April 2, 2010Journal of the American Chemical Society615 citations
Non-, Micro-, and Mesoporous Metal−Organic Framework Isomers: Reversible Transformation, Fluorescence Sensing, and Large Molecule Separation
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Puntos clave
- Synthesize distinct structural isomers of metal-organic frameworks with tunable pore dimensions and explore their reversible phase transitions and functional applications.
- Synthesized nonporous, microporous, and mesoporous MOF isomers by adjusting solvent volumes, reaction temperatures, and reaction times.
- Triggered reversible structural transformations between the microporous and mesoporous phases through thermal and solvent perturbations.
- Tested the desolvated microporous MOF as a luminescent small-molecule sensor and applied the mesoporous MOF as an HPLC stationary phase for dye separation.
- Achieved controlled synthesis of three distinct MOF isomers spanning nonporous to mesoporous pore regimes.
- Demonstrated fully reversible phase switching between microporous and mesoporous isomeric frameworks via solvent and temperature controls.
- Established effective small-molecule luminescence probing with the microporous isomer and successful size-exclusion separation of large dye molecules using the mesoporous isomer.
Resumen
For the first time, three novel metal-organic framework (MOF) isomers with hierarchical channel sizes of nonpore or micropore or mesopore were successfully prepared by simply controlling the amounts of solvent or/and reaction temperatures/time. Strikingly, we have demonstrated the reversible transformation between the microporous and mesoporous MOFs triggered by solvent or/and temperature perturbation. The desolvated microporous MOF has been evaluated to be a promising luminescent probe for detecting small molecules, and the mesoporous MOF could be the stationary phase in high-performance liquid chromatography (HPLC) for size-exclusion separation of large dye molecules.