Bose, Purnandhu published the artcileCombined Solution-Phase, Solid-Phase and Phase-Interface Anion Binding and Extraction Studies by a Simple Tripodal Thiourea Receptor, Application of Tetrabutylammonium hydrogencarbonate, the publication is European Journal of Inorganic Chemistry (2012), 2012(35), 5791-5801, database is CAplus.
Tris(2-aminoethyl)amine (tren) based 4-cyanophenyl-substituted tripodal L, tris{[(4-cyanophenyl)amino]ethyl}thiourea receptor, was synthesized and explored thoroughly for anion recognition in solution by NMR spectroscopy and isothermal titration calorimetry (ITC) as well as in the solid state by single-crystal X-ray diffraction studies. Anion recognition properties of L were further exploited toward the extraction of sulfate as well as fluoride from aqueous media using a liquid-liquid extraction technique. A solution-state anion binding study using NMR spectroscopy in [D6]DMSO and ITC measurements in dry acetonitrile show a relatively higher association constant of L with halides (F– and Cl–) over oxyanions (H2PO4– and HSO4–). The single-crystal X-ray structural anal. of complex 1 reveals a monotopic encapsulation of fluoride in L through six N-H¡¤¡¤¡¤F– interactions with a distorted trigonal-prismatic geometry, whereas sulfate and carbonate induce dimeric assemblies of L in complexes 2 and 3, resp. In the case of sulfate, a tight dimeric capsular assembly of ca. 9.5 ? is observed through 15 N-H¡¤¡¤¡¤O interactions, whereas carbonate forms a sandwich-like dimeric mol. aggregation through 14 N-H¡¤¡¤¡¤O interactions. In the presence of tetrabutylammonium iodide as the phase transfer agent, L has shown ca. 70 % extraction of fluoride (based on L) and ca. 40 % extraction of sulfate (based on L) from aqueous solutions using an anion-exchange-based liquid-liquid extraction strategy. Extraction of these anions is unambiguously demonstrated by 1H NMR, 19F NMR and FTIR spectroscopy, PXRD and single-crystal X-ray diffraction studies.
European Journal of Inorganic Chemistry published new progress about 17351-62-1. 17351-62-1 belongs to catalysis-chemistry, auxiliary class Salt,Amine, name is Tetrabutylammonium hydrogencarbonate, and the molecular formula is C17H37NO3, Application of Tetrabutylammonium hydrogencarbonate.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia