Extraction of Alkali Metal (Na—Cs) Picrates with Dibenzo-18-crown-6 into Various Organic Solvents. Elucidation of Fundamental Equilibria which Govern the Extraction-Ability and -Selectivity

@article{Yajima2000ExtractionOA,
  title={Extraction of Alkali Metal (Na—Cs) Picrates with Dibenzo-18-crown-6 into Various Organic Solvents. Elucidation of Fundamental Equilibria which Govern the Extraction-Ability and -Selectivity},
  author={Setsuko Yajima and Tsuyoshi Yahata and Yasuyuki Takeda Takeda},
  journal={Journal of inclusion phenomena and macrocyclic chemistry},
  year={2000},
  volume={38},
  pages={305-322}
}
In order to quantitatively investigate effects of the size, the structuralrigidity, and the lipophilicity of dibenzo-18-crown-6 (DB18C6) on itsextraction-ability and -selectivity for alkali metal ions, constants of theoverall extraction (Kex), the distribution for various diluents of lowdielectric constants (KD,MLA), and the aqueous ion-pairformation (KMLA) of DB18C6-alkali metal (Na-—Cs) picrate 1:1:1 complexes were determined at 25°C; the partition constants of DB18C6 itself were also… CONTINUE READING