English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Metal ion extractability in liquid-liquid extraction using spirobenzopyrans possessing a crown ether moiety was evaluated by molecular dynamics. It was found that a longer alkyl group attached to the spirobenzopyran ring results in greater stability in the organic phase. The same trend was observed for the model metal complex. When the crowned spirobenzopyran was complexed with an alkali metal ion, the steric energy in the aqueous phase was decreased. However, the energy was higher than that of the complex in the organic phase; as a result, the complex was more stable in the organic phase. In addition, the metal ion which forms the most stable complex depends on the ring size of the crown ether. The tendency was confirmed by the liquid-liquid extraction of alkali metal ion with the crowned spirobenzopyran. This indicates that it is possible to predict the properties of extraction reagents from their steric energy values calculated using molecular dynamics.

Evaluation of Metal Ion Extractability of Crowned Spirobenzopyrans by Molecular Dynamics Calculation