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Selective CO 2 Adsorption in a Supramolecular Organic Framework
Author(s) -
Patil Rahul S.,
Banerjee Debasis,
Zhang Chen,
Thallapally Praveen K.,
Atwood Jerry L.
Publication year - 2016
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201600658
Subject(s) - van der waals force , supramolecular chemistry , intermolecular force , adsorption , molecule , solvent , hydrogen bond , crystal engineering , context (archaeology) , materials science , nanotechnology , chemical engineering , chemistry , organic chemistry , paleontology , engineering , biology
Considering the rapidly rising CO 2 level, there is a constant need for versatile materials which can selectively adsorb CO 2 at low cost. The quest for efficient sorptive materials is still on since the practical applications of conventional porous materials possess certain limitations. In that context, we designed, synthesized, and characterized two novel supramolecular organic frameworks based on C ‐pentylpyrogallol[4]arene (PgC 5 ) with spacer molecules, such as 4,4′‐bipyridine (bpy). Highly optimized and symmetric intermolecular hydrogen‐bonding interactions between the main building blocks and comparatively weak van der Waals interactions between solvent molecules and PgC 5 leads to the formation of robust extended frameworks, which withstand solvent evacuation from the crystal lattice. The evacuated framework shows excellent affinity for carbon dioxide over nitrogen and adsorbs ca. 3 wt % of CO 2 at ambient temperature and pressure.