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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Influence of the coordination geometry on the physicochemical properties of a copper(II)complex with a tailor-made calixarene-based ligand bearing dipyridyl pendants.An ESR,UV-Vis and CV study
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Influence of the coordination geometry on the physicochemical properties of a copper(II)complex with a tailor-made calixarene-based ligand bearing dipyridyl pendants.An ESR,UV-Vis and CV study

机译：配位几何形状对带有量身定制的杯芳烃基配体带有二吡啶基侧基的铜（II）配合物的理化性质的影响.ESR，UV-Vis和CV研究

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摘要

Dipyridyl pendants,suitably attached onto a calix[4]arene fixed in its 1,3-alternate conformation,form stable complexes with copper(II)in acetonitrile.Both the mononuclear and the homobinuclear species([Cu(l)]~(2+)and [Cu_2(l)]~(4+)),previously detected through a UV-Vis investigation,have been studied by ESR,UV-Vis and cyclic voltammetry.ESR and UV-Vis data clearly indicate that in the [Cu(l)]~(2+)species the nitrogen atoms of dipyridyl pendants are tetrahedrally arranged around copper(II).Computer models,optimised through molecular mechanics methods,further support these spectroscopic findings.The tetrahedral arrangement,achieved thanks to the anchoring of the dipyridyl moieties onto the calixarene platform,accounts for the easy reversible reduction of this species.The aspects associated with the reduction-oxidation of the homobinuclear species are also discussed.
机译：双吡啶基侧基适合连接到以其1,3-交替构象固定的杯[4]芳烃上，与乙腈中的铜（II）形成稳定的络合物。单核和同双核物种（[Cu（l）]〜（2 +）和[Cu_2（l）]〜（4+）），以前是通过UV-Vis研究发现的，已通过ESR，UV-Vis和循环伏安法进行了研究。ESR和UV-Vis数据清楚地表明[ Cu（l）]〜（2+）表示二吡啶基侧基的氮原子围绕铜（II）四面体排列。通过分子力学方法优化的计算机模型进一步支持了这些光谱学发现。四面体排列归功于锚固将二吡啶基部分加到杯芳烃平台上，说明该物种易于可逆还原。还讨论了同双核物种还原-氧化相关的方面。

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