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Synthesis of Carbosilane Dendrimers Containing up to Four Metal Layers

机译:包含多达四个金属层的碳硅烷树枝状聚合物的合成

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Metallodendrimers are an important class of materials with valuable properties and applications in a large number of areas. Herein, we report a highly efficient route for the synthesis of carbosilane dendrimers containing multimetal layers. The procedure involves the use of heteroditopic and tritopic P,N ligands as connectors of the metal layers. The synthetic strategy is based on the ability of the latter ligands to react selectively with the metal complexes[AuClACHTUNGTRENUNG(tht)] (tht:tetrahydrothiophene),[{RuCl2ACHTUNGTRENUNG(pcymene)}2] and [Pd(h3-2-MeC3H4)- ACHTUNGTRENUNG(cod)]ACHTUNGTRENUNG(OTf) (cod: 1,5-cyclooctadiene; OTf: triflate). In this way, metallodendrimers containing trimetallic Ru-Au-Pd or tetrametallic Ru-Au-Au-Pd layers have been formed and characterized.The trimetallic dendrimer 9 can be selectively deconstructed by cleavage of the RuN or AuN bonds by reaction with chloride or iodide salts, respectively.
机译:金属树枝状聚合物是一类重要的材料,在许多领域都具有有价值的特性和应用。本文中,我们报告了一种用于合成含多金属层的碳硅烷树枝状聚合物的高效途径。该过程涉及使用异位和三位P,N配体作为金属层的连接体。合成策略基于后一种配体与金属配合物[AuClACHTUNGTRENUNG(tht)](tht:四氢噻吩),[{RuCl2ACHTUNGTRENUNG(pcymene)} 2]和[Pd(h3-2-MeC3H4)选择性反应的能力。 -ACHTUNGTRENUNG(鳕鱼)] ACHTUNGTRENUNG(OTf)(鳕鱼:1,5-环辛二烯; OTf:三氟甲磺酸盐)。以此方式,已经形成并表征了包含三金属Ru-Au-Pd或四金属Ru-Au-Au-Pd层的金属树枝状聚合物。三金属树枝状聚合物9可以通过与氯化物或碘化物的反应通过RuN或AuN键的断裂而选择性地解构。盐分别。

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