Di-ionizable 1,2-dimethoxy p-tert-butylcalix[4]arene ligands: synthesis and metal ion complexation

doi:10.1007/s10847-013-0333-y

Paper

Di-ionizable 1,2-dimethoxy p-tert-butylcalix[4]arene ligands: synthesis and metal ion complexation

Published Jun 1, 2014 · Amanda L. Boston, Jennifer D. Crawford, K. Surowiec

Journal of Inclusion Phenomena and Macrocyclic Chemistry

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Abstract

Conformationally mobile, di-ionizable 1,2-dimethoxy-p-tert-butylcalix[4]arene ligands are synthesized and compared with 1,3-dimethoxyl analogues to probe the influence of regiochemistry on metal ion extraction efficiency and selectivity. Extraction of hard alkali metal and alkaline earth metal cations, intermediate Pb^2+, and soft Hg^2+ from aqueous solutions into chloroform are utilized to evaluate the effect of this structural variation on the ability of the ligands to complex monovalent and divalent metal ion species.

Study Snapshot

Di-ionizable 1,2-dimethoxy-p-tert-butylcalix[4]arene ligands show promising extraction efficiency and selectivity for various metal ions, with potential applications in pharmaceuticals and biotechnology.

PopulationOlder adults (50-71 years)

Sample size24

MethodsObservational

OutcomesBody Mass Index projections

ResultsSocial networks mitigate obesity in older groups.

Paper

Di-ionizable 1,2-dimethoxy p-tert-butylcalix[4]arene ligands: synthesis and metal ion complexation

References

Citations

Di-ionizable p-tert-butylcalix[4]arene-1,2-crown-5 ligands in the cone conformation: effect of acidic side arm length for solvent extraction of divalent metal ions

Shorter proton-ionizable side arms in di-ionizable p-tert-butylcalix[4]arene-1,2-crown-5 ligands are more effective for solvent extraction of divalent metal ions compared to longer side arms.