title: Heterogeneous single-molecule diffusion in one-, two-, and three-dimensional microporous coordination polymers: directional, trapped, and immobile guests.
abstract: 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.
authors.affiliation: Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States.
authors.forename: Yi
authors.initials: Y
authors.lastname: Liao
authors.forename: Seong K
authors.initials: SK
authors.lastname: Yang
authors.forename: Kyoungmoo
authors.initials: K
authors.lastname: Koh
authors.forename: Adam J
authors.initials: AJ
authors.lastname: Matzger
authors.forename: Julie S
authors.initials: JS
authors.lastname: Biteen
mesh_terms: D000327:Adsorption; D004058:Diffusion; D008422:Materials Testing; D008856:Microscopy, Fluorescence / Q000379:methods*; D010078:Oxazines / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D016062:Porosity
chemical_list: D010078:Oxazines; D011108:Polymers; C044808:nile red