四硫富瓦烯衍生物修饰的银溶胶

Silver Nanoparticles Modified with Tetrathiafulvalene

合成了一种新的四硫富瓦烯衍生物修饰的银溶胶,并通过透射电子显微镜、红外、紫外、拉曼光谱和循环伏安法测试技术对其进行了表征。透射电子显微镜照片显示,纳米银颗粒为球形,其直径约为70 nm,用四硫富瓦烯衍生物修饰的银纳米粒子有较好的单分散性。将修饰后的银溶胶固着在Pt片电极上进行了电化学测定。结果显示,修饰后的纳米银颗粒具有较好的氧化还原活性。2组氧化-还原峰(E1/2)为0.67和0.86 V,分别对应于TTF/TTF.+和TTF.+/TTF2+2个单电子氧化过程。

A new tetrathiafulvalene（TYF） modified silver colloid was prepared and characterized by means of TEM, IR, UV-Vis, Raman, and cyclic vohammogram. The surface of the silver nanoparticles was coordinated with 3,4-ethylenedisulfanyl-TYF thiolate. The TIT-modified Ag nanoparticles（ about 70 nm） were monodispersed. Cyclic voltammogram of the TTF-Ag nanoparticles on a Pt electrode showed that it was a redox active nano-system. Two pairs of quasi-reversible redox waves appeared at E1/2 = ＋ 0. 67 V and E1/2 = ＋ 0. 86 V, corresponding to TTF/TTF^-＋ and TTF^-＋/TTF^2＋ , respectively.