-(2-aminoethyl)-N1-(1H-imidazol-4-ylmethyl)-ethane-1，2-diamine(HL)与铜(ClO4)2·6H2O在不同pH条件下反应，合成了4种铜(II)配合物，并用X-射线单晶衍射法对其结构进行了表征。有趣的是，从质子化配体[H3(HL)][CuCl4]·Cl(1)，双核[Cu2(HL)2Cl](ClO4)3·H2O(2)，一维链状多核{[Cu(L)](ClO4)}n(3)到环状四核配合物[Cu4(L)4](ClO4)4·3CH3CN(4)都具有不同的结构。结果表明，反应pH值对络合物的形成和结构有很大影响。磁性测量表明，Cu(II)中心之间存在反铁磁相互作用，3和4的g=2.0 9，J=−39.0 cm−1和g=2.17，J=−36.8 cm−1。
Four copper(II) complexes were synthesized by reactions of new imidazole-containing polyamine ligand N1-(2-aminoethyl)-N1-(1H-imidazol-4-ylmethyl)-ethane-1,2-diamine (HL) with Cu(ClO4)2·6H2O under different pH and their structures were characterized by X-ray crystallography. Interestingly, the complexes have diverse structures from protonated ligand [H3(HL)][CuCl4]·Cl (1), dinuclear [Cu2(HL)2Cl](ClO4)3·H2O (2), one-dimensional chain polynuclear {[Cu(L)](ClO4)}n(3) to cyclic-tetranuclear [Cu4(L)4](ClO4)4·3CH3CN (4) coordination compounds by varying reaction pH from acidic to basic. The results indicate that the reaction pH has great impact on the formation and structure of the complexes. The magnetic measurements show that there are antiferromagnetic interactions between the Cu(II) centers with g=2.09, J=−39.0cm−1and g=2.17, J=−36.8cm−1for 3 and 4, respectively.
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