Premium
Synthesis and Complexation Studies of Calix[4]crown Telomers Intermolecularly Bridged with Calixarene Segments
Author(s) -
LI Haibing,
TIAN Demei,
CHEN Yuanyin,
GAO Zhig
Publication year - 2009
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.200990004
Subject(s) - calixarene , chemistry , metal ions in aqueous solution , histidine , tryptophan , polymer chemistry , monomer , amino acid , metal , liquid–liquid extraction , stereochemistry , extraction (chemistry) , organic chemistry , molecule , polymer , biochemistry
Three derivatived calix[4]crowns were condensed with calixarene segments: 2,6‐bis(bromomethyl)‐4‐methyl‐anisole (BBA) to afford their telomers TCA[4] in rational yields. The binding sites may complex metal ions or amino acids selectively. The telomers shows different metal ions selectivity in comparison with their monomers, which suggests that calixarene segment bridges play an important role in ion‐binding. The liquid‐liquid extraction experiment showed that telomer TCA[4]‐III was excellent receptor for zwitterionic α‐amino acids and soft cations Ag + and Pb 2+ . The extraction percentage of tryptophan and histidine was as high as 87.9% and 91.5%, respectively.