Preparation and characterization of gold nanoparticles with a ruthenium-terpyridyl complex, and electropolymerization of their pyrrole-modified metal nanocomposites
作者:Masayuki Ito、Takashi Tsukatani、Hisashi Fujihara
DOI:10.1039/b412406e
日期:——
The reduction of tetrachloroaurate with sodium borohydride in the presence of 2,2′:6′,2″-terpyridyloctanethiol gave terpyridine-functionalized gold nanoparticles (Tpy–Au, core size 2.0 nm). Metal complexation of Tpy–Au with ruthenium-terpyridyl trichloride, Ru(tpy)Cl3, led to new gold nanoparticles bearing the ruthenium-terpyridine complex (Ru–Tpy–Au, core size 5.5 nm) which showed a characteristic MLCT (metal-to-ligand charge transfer) band in the visible region at 483 nm due to the terpyridine-ruthenium complex and a plasmon resonance at ∼510 nm in the UV-vis spectrum. The redox behavior of Ru–Tpy–Au was studied by cyclic voltammetry. Surface modification of metal electrodes was performed by the electropolymerization of pyrrole-functionalized Ru–Tpy–Au nanoparticles (Pyr–Ru–Tpy–Au) which were obtained from the ligand-exchange reaction of Ru–Tpy–Au with ω-(N-pyrrolyl)decanethiol.
在 2,2′:6′,2″-三吡啶辛硫醇存在下,用硼氢化钠还原四氯金酸酯,得到了三吡啶功能化金纳米粒子(Tpy-Au,核心尺寸 2.0 nm)。Tpy-Au 与三氯化钌-三吡啶(Ru(typy)Cl3)发生金属络合,产生了带有钌-三吡啶络合物的新金纳米粒子(Ru-Tpy-Au,核心尺寸为 5.在紫外可见光谱中,Ru-Tpy-Au 在 ∼ 510 nm 处显示出等离子共振。循环伏安法研究了 Ru-Tpy-Au 的氧化还原行为。Ru-Tpy-Au 与 ω-(N-吡咯基)癸硫醇的配体交换反应得到的吡咯官能化 Ru-Tpy-Au 纳米粒子(Pyr-Ru-Tpy-Au)通过电聚合作用对金属电极进行了表面修饰。