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Dynamic multicomponent hemiaminal assembly

机译:动态多组分血流组合

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摘要

A simple approach to generating in situ metal-templated tris-(2-picolyl)amine-like multicomponent assemblies with potential applications in molecular recognition and sensing is reported. The assembly is based on the reversible covalent association between di-(2-picolyl)amine and aldehydes. Zinc ion is best for inducing assembly among the metal salts investigated, whereas 2-picolinaldehyde is the best among the heterocyclic aldehydes studied. Although an equilibrium constant of 6.6?-10~3 M~(-1) was measured for the assembly formed by 2-picolinaldehdye, di-(2-picolyl)amine, and zinc triflate, the equilibrium constants for other systems are in the 10 ~2 M~(-1) range. X-ray structural analysis revealed that zinc adopts trigonal-bipyramidal geometry within the assembled ligand. The diversity and equilibrium of the assemblies are readily altered by simply changing concentrations, varying components, or adding counteranions.
机译:报告了一种简单的方法来生成原位金属模板的三-(2-picolyl)胺样多组分组件,在分子识别和传感中具有潜在的应用。该组装基于二(2-吡啶甲基)胺与醛之间的可逆共价缔合。在所研究的金属盐中,锌离子最适合诱导组装,而在所研究的杂环醛中,2-吡啶啉醛是最佳的。尽管测得2-吡啶甲酸醛,二-(2-吡啶甲基)胺和三氟甲磺酸锌形成的组装体的平衡常数为6.6?-10〜3 M〜(-1),但其他体系的平衡常数在10〜2 M〜(-1)范围X射线结构分析表明,锌在组装的配体中采用三角双锥体的几何形状。组件的多样性和平衡性很容易通过简单地改变浓度,改变组分或添加抗衡离子来改变。

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