1343572-22-4Relevant academic research and scientific papers
Enantioselective molecular recognition of chiral organic ammonium ions and amino acids using cavitand-salen-based receptors
Amato, Maria E.,Ballistreri, Francesco P.,D'Agata, Salvatore,Pappalardo, Andrea,Tomaselli, Gaetano A.,Toscano, Rosa M.,Sfrazzetto, Giuseppe Trusso
, p. 5674 - 5680 (2011)
Two new receptors, a cavitand-salen (2) and a uranyl-cavitand-salen (3), for the selective molecular recognition of chiral ammonium ion pairs, where the amino acid is the countercation or counteranion of the ion pair, were designed and synthesized. UV/Vis
Heteroditopic chiral uranyl-salen receptor for molecular recognition of amino acid ammonium salts
Ballistreri, Francesco P.,Pappalardo, Andrea,Tomaselli, Gaetano A.,Toscano, Rosa M.,Trusso Sfrazzetto, Giuseppe
supporting information; experimental part, p. 3806 - 3810 (2010/09/05)
A new heteroditopic chiral uranyl-salen complex incorporating two pyrenyl groups was designed and synthesized for the recognition of ammonium salts, tetrabutylammonium (TBA) and tetramethylammonium (TMA) amino acids. UV/Vis measurements indicate the formation of 1:1 host-guest complexes with high association constants and an excellent en-antiomeric discrimination between the two enantiomers of phenylalanine-TMA. T-ROESY NMR experiments confirm cation-π and CH-π interactions between the TBA and TMA cations and the two pyrenyl arms, leading to the strong stability of the complexes. This is the first report of a uranyl receptor able to recognize chiral carboxylate guests.
