Alkyne-Functionalized Ruthenium Nanoparticles: Ruthenium鈥揤inylidene Bonds at the Metal鈥揕igand Interface

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• 作者：Xiongwu Kang ; Nathaniel B. Zuckerman ; Joseph P. Konopelski ; Shaowei Chen
• 刊名：The Journal of the American Chemical Society
• 出版年：2012
• 出版时间：January 25, 2012
• 年：2012
• 卷：134
• 期：3
• 页码：1412-1415
• 全文大小：253K
• 年卷期：v.134,no.3(January 25, 2012)
• ISSN：1520-5126

文摘

Stable ruthenium nanoparticles were prepared by the self-assembly of 1-dodecyne onto the 鈥渂are鈥?Ru colloid surface. The formation of a Ru鈥搗inylidene (Ru鈺怌鈺怌H鈥揜) interfacial bonding linkage was confirmed by the specific reactivity of the nanoparticles with imine derivatives to form a heterocyclic complex at the metal鈥搇igand interface, as manifested in ¹H and ¹³C NMR, photoluminescence, and electrochemical measurements in which a ferrocenyl imine was used as the labeling probe. Notably, the resulting nanoparticles could also undergo olefin metathesis reactions with vinyl-terminated molecules, as exemplified by the functionalization of the nanoparticles with 1-vinylpyrene. In sharp contrast, no reactvity was observed with 1-dodecynide-stabilized ruthenium nanoparticles with either imine or vinyl derivatives, indicating that these (deprotonated) nanoparticles were stabilized instead by the formation of a Ru鈥揅鈮?d蟺 bond at the metal鈥搇igand interface.