Anion-Templated Supramolecular C3-Assembly for Efficient Inclusion of Charge-Dispersed Anions into Hydrogen-Bonded Networks (CROSBI ID 174500)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Užarević, Krunoslav ; Đilović, Ivica ; Bregović, Nikola ; Tomišić, Vladislav ; Matković-Čalogović, Dubravka ; Cindrić, Marina
engleski
Anion-Templated Supramolecular C3-Assembly for Efficient Inclusion of Charge-Dispersed Anions into Hydrogen-Bonded Networks
This work considers binding properties and conformational adaptability of a known nitrate/sulfate receptor N, N’-3-azapentane-1, 5-bis[3-(1-aminoethylidene)-6-methyl-3H-pyran-2, 4-dione] (L) toward various charge-dispersed monoanions (HSO3–, ClO4–, IO4–, PF6– and SbF6–). These anions template folding of three HL+ species through a self-assembly processes into a new hollow supramolecular trication. During the self-assembly, all strong hydrogen bond donors of the podand become coordinatively saturated by interactions with the oxo-functionalities from other HL+ molecules. In that way, only the weak hydrogen bond donating groups in the exterior part of the receptor are accessible for anion binding. The investigated anions are accommodated in the hydrophobic pockets of the isomorphous hydrogen-bonded frameworks which serve as a base for selective crystallization from the highly competitive anion/solvent systems. This behavior is discussed in terms of size and geometry of the anions as well as the receptor’s coordination capabilities to provide the most favorable surrounding for guest inclusion both in solution and in the solid state.
anion sensitive podands ; template synthesis ; hydrogen-bonded organic frameworks ; flexible receptors ; selective crystallization
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Podaci o izdanju
17 (39)
2011.
10889-10897
objavljeno
0947-6539
1521-3765
10.1002/chem.201101127