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https://hdl.handle.net/11499/6151
Title: | Removal of heavy metal ions from aqueous solution by azocalix[4]arene |
Authors: | Karakus, Ozlem Ozen Elçin, Serkan Yılmaz, M Deligoz, Hasalettin |
Keywords: | Azocalixarene Batch sorption Calix[4]arene Heavy metals Oligomer Polyamide |
Abstract: | This study presents the preparation, characterization, and sorption properties of new chromogenic azocalix[4]arene based oligomers (1a, 2a and 3a) towards some selected heavy metal (Ag+, Hg+, Hg2+, Co2+, Ni2+, Cu2+, Cd2+ and Cr3+) cations. These compounds have been synthesized via polycondensation reactions involving 25,27-diethylacetoxy-26,28-dihydroxy-5,17-bis(4-nitrophenylazo)calix[4]arene (1), 25,27-diethyl acetoxy-26,28-dihydroxy-5,17-bis(4-ethylphenylazo)calix[4]arene (2), or 25,27-diethyl acetoxy-26,28-dihydroxy-5,17-bis(4-bromophenylazo)calix[4]arene (3) with 1,4-bisamino methyl benzene. Two-phase sorption properties of azocalixarene oligomers (1a, 2a and 3a) towards the selected metal cations are reported. The binding properties of these oligomers towards the selected metal cations were observed to be higher than those of monomeric analogs. It is suggested that this increased binding ability arises from highly rigid azo (–N=N–) group moiety at the upper rim of calix[4]arene in the oligomeric skeleton. © 2011 Taylor & Francis Group, LLC. |
URI: | https://hdl.handle.net/11499/6151 https://doi.org/10.5004/dwt.2011.2112 |
ISSN: | 1944-3994 |
Appears in Collections: | Fen-Edebiyat Fakültesi Koleksiyonu Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection |
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