Rationalizing the effects of amino acid side chain, pyridine, and imidazole on the assembly and reversible disassembly of a octanuclear Cu(II) complex
Rationalizing the effects of amino acid side chain, pyridine, and imidazole on the assembly and reversible disassembly of a octanuclear Cu(II) complex
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DOI：
10.1021/cg070250s
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发表时间：
2007-08
影响因子：
3.8
通讯作者：
Md. Akhtarul Alam;R. Koner;Amrita Das;‡. A. Munirathinum Nethaji;M. Ray
中科院分区：
文献类型：
--
作者：
Md. Akhtarul Alam;R. Koner;Amrita Das;‡. A. Munirathinum Nethaji;M. Ray
本文报道了已报道的咪唑八核铜(II)络合物的可逆解离过程。为了确定这一过程的影响因素，对五种不同核度的铜(II)与不同氨基酸衍生的四齿配体的配合物进行了结构表征。结果表明，铜(II)的配位几何择优、咪唑作为平面配位体的倾向以及氢键对八核配合物的形成和拆解起着重要的作用。提出了一个描述不同氨基酸侧臂、溶剂和外源配体对铜(II)配合物成核性影响的一般方案。在所得到的络合物中，配合物的晶体也显示出多面网络的形成。
This paper reports the observation of a reversible disassembly process for a previously reported octanuclear Cu(II) complex with imidazole. To identify the factors responsible for the process, five Cu(II) complexes of different nuclearity with different amino acid-derived tetradentate ligands were structurally characterized. The results show that the coordination geometry preference of Cu(II), the tendency of imidazole to act as in-plane ligand, and H-bonding played important role in the formation and disassembly of the octanuclear complex. A general scheme describing the effect of different amino acid side arms, solvents, and exogenous ligands on the nuclearity of the Cu(II) complexes has been presented. The crystals of the complexes also showed formation of multifaceted networks in the resulting complexes.