Reduced Graphene Oxide-Immobilized Tris(bipyridine)ruthenium(II) Complex for Efficient Visible-Light-Driven Reductive Dehalogenation Reaction

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• 作者：Xiaoyan Li ; Zhongkai Hao ; Fang Zhang ; Hexing Li
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：May 18, 2016
• 年：2016
• 卷：8
• 期：19
• 页码：12141-12148
• 全文大小：437K
• 年卷期：0
• ISSN：1944-8252

文摘

A sodium benzenesulfonate (PhSO₃Na)-functionalized reduced graphene oxide was synthesized via a two-step aryl diazonium coupling and subsequent NaCl ion-exchange procedure, which was used as a support to immobilize tris(bipyridine)ruthenium(II) complex (Ru(bpy)₃Cl₂) by coordination reaction. This elaborated Ru(bpy)₃-rGO catalyst exhibited excellent catalytic efficiency in visible-light-driven reductive dehalogenation reactions under mild conditions, even for ary chloride. Meanwhile, it showed the comparable reactivity with the corresponding homogeneous Ru(bpy)₃Cl₂ catalyst. This high catalytic performance could be attributed to the unique two-dimensional sheet-like structure of Ru(bpy)₃-rGO, which efficiently diminished diffusion resistance of the reactants. Meanwhile, the nonconjugated PhSO₃Na-linkage between Ru(II) complex and the support and the very low electrical conductivity of the catalyst inhibited energy/electron transfer from Ru(II) complex to rGO support, resulting in the decreased support-induced quenching effect. Furthermore, it could be easily recycled at least five times without significant loss of catalytic reactivity.