Sterically congested, geminal aryl-substituted, proton-ionizable sym-dibenzo-16-crown-5 lariat ethers: synthesis and alkali metal cation extraction
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چکیده
منابع مشابه
Ionic recognition by proton-ionizable lariat ethers and their polymers
To probe the influence of structural variation within dibenzo-16crown-5-oxyacetic acids upon the selectivity of alkali metal cation separations by solvent extraction and liquid membrane transport processes, studies have now been conducted in homogeneous solution by NMR spectroscopy and titration calorimetry and in the solid state. Condensation polymerization of such proton-ionizable lariat ethe...
متن کاملAlkali-Metal and Alkaline-Earth Cation and Proton Selectivities of Dibenzo- 14-crown-4 and Its Derivatives in Polymeric Membranes
(6 ) Swyt, C. R. Fiori, C. E. Microbeam Analysis-1986; San Francisco Press: San Francisco, CA, 1986; p 482. (7) Myklebust, R. L.; Marinenko, R. B.; Newbury, D. E.; Bright. D. S. Microbsem Analysis1985; Sen Francisco Press: San Francisco, CA, 1985; p 101. (6 ) Mayr, M.; Angeili, J. X-Ray Spectrom. 1985, 14, 89. (9) Ono, Y.; Nbken, C. H.; Tagata, S.; Seo, Y. Microbeam Anawsis1985; San Francisco P...
متن کاملDansyl - Substituted Aza Crown Ethers: Complexation with Alkali, Alkaline Earth Metal Ions and Ammonium.
The present study investigates the binding properties of four dansyl substituted aza-crown ethers with alkali, alkaline earth metal ions and ammonium. The influence of the solvent polarity and protonation on the photophysical properties of the compounds was studied by UV/Vis and fluorescence methods. The host species caused only slight changes on the absorption spectra of the ligands. The fluor...
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This study represents the synthesis of dibenzo and dibenzodiaza crown ether precursors with various functional groups in good yield by employing four different methods using polar protic and aprotic solvents with high boiling points. Also the complexation abilities of all synthesized ligands with Cu , Zn , and Ag were studied by conductometry; thus the conductometric behavior of Cu(NO3)2, ZnCI2...
متن کاملEffect of structural variation within lipophilic N-(X)sulfonyl carbamoyl lariat ethers on the selectivity and efficiency of competitive alkali metal cation extraction into chloroform.
Sixteen lipophilic N-(X)sulfonyl carbamoyl lariat ethers with polyether ring sizes of 12-crown-4, 14-crown-4, 15-crown-5, and 18-crown-6 are utilized for competitive alkali metal cation extractions from aqueous solutions into chloroform. Variation of the electron-withdrawing properties of X in the series of methyl, phenyl, 4-nitrophenyl, and trifluoromethyl allows the influence of the acidity o...
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ژورنال
عنوان ژورنال: Arkivoc
سال: 2010
ISSN: 1551-7012
DOI: 10.3998/ark.5550190.0011.708