Institute of Fundamental Sciences, Massey University, Private Bag 11 222, Palmerston North, New Zealand.
Dalton Trans. 2011 Dec 7;40(45):12235-41. doi: 10.1039/c1dt10808e. Epub 2011 Aug 30.
The synthesis and spectroscopic analysis of both "metal-only" and anion encapsulated dicopper(II) double helicates utilising a new 1,4-aryl spacer is described. X-Ray crystallographic analysis of the complexes reveal that the aromatic spacer increases rigidity in the complex, yet the complexes are still able to undergo a dramatic "coiling up" to bind anions. Spectroscopic analysis has shown a clear enhancement in the binding strength of SO(4)(2-) over the non-coordinating anions ClO(4)(-), NO(3)(-) and Br(-) which has been attributed to a combination of enhanced rigidity in the complex and an increased electrostatic interaction between the complex and the dianion.
描述了一种新的 1,4-芳基间隔物的“仅含金属”和阴离子包封二铜（II）双螺旋体的合成和光谱分析。 配合物的 X 射线晶体学分析表明，芳族间隔物增加了配合物的刚性，但配合物仍能够进行剧烈的“缠绕”以结合阴离子。 光谱分析表明，SO(4)(2-)的结合强度明显增强，超过了非配位阴离子 ClO(4)(-)、NO(3)(-)和 Br(-)，这归因于配合物的刚性增强和配合物与二阴离子之间的静电相互作用增强的组合。
