期刊
ACS CENTRAL SCIENCE
卷 8, 期 2, 页码 184-191出版社
AMER CHEMICAL SOC
DOI: 10.1021/acscentsci.1c01344
关键词
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资金
- National Natural Science Foundation of China [21922407, 22174067]
- Natural Science Foundation of Jiangsu Province of China [BK20190086]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Robert A. Welch Foundation
- Welch Endowed Chair [A-0030]
This study demonstrates a metal-organic framework (MOF) solid solution (MOSS) strategy to homogeneously mix NU-1000 and NU-901 structures inside single MOF nanocrystals. The MOSS nanocrystals show high separation abilities and unique elution sequence due to the well-tuned pore ratio.
Pore engineering plays a significant role in the applications of porous materials, especially in the area of separation and catalysis. Here, we demonstrated a metal-organic framework (MOF) solid solution (MOSS) strategy to homogeneously and controllably mix NU-1000 and NU-901 structures inside single MOF nanocrystals. The key for the homogeneous mixing and forming of MOSS was the bidentate modulator, which was designed to have a slightly longer distance between two carboxylate groups than the original tetratopic ligand. All of the MOSS nanocrystals showed a uniform pore size distribution with a well-tuned ratio of mesopores to micropores. Because of the appropriate pore ratio, MOSS nanocrystals can balance the thermodynamic interactions and kinetic diffusion of the substrates, thus showing exceedingly higher separation abilities and a unique elution sequence. Our work proposes a rational strategy to design mixed-porous MOFs with controlled pore ratios and provides a new direction to design homogeneously mixed MOFs with a high separation ability and unique separation selectivity.
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