Perkins C.G.,Crown Street |
Warren J.E.,Crown Street |
Fateeva A.,Crown Street |
Stylianou K.C.,Crown Street |
And 4 more authors.
Microporous and Mesoporous Materials | Year: 2012
The coordination of benzene-1,3,5-tribenzoate (BTB) and imidazole (Im) with cobalt under basic conditions yields a 2D layered structure, Co 3(BTB) 1.5(Im) 1.35(O) 0.5(OH) 0.5(H 2O) 1.65 guests (1), in which the imidazoles are weakly π-π stacked and hydrogen bonded to the adjacent layers affording a 3D supramolecular network. The structure is based on a hexanuclear Co 6 building unit which comprises four octahedral and two tetrahedral Co(II) centres. The framework is permanently porous to N 2, CO 2 and CH 4, with the strength of interaction at zero coverage being comparable to that at high loading. © 2011 Elsevier Inc. All rights reserved.
PubMed | Crown Street
Type: | Journal: Nature communications | Year: 2011
The main strategy for constructing porous solids from discrete organic molecules is crystal engineering, which involves forming regular crystalline arrays. Here, we present a chemical approach for desymmetrizing organic cages by dynamic covalent scrambling reactions. This leads to molecules with a distribution of shapes which cannot pack effectively and, hence, do not crystallize, creating porosity in the amorphous solid. The porous properties can be fine tuned by varying the ratio of reagents in the scrambling reaction, and this allows the preparation of materials with high gas selectivities. The molecular engineering of porous amorphous solids complements crystal engineering strategies and may have advantages in some applications, for example, in the compatibilization of functionalities that do not readily cocrystallize.