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首页> 外文期刊>Crystal growth & design >Mutual Complexation between π–π Stacked Molecular Tweezers
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Mutual Complexation between π–π Stacked Molecular Tweezers

机译：π-π堆叠分子镊子之间的相互络合

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摘要

Aromatic and heterocyclic molecules which form electronically complementary π–π stacked complexes have recently found extensive application in functional materials, molecular machines, and stimuli-responsive supramolecular polymers. Here we describe the design and synthesis of model compounds that self-assemble through complementary stacking motifs, paralleling those postulated to exist in high-molecular weight, healable, supramolecular polymer systems. Complexation studies using 1H NMR and UV–vis spectroscopy indicated formation of a complementary complex between a π-electron rich dipyrenyl tweezer-motif and a tweezer-like, π-electron deficient bis-diimide. The binding stoichiometry in solution between the chain-folding diimide and the pyrenyl derivative was equimolar with respect to the two binding motifs, and the resulting association constant was measured at Ka = 1200 ± 90 M–1. Single crystal X-ray analysis of this “tweezer–tweezer” complex showed a low-energy conformation of the triethylenedioxy linker within the bis-diimide chain-fold. Interplanar separations of 3.4–3.5 ? were found within the π-stacks, and supporting hydrogen bonds between pyrenyl amide NH groups and diimide carbonyl oxygens were identified.]]>
机译：<！[cdata [ src ='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/cgdefu/2018/cgdefu.2018.18.issue-1/acs.cgd.7b01376/ 20171227 /图像/培养基/ CG-2017-01376X_0004.gif“>形成电子互补π-π堆叠配合物的芳族和杂环分子，最近发现了在功能材料，分子机和刺激响应的超分子聚合物中的广泛应用。在这里，我们描述了通过互补堆叠基序自组装的模型化合物的设计和合成，并将其假设存在于高分子量，可渗透，超分子的聚合物体系中的那些。使用 1 H NMR和UV-Vis光谱的络合研究表明在富含π电子富含二蛋白镊子和镊子的π电子缺陷的双二酰亚胺之间形成互补复合物。在链折叠二酰亚胺和芘基衍生物之间的溶液中的结合化学计量相对于两个结合基序等摩尔，并在 k k a =中测量所得的结合常数。 1200±90 m -1 。该“镊子镊”复合物的单晶X射线分析显示了双二酰亚胺链折叠内三乙二氧合接头的低能量构象。平面分离为3.4-3.5？在π堆叠内被发现，并鉴定了丙烯基酰胺NH基团与二酰亚胺羰基氧基之间的氢键。]]>

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  • 来源
    《Crystal growth & design》 |2018年第1期|共7页
  • 作者

    Matthew P. Parker; Claire A. Murray; Lewis R. Hart; Barnaby W. Greenland; Wayne Hayes; Christine J. Cardin; Howard M. Colquhoun;

  • 作者单位

    Department of Chemistry University of Reading Whiteknights Reading RG6 6AG U.K.;

    Department of Chemistry University of Reading Whiteknights Reading RG6 6AG U.K.;

    Department of Chemistry University of Reading Whiteknights Reading RG6 6AG U.K.;

    Department of Chemistry University of Reading Whiteknights Reading RG6 6AG U.K.;

    Department of Chemistry University of Reading Whiteknights Reading RG6 6AG U.K.;

    Department of Chemistry University of Reading Whiteknights Reading RG6 6AG U.K.;

    Department of Chemistry University of Reading Whiteknights Reading RG6 6AG U.K.;

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  • 正文语种 eng
  • 中图分类 晶体学;
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