KCl对含有纳米银的[Ru(bpy)_3]^(2+)荧光性能影响  

Effects of KCl on Fluorescence of [Ru(bpy)_3]^(2+) Solution Containing Silver Nanoparticles

作　　者：王悦辉[1] 周济[1] 石士考[1] 

机构地区：[1]清华大学新型陶瓷与精细工艺国家重点实验室,北京100084

出　　处：《光谱学与光谱分析》2007年第7期1377-1380,共4页Spectroscopy and Spectral Analysis

基　　金：国家'863'计划(2003AA32G030);国家'973'计划(2002CB61306;2001CB6104);国家杰出青年基金项目(50425204);国家自然科学基金项目(50272032)资助

摘　　要：通过吸收光谱、荧光光谱等手段研究了KCl对含有纳米银的金属钌联吡啶配合物([Ru(bpy)3]2+)的荧光性能的影响。结果表明,KCl与纳米银粒子间存在较强的相互作用,这种强的相互作用破坏了[Ru(bpy)3]2+与纳米银粒子间的链状网络结构,形成大颗粒和团聚体。同时,在吸收光谱的长波段处观察到明显的新的吸收带,随着KCl量的增加,新吸收带峰值逐渐红移并展宽。随着KCl量的增加,[Ru(bpy)3]2+荧光强度先猝灭而后逐渐增强,直至达到一个定值。文章从分子间的相互作用、能量传递等方面探讨了KCl对含有纳米银的[Ru(bpy)3]2+荧光性能影响机理。In the present paper, the authors studied the effects of KCI on the fluorescence of [Ru（bpy）3]^2＋ solution containing silver nanoparticles by UV-Vis absorption spectra and fluorescence spectra. The results indicated that the stronger action between KC1 and silver nanoparticles led to the vanishing of chain-like net structure formed between [Ru（bpy）3]^2＋ and silver nanoparticles and the formation of large particles and aggregates in the solution. Meanwhile, a new band at longer wavelength region appeared and the peak at long wavelength was red-shifted and broadened with the increase of KCl. With the increase in KCl content, the fluorescence decreases first and then increases till a constant value. The authors discussed the mechanism of the effects KC1 on the fluorescence of [Ru（bpy）3]^2＋ solution containing silver nanoparticles in terms of interaction and energy transfer.

关 键 词：KCL 纳米银 [Ru(bpy)3]^2+ 荧光增强 荧光猝灭 

分 类 号：O657.3[理学—分析化学]