Naslov
Anion-Templated Supramolecular C3-Assembly for Efficient Inclusion of Charge-Dispersed Anions into Hydrogen-Bonded Networks

Autori
Užarević, Krunoslav ; Đilović, Ivica ; Bregović, Nikola ; Tomišić, Vladislav ; Matković-Čalogović, Dubravka ; Cindrić, Marina

Izvornik
Chemistry : a European journal (0947-6539) 17 (2011), 39; 10889-10897

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
anion sensitive podands ; template synthesis ; hydrogen-bonded organic frameworks ; flexible receptors zation ; selective crystallization
(anion sensitive podands ; template synthesis ; hydrogen-bonded organic frameworks ; flexible receptors ; selective crystallization)

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA