Heo, Nam Jung published the artcileCapture and displacement-based release of the bicarbonate anion by calix[4]pyrroles with small rigid straps, SDS of cas: 17351-61-0, the publication is Chemical Science (2020), 11(31), 8288-8294, database is CAplus and MEDLINE.
Two-phenoxy walled calix[4]pyrroles 1 and 2 strapped with small rigid linkers containing pyridine and benzene, resp., have been synthesized. 1H NMR spectroscopic analyses carried out in CDCl3 revealed that both of receptors 1 and 2 recognize only F– and HCO3– among various test anions with high preference for HCO3– (as the tetraethylammonium, TEA+ salt) relative to F– (as the TBA+ salt). The bound HCO3– anion was completely released out of the receptors upon the addition of F– (as the tetrabutylammonium, TBA+ salt) as a result of significantly enhanced affinities and selectivities of the receptors for F– once converted to the TEAHCO3 complexes. Consequently, relatively stable TEAF complexes of receptors 1 and 2 were formed via anion metathesis occurring within the receptor cavities. By contrast, the direct addition of TEAF to receptors 1 and 2 produces different complexation products initially, although eventually the same TEAF complexes are produced as via sequential TEAHCO3 and TBAF addition These findings are rationalized in terms of the formation of different ion pair complexes involving interactions both inside and outside of the core receptor framework.
Chemical Science published new progress about 17351-61-0. 17351-61-0 belongs to catalysis-chemistry, auxiliary class Phase Transfer Catalyst, name is Tetraethylammonium hydrogencarbonate, and the molecular formula is C9H21NO3, SDS of cas: 17351-61-0.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia