Isoreticular Crystallization of Highly Porous Cubic Covalent Organic Cage Compounds
Modular frameworks featuring well-defined pore structures in microscale domains establish tailor-made porous materials. For open molecular solids however, maintaining long-range order after desolvation is inherently challenging, since packing is usually governed by only a few supramolecular interactions. Here we report on two series of nanocubes obtained by co-condensation of two different hexahydroxy tribenzotriquinacenes (TBTQs) and benzene-1,4-diboronic acids (BDBAs) with varying linear alkyl chains in 2,5-position. nButyl groups at the apical position of the TBTQ vertices yielded soluble model compounds, which were analyzed by mass spectrometry and NMR spectroscopy. In contrast, methyl-substituted cages spontaneously crystallized as isostructural and highly porous solids with BET surface areas and pore volumes of up to 3426 m2 g−1 and 1.82 cm3 g−1. Single crystal X-ray diffraction and sorption measurements revealed an intricate cubic arrangement of alternating micro- and mesopores in the range of 0.97–2.2 nm that are fine-tuned by the alkyl substituents at the BDBA linker..
Medienart: |
Preprint |
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Erscheinungsjahr: |
2021 |
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Erschienen: |
2021 |
Enthalten in: |
chemRxiv.org - (2021) vom: 18. Nov. Zur Gesamtaufnahme - year:2021 |
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Sprache: |
Englisch |
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Beteiligte Personen: |
Ivanova, Svetlana [VerfasserIn] |
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Links: |
Volltext [kostenfrei] |
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Themen: |
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doi: |
10.26434/chemrxiv.14132108 |
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funding: |
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PPN (Katalog-ID): |
XCH020069820 |
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520 | |a Modular frameworks featuring well-defined pore structures in microscale domains establish tailor-made porous materials. For open molecular solids however, maintaining long-range order after desolvation is inherently challenging, since packing is usually governed by only a few supramolecular interactions. Here we report on two series of nanocubes obtained by co-condensation of two different hexahydroxy tribenzotriquinacenes (TBTQs) and benzene-1,4-diboronic acids (BDBAs) with varying linear alkyl chains in 2,5-position. nButyl groups at the apical position of the TBTQ vertices yielded soluble model compounds, which were analyzed by mass spectrometry and NMR spectroscopy. In contrast, methyl-substituted cages spontaneously crystallized as isostructural and highly porous solids with BET surface areas and pore volumes of up to 3426 m2 g−1 and 1.82 cm3 g−1. Single crystal X-ray diffraction and sorption measurements revealed an intricate cubic arrangement of alternating micro- and mesopores in the range of 0.97–2.2 nm that are fine-tuned by the alkyl substituents at the BDBA linker. | ||
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700 | 1 | |a Holstein, Julian J. |e verfasserin |4 aut | |
700 | 1 | |a Keller, Niklas |e verfasserin |4 aut | |
700 | 1 | |a Clever, Guido H. |e verfasserin |4 aut | |
700 | 1 | |a Bein, Thomas |e verfasserin |4 aut | |
700 | 1 | |a Beuerle, Florian |e verfasserin |4 aut | |
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