Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States.
Nano Lett. 2012 Jun 13;12(6):3080-5. doi: 10.1021/nl300971t. Epub 2012 May 8.
The diffusion of individual Nile red molecules in three different crystalline microporous coordination polymers (MCPs) is visualized with single-molecule fluorescence microscopy. By localizing molecules with high spatial resolution, the trajectories of the diffusing dyes are reconstructed with nanometer-scale precision. A detailed analysis of these tracks reveals different dynamics and guest-host interactions in each crystal as well as distinct motion types within the same system, suggesting the presence of structural heterogeneities in local environments.
利用单分子荧光显微镜可视化了单个尼罗红分子在三种不同结晶微孔配位聚合物（MCP）中的扩散。通过对分子进行高空间分辨率定位，以纳米级精度重建了扩散染料的轨迹。对这些轨迹的详细分析揭示了每个晶体中不同的动力学和客体-主体相互作用，以及同一系统内不同的运动类型，表明局部环境中存在结构异质性。
