Cesium complex of an unsymmetrical calix[4]crown-dibenzocrown-6

Jong Seung Kim, Won Ku Lee, Soo Heon Lee, Jin Gyu Kim, Il Hwan Suh, Jong Yeol Kim, Jong Wan Kim

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

An unsymmetrical calix[4]-bis-crown ether having both conventional crown-6 and dibenzocrown-6 rings in a fixed 1,3-alternate conformation was synthesized with good yield by the reaction of a monocyclic calix[4]crown-6 with dibenzodimesylate in the presence of cesium carbonate. The cesium ion selectivity among alkali metal ions increased compared to symmetrical calix[4]-bis-crown-6. The solid state structure of the ligand-cesium complex illustrates a 1:2 complex ratio. On the contrary, in solution, e.g., extraction equilibrium and 1 H NMR experiment gave a 1:1 complex ratio. From the result of the chemical shift change upon metal ion complex, the cesium ion seems to prefer the dibenzocrown loop to the conventional crown-6 ring.

Original languageEnglish
Pages (from-to)183-187
Number of pages5
JournalJournal of Inclusion Phenomena
Volume40
Issue number3
DOIs
Publication statusPublished - 2001 Jul 1
Externally publishedYes

Fingerprint

cesium ions
Cesium
cesium
Crowns
metal ions
Ions
Metal ions
rings
alkali metals
Alkali Metals
Crown Ethers
chemical equilibrium
ethers
carbonates
selectivity
Chemical shift
ions
solid state
nuclear magnetic resonance
ligands

Keywords

  • Calix[4]-bis-crown
  • Calixarene
  • Complexation
  • Crown ether
  • Crystal structure

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics

Cite this

Kim, J. S., Lee, W. K., Lee, S. H., Kim, J. G., Suh, I. H., Kim, J. Y., & Kim, J. W. (2001). Cesium complex of an unsymmetrical calix[4]crown-dibenzocrown-6. Journal of Inclusion Phenomena, 40(3), 183-187. https://doi.org/10.1023/A:1011821612309

Cesium complex of an unsymmetrical calix[4]crown-dibenzocrown-6. / Kim, Jong Seung; Lee, Won Ku; Lee, Soo Heon; Kim, Jin Gyu; Suh, Il Hwan; Kim, Jong Yeol; Kim, Jong Wan.

In: Journal of Inclusion Phenomena, Vol. 40, No. 3, 01.07.2001, p. 183-187.

Research output: Contribution to journalArticle

Kim, JS, Lee, WK, Lee, SH, Kim, JG, Suh, IH, Kim, JY & Kim, JW 2001, 'Cesium complex of an unsymmetrical calix[4]crown-dibenzocrown-6', Journal of Inclusion Phenomena, vol. 40, no. 3, pp. 183-187. https://doi.org/10.1023/A:1011821612309
Kim, Jong Seung ; Lee, Won Ku ; Lee, Soo Heon ; Kim, Jin Gyu ; Suh, Il Hwan ; Kim, Jong Yeol ; Kim, Jong Wan. / Cesium complex of an unsymmetrical calix[4]crown-dibenzocrown-6. In: Journal of Inclusion Phenomena. 2001 ; Vol. 40, No. 3. pp. 183-187.
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