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Updated: Oct 25, 2026
Synthesis and Characterization of Functionalized Metal-organic Frameworks
Published on: September 5, 2014
Metal-Ion-Mediated Morphology and Pore-Environment Engineering in Isostructural MOFs for Isomer Separation
Mo-Han Gu1, Cheng-Yu Rong1, Ming Xu1
1State Key Laboratory of Microbial Technology, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of Micro-Nano Sensing and Separation Science for Analytical Chemistry, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing210023, China.
Abstract:
Metal-organic frameworks (MOFs) provide an ideal platform for regulating pore environments, yet the role of metal-node substitution in chromatographic separation remains insufficiently understood. Here, a series of isoreticular frl-topology MOFs Al-TBAPy, Sc-TBAPy, and Y-TBAPy (TBAPy = 1,3,6,8-tetrakis(4-carboxyphenyl)pyrene) were constructed to achieve systematically tuned pore structures, crystallization, and morphology. Structural characterization revealed that Al-TBAPy exhibited a slightly larger pore aperture and nanosheet morphology, whereas Sc-TBAPy and Y-TBAPy possessed slightly smaller pores and nanoflower-like structures. Inverse gas chromatography showed that adsorption affinity toward xylene isomers increased from Al-TBAPy to Y-TBAPy, while diffusion coefficients followed the opposite trend. Al-TBAPy achieved the highest separation performance for aromatic isomers among the three materials due to balanced adsorption and mass transfer, whereas Sc-TBAPy and Y-TBAPy exhibited high separation resolutions for alkane isomers owing to enhanced confinement effects. These results demonstrate that rational metal-node substitution can provide a strategy for designing high-performance MOF-based GC stationary phases.
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