Zobrazeno 1 - 10
of 31
pro vyhledávání: '"Sadik Elshani"'
Publikováno v:
Journal of Chemical Crystallography. 52:458-468
Autor:
Sadik Elshani, Wladyslaw Walkowiak, Witold A. Charewicz, Malgorzata A. Wegiel, Katarzyna Walus, Richard A. Bartsch
Publikováno v:
Separation Science and Technology. 40:1673-1683
Twelve lipophilic, acyclic polyethers, each with two terminal N‐(X)sulfonyl carboxamate groups, are found to efficiently extract Ra(II) and Ba(II) at radiotracer levels from aqueous solution into chloroform. With the presence of Ba(II) carrier in t
Publikováno v:
Journal of Heterocyclic Chemistry. 42:621-629
New acyclic, macrocyclic and macrobicyclic compounds containing one or two proton-ionizable triazole groups are prepared and characterized. The series includes six podands, a macrocycle with one triazole and one pyridine unit in the ring, a bis-triaz
Autor:
Robert E. Hanes, Sadik Elshani, Dai Qing, Norio Teramae, Richard A. Bartsch, Takashi Hayashita
Publikováno v:
Supramolecular Chemistry. 17:141-146
Below the critical micelle concentration (cmc) of Triton X-100, a PD-18C6/Triton X-100 complex was found to exhibit an amplified fluorescence response for Pb2 + in water. No such signal amplification was noted above the cmc. Dynamic light scattering
Publikováno v:
Journal of Heterocyclic Chemistry. 40:443-450
Synthetic routes to twenty-six new crown ether compounds with pendent amine, amide, O-benzylhydrox-amate, and urethane groups are reported. The new lariat ether compounds are based on sym-dibenzo-16-crown-5, sym-dicyclohexano-16-crown-5, and 14-crown
Publikováno v:
Journal of Heterocyclic Chemistry. 40:451-458
Different types of macrocyclic polyethers with partially fluorinated side arms are prepared. These new macrocyclic ligands are based on sym-dibenzo-16-crown-5 and sym-dicyclohexano-16-crown-5 scaffolds.
Publikováno v:
Separation Science and Technology. 36:1197-1210
The extraction of Cu2+, Pb2+, Cd2+ and Zn2+ utilising supercritical fluid carbon dioxide containing dissolved organophosphorus reagents is shown to be feasible. Using the solubility parameter concept and investigation of a variety of physical paramet
Autor:
Charles L. Cowey, Elzbieta Luboch, Jong Seung Kim, Vincent J. Huber, Byungki Son, Richard A. Bartsch, Joseph A. McDonough, Qiang Zhao, Sheryl N. Ivy, Michael J. Pugia, Mi-Ja Goo, Russell J. Johnson, Sadik Elshani
Publikováno v:
Journal of Heterocyclic Chemistry. 38:311-331
Synthetic routes to forty-seven dibenzo-16-crown-5 compounds with pendant carboxylic acid groups are reported. When taken together with previously described lariat ether carboxylic acids, these new compounds provide several series with systematic str
Autor:
Nicholas R. Natale, Kenneth E. Laintz, Richard A. Bartsch, Sadik Elshani, Hongshan Du, Nazar S. A. Elkarim, Chien M. Wai
Publikováno v:
Tetrahedron. 56:4651-4657
A series of lariat ether carboxylic acids, O-benzylhydroxamates, and hydroxamic acids with fluorine-containing substituents is prepared. In general, the presence of fluorine-containing substituents is found to increase the solubility of the lariat et
Publikováno v:
Tetrahedron. 56:3291-3301
Derivatives of aza-12-crown-4, aza-15-crown-5, aza-18-crown-6, 1,10-diaza-18-crown-6 and 1,4,8,12-tetraazacyclopentadecane with partially fluorinated substituents attached to nitrogen are prepared. Their efficiencies and selectivities in alkali metal