Isoreticular Crystallization of Highly Porous Cubic Covalent Organic Cage Compounds**

Ivanova, Svetlana; Köster, Eva; Holstein, Julian J.; Keller, Niklas; Clever, Guido H.; Bein, Thomas und Beuerle, Florian (2021): Isoreticular Crystallization of Highly Porous Cubic Covalent Organic Cage Compounds**. In: Angewandte Chemie-International Edition, Bd. 60, Nr. 32: S. 17455-17463

Abstract

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. n-Butyl 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 m(2) g(-1) and 1.84 cm(3) 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.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Chemie und Pharmazie > Department Chemie
• Themengebiete: 500 Naturwissenschaften und Mathematik > 540 Chemie
• ISSN: 1433-7851
• Sprache: Englisch