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首页> 外文期刊>Chemistry: A European journal >Topological classification and supramolecular chirality of 2(1)-helical ladder-type hydrogen-bond networks composed of primary ammonium carboxylates: Bundle control in 2(1)-helical assemblies
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Topological classification and supramolecular chirality of 2(1)-helical ladder-type hydrogen-bond networks composed of primary ammonium carboxylates: Bundle control in 2(1)-helical assemblies

机译：由伯羧酸铵组成的2（1）-螺旋梯形氢键网络的拓扑分类和超分子手性：2（1）-螺旋装配中的束缚控制

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The supramolecular chirality of 1D ladder-type hydrogen-bond networks composed of primary ammonium carboxylates was determined based on topological considerations. Chirality in such networks is based on the absolute configuration of the primary ammonium cation, which arises from discrimination between the two oxygen atoms of the carboxylate anion. The configurations of the cations and anions generate topological diversity in the networks, which are classified into six subgroups. In the Cambridge Structural Database, salts based on ladder type 1 constitute over 70% of salts with a 1D-ladder-type network. Ladder type 1, based on a 2(1)-axis, is not super-imposable on its mirror image, which leads to the first definition of right- or left-handedness of 2(1)-helicity on the basis of supramolecular tilt chirality. Helical assemblies of 2(1)-type with triaxial chirality can be assembled in various ways to yield chiral bundles and crystals. On the basis of these considerations, we constructed clay mimic structures with several bundle patterns by connecting the hydrogen-bond networks by using bifunctional molecules. These results open up the possibility of in-depth crystal engineering based on hydrogen-bond topology.
机译：基于拓扑考虑，确定了由伯羧酸铵组成的一维阶梯型氢键网络的超分子手性。在这种网络中的手性是基于伯铵阳离子的绝对构型，该构型是由羧酸根阴离子的两个氧原子之间的区别引起的。阳离子和阴离子的构型在网络中生成拓扑多样性，这些拓扑分为六个子组。在剑桥结构数据库中，基于1型阶梯的盐构成一维梯形网络的盐超过70％。基于2（1）轴的梯子类型1不能在其镜像上叠加，这导致基于超分子倾斜的2（1）螺旋右旋或左旋性的第一个定义手性。具有三轴手性的2（1）型螺旋组件可以各种方式组装，以产生手性束和晶体。基于这些考虑，我们通过使用双功能分子连接氢键网络，构建了具有多个束模式的粘土模拟结构。这些结果为基于氢键拓扑结构的深入晶体工程开辟了可能性。

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