Detail of "2472-88-0"

Reference

A New Chiral Probe for Sulfate Anion: UV, CD, Fluorescence, and NMR Spectral Studies of 1:1 and 2:1 Complex Formation and Structure of Chiral Guanidinium-p-Dimethylaminobenzoate Conjugate with Sulfate Anion

A New Chiral Probe for Sulfate Anion: UV, CD, Fluorescence, and NMR Spectral Studies of 1:1 and 2:1 Complex Formation and Structure of Chiral Guanidinium-p-Dimethylaminobenzoate Conjugate with Sulfate Anion. Kobiro, Kazuya; Inoue, Yoshihisa (Department of Environmental Systems Engineering, Kochi University of Technology, Kochi 782-8502, Japan). Journal of the American Chemical Society, 125(2), 421-427 (English) 2003 American Chemical Society. CODEN: JACSAT.Chemical with cas number 2472-88-0 also plays role. ISSN: 0002-7863. DOCUMENT TYPE: Journal CA Section: 79 (Inorganic Analytical Chemistry) Section cross-reference(s): 68 A new chiral chromophoric host 1, possessing a 4-(N,N-dimethylamino)benzoate (DMAB) group tethered to a chiral bicyclic guanidinium subunit, was synthesized and applied to the probe for sulfate anion. Host 1 showed typical successive 1:1 and 2:1 host:guest complexation behavior toward the divalent sulfate anion, as revealed by UV-visible, CD, fluorescence, and 1H NMR spectroscopic studies. The DMAB chromophore is a sensitive CD spectral probe for assessing not only the complexation behavior but also complex stoichiometry and structure. The stepwise 1:1 and 2:1 complexation consts. (K1 and K2) were detd. as 1.53 ′ 106 and 4.84 ′ 104 M-1, resp., by NMR titrn. in CD3CN. The CD exciton chirality method allowed one to det. the chiral sense (spatial arrangement) of the two DMAB moieties in the 2:1 complex as neg. (counterclockwise). The dual fluorescence behavior of DMAB was employed for elucidating the role of the countercation upon complexation of host 1 with sulfates possessing lipophilic countercation(s) such as tetrabutylammonium. .