Topology and porosity control of metal-organic frameworks through linker functionalization
Tetratopic organic linkers have been extensively used in Zr-based metal-organic frameworks (MOFs) where diverse topologies have been observed. Achieving meticulous control over the topologies to tune the pore sizes and shapes of the resulting materials, however, remains a great challenge. Herein, by...
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Veröffentlicht in: | Chemical science (Cambridge) 2019-01, Vol.1 (4), p.1186-1192 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Tetratopic organic linkers have been extensively used in Zr-based metal-organic frameworks (MOFs) where diverse topologies have been observed. Achieving meticulous control over the topologies to tune the pore sizes and shapes of the resulting materials, however, remains a great challenge. Herein, by introducing substituents to the backbone of tetratopic linkers to affect the linker conformation, phase-pure Zr-MOFs with different topologies and porosity were successfully obtained under the same synthetic conditions. The conversion of CO
2
to valuable cyclic carbonates is a promising route for the mitigation of the greenhouse gas. Owing to the presence of substrate accessible Lewis acidic Zr(
iv
) sites in the 8-connected Zr
6
nodes, the Zr-MOFs in this study have been investigated as heterogenous acid catalysts for CO
2
cycloaddition to styrene oxide. The MOFs exhibited drastically different catalytic activities depending on their distinct pore structures. Compared to previously reported MOF materials, a superior catalytic activity was observed with the mesoporous NU-1008, giving an almost 100% conversion under mild conditions.
Topology and porosity control of Zr6-based MOFs was achieved by introducing steric functionalization into the conformations of substituted tetracarboxylate linkers. |
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ISSN: | 2041-6520 2041-6539 |
DOI: | 10.1039/c8sc04220a |