Scholarlink

<p>We have examined the translational diffusion of the polar chromophore Rhodamine B (RB) in the room temperature ionic liquid 1-butyl-3-methylimidazolum bis(trifluoromethylsulfonyl)imide (BMIM TFSI) using fluorescence recovery after photobleaching (FRAP) as a function of the length scale of chromophore diffusional motion. Our data show that the diffusion constants recovered from the measurements appear to depend on the size of the photobleached region, consistent with anomalous super-diffusion in a regime suggestive of quasi-ballistic motion. The functional form of the diffusion constant spot-size dependence can be accounted for in the context of partitioning of a relatively small fraction of the diffusing chromophores into low viscosity domains at any given time, which relies on local compositional heterogeneity in the ionic liquid.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

The length-scale dependence of diffusion in a room temperature ionic liquid: insight into the effect of spatial heterogeneity

  • 期刊论文

  • 发表日期：

    2025年3月7日

查看全文
  • Emily D. Simonis,
  • G. J. Blanchard

摘要

We have examined the translational diffusion of the polar chromophore Rhodamine B (RB) in the room temperature ionic liquid 1-butyl-3-methylimidazolum bis(trifluoromethylsulfonyl)imide (BMIM TFSI) using fluorescence recovery after photobleaching (FRAP) as a function of the length scale of chromophore diffusional motion. Our data show that the diffusion constants recovered from the measurements appear to depend on the size of the photobleached region, consistent with anomalous super-diffusion in a regime suggestive of quasi-ballistic motion. The functional form of the diffusion constant spot-size dependence can be accounted for in the context of partitioning of a relatively small fraction of the diffusing chromophores into low viscosity domains at any given time, which relies on local compositional heterogeneity in the ionic liquid.