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

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.