Mesomorphic Metallo-Dendrimers Based on the Metal−Metal Bonded Ru2(CO)4 Sawhorse Unit

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• 作者：St&#xe9 ; phane Frein ; Mathieu Auzias ; Aline Sondenecker ; Ludovic Vieille-Petit ; Boris Guintchin ; Natacha Maringa ; Georg Sü ; ss-Fink ; Joaqu&#xed ; n Barber&#xe1 ; Robert Deschenaux
• 刊名：Chemistry of Materials
• 出版年：2008
• 出版时间：February 26, 2008
• 年：2008
• 卷：20
• 期：4
• 页码：1340 - 1343
• 全文大小：1195K
• 年卷期：v.20,no.4(February 26, 2008)
• ISSN：1520-5002

文摘

Dinuclear ruthenium complexes containing the stable metal−metal bonded Ru₂(CO)₄ sawhorse unit with two dendritic carboxylato bridges have been synthesized and characterized. All complexes Ru₂(CO)₄(O₂CR)₂L₂ (R = R¹, R², R³) containing cyanobiphenyl-based poly(arylester) dendrons of first (R¹), second (R²), and third (R³) generation and triphenylphosphine, pyridine, or 4-picoline ligands L proved to be mesomorphic, giving rise to smectic A or smectic A and nematic phases. The supramolecular organization within the smectic A phase is governed by the nature and structure of the mesogenic units and dendritic core. Such materials are of interest for the design of catalytically active anisotropic fluids.