Meso-Helicates with Rigid Angular Tetradentate Ligand: Design, Molecular Structures, and Progress Towards Self-Assembly of Metal鈥揙rganic Nanotubes

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• 作者：Rodrigue Djeda ; Christophe Desmarets ; Lise-Marie Chamoreau ; Yanling Li ; Yves Journaux ; Geoffrey Gontard ; Hani Amouri
• 刊名：Inorganic Chemistry
• 出版年：2013
• 出版时间：November 18, 2013
• 年：2013
• 卷：52
• 期：22
• 页码：13042-13047
• 全文大小：350K
• 年卷期：v.52,no.22(November 18, 2013)
• ISSN：1520-510X

文摘

The self-assembly of two novel metallosupramolecular complexes of the general formulas [L₂M₂(CH₃CN)₄][BF₄]₄ (M = Co, 1a; M = Ni, 1b), where L stands for the tetradentate ligand 3,5-bis[4-(2,2鈥?dipyridylamino)phenylacetylenyl]toluene, is reported together with their molecular structures ascertained by single-crystal X-ray diffraction studies. Complexes 1a and 1b are isostructural and show the formation of dinuclear meso-helicates with the two octahedral metal centers displaying respectively 螖 and 螞 configurations. These meso-helicates display large nanocavities with metal---metal separation distance of >2 nm; furthermore, 蟺鈥撓€-stacking occurs among individual units to form one-dimensional (1D) polymers which further autoassemble in another direction through 蟺鈥撓€ contacts among neighboring chains to generate a two-dimensional (2D) network with regular nanocavities. Our approach might be of interest to prepare metal鈥搊rganic nanotubes via a bottom-up strategy depending on the assembling functional ligand and the geometry of molecular building block.