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Synthesis and characterization of new optically active polymers carrying calix[4]arene and amino acid units in the main chain and their binding properties towards toxic heavy metals
Author(s) -
Hajipour AbdolReza,
Habibi Sakineh,
Ruoho Arnold E
Publication year - 2009
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.2571
Subject(s) - pyromellitic dianhydride , polymer , polymer chemistry , inherent viscosity , condensation polymer , chemistry , metal ions in aqueous solution , alkali metal , monomer , enantiomer , metal , diamine , organic chemistry , polyimide , intrinsic viscosity , layer (electronics)
Abstract BACKGROUND: A series of novel optically active polymers containing upper rim calix[4]arene was prepared from the polycondensation reaction of calix diamine derivative 2 with two optically active diacid chlorides. RESULTS: The optically active compounds were prepared from the reaction of a pyromellitic dianhydride with two chiral amino acids. The optically active polymers were obtained in a yield of 80–86% and had an inherent viscosity of 0.20–0.26 dL g −1 . The polymers were characterized using Fourier transform infrared and 1 H NMR spectroscopy and elemental analysis. Studies of the complexation of the polymers towards some alkali metal and toxic transition metal cations were performed using solid–liquid sorption procedures and comparisons made with the starting monomer. CONCLUSION: It is evident from the complexation studies that the polymers investigated are good polymeric ionophores for alkali metal cations like Na + and K + , for Ag + and for toxic heavy metal cations such as Cu 2+ , Co 2+ , Cd 2+ and Hg 2+ . These polymers are good candidates for use in chiral stationary phases for separation of enantiomers in ionic media, as well for removing metal ions. Copyright © 2009 Society of Chemical Industry