Basu, Arghya published the artcileA C3 -Symmetric Tripodal Urea Receptor for Anions and Ion Pairs: Formation of Dimeric Capsular Assemblies of the Receptor during Anion and Ion Pair Coordination, Safety of Tetraethylammonium hydrogencarbonate, the publication is Journal of Organic Chemistry (2014), 79(6), 2647-2656, database is CAplus and MEDLINE.
A new C3 -sym. urea-based heteroditopic tripodal receptor capable of recognizing both anions and ion pairs was designed, synthesized, and characterized. The protonated receptor forms a sulfate complex which encapsulates a single DMF in the tripodal cavity of the receptor. However, the SO42- anion is located outside the tripodal cavity and is stabilized by N-H¡¤¡¤¡¤O hydrogen bonds from the urea functions of four receptor cations. With TBAHSO4 the receptor forms a contact ion pair complex, where both the TBA+ and SO42- groups are pseudoencapsulated in the tripodal cavity of the protonated receptor. Significantly, the receptor forms a charge-separated polymeric ion pair complex with K+ and HPO42- via formation of a dimeric capsular assembly of the receptor, in which three K+ encapsulated dimeric capsular assemblies interdigitate to form a precise cavity that further encapsulates HPO42-. The receptor also forms an anion complex with CO32- via formation of dimeric capsular self-assembly of the receptor. Solution-state binding studies of the receptor with oxyanions also were carried out by 1H NMR titration experiments, which show the oxyanion binding trend HCO3– > H2PO4– > HSO4–, whereas no binding with NO3– and ClO4– anions is observed
Journal of Organic Chemistry 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, Safety of Tetraethylammonium hydrogencarbonate.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia