Generation of [2×2] Grid Metallosupramolecular Architectures from Preformed Ditopic Bis(acylhydrazone) Ligands and through Component Self‐Assembly
作者:Xiao‐Yu Cao、Jack Harrowfield、Jonathan Nitschke、Juan Ramírez、Adrian‐Mihail Stadler、Nathalie Kyritsakas‐Gruber、Augustin Madalan、Kari Rissanen、Luca Russo、Gavin Vaughan、Jean‐Marie Lehn
DOI:10.1002/ejic.200700235
日期:2007.6
made of the singly deprotonated ligands, grid species appear to be much more readily isolated. With the doubly deprotonated ligands, grid formation is strongly favoured in both the solution and solid states. As a consequence, the grid structures form spontaneously in the presence of a base by self-assembly from their components without need to preform the ditopic ligands. Extensive structural studies
双位双(酰基腙)配体源自碳酰肼与 2-苯基嘧啶-4,6-二甲醛的反应,设计用于与八面体配位过渡金属离子形成网格,根据它们的去质子化程度表现出不同的配位化学。中性酰腙是相对较差的配体,似乎涉及多种不稳定的络合平衡,随溶剂和溶液中的特定金属盐而变化;尽管如此,不同形式的网格复合物可以在固态下分离。尽管仅对单去质子化配体进行了有限的研究,但网格物种似乎更容易分离。使用双重去质子化配体,在溶液和固体状态下都非常有利于网格形成。作为结果,网格结构在碱的存在下通过其组分自组装而自发形成,无需预先形成双位配体。已经进行了广泛的结构研究以建立网格结构并分析中性和带电网格物种可能的超分子相互作用的性质。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)