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Wei, Yanhu

Publications and source records attributed to Wei, Yanhu.

11 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2012

Transport into Metal-Organic Frameworks from Solution Is Not Purely Diffusive

A combination of confocal microscopy (see picture) and reaction-diffusion modeling provided a powerful toolkit with which solution transport into metal–organic framework crystals was studied. Commonly used pure diffusion models are insufficient to describe this process and, instead, it is necessary to account for the interactions of the guest molecules and the MOF scaffold.

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CH↗
DOE OSTI2010

Imprinting Chemical and Responsive Micropatterns into Metal-Organic Frameworks

Wet stamping allows metal–organic framework (MOF) crystals to be imprinted with micropatterns of various organic chemicals. Printing the MOFs with photochromic molecules and pH indicators generates stimuli-responsive micropatterns which change their appearance upon contact with specific chemicals (see picture), thus reporting the environmental “status” of the crystal.

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CH↗
DOE OSTI2010

Chromatography in a Single Metal-Organic Framework (MOF) Crystal

Millimeter-sized single MOF-5 crystals are used as “chromatographic columns” to effectively separate mixtures of organic dyes. Remarkably, owing to the nanoscopic pore dimensions and the molecular-level interactions between the migrating molecules and the MOF scaffold, the separations occur over a distance of only a few hundred micrometers which is unambiguously confirmed by fluorescence confocal microscopy.

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CH↗