Complexation of di-benzyloxy ether derivatives of calix[4]arene with alkali earth metal cations |
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| Authors: | Farrokh Gharib Saeid Taghvaei Sara Ghazi |
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| Affiliation: | (1) Chemistry Department, Shahid Beheshti University, Tehran, Evin, Iran;(2) Chemistry Department, I. Azad University, North Tehran Branch, Tehran, Iran;(3) Chemistry Department, I. Azad University, Science and Research Campus, Tehran, Hesarak, Iran |
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| Abstract: | The synthesis and complexing abilities of 26,28-bis-benzyloxy-25,27-dihydroxy-5,11,17,23-tetra-tertbutyl-calix[4]arene towards alkali earth metal ions Mg2+, Ca2+, Sr2+, and Ba2+ in a methanol-chloroform mixture have been evaluated at 25°C, using UV-Vis spectrophotometric techniques. The results showed that the ligand is capable to complex all alkali earth cations by 1:1 metal to ligand ratios. The selectivity presented considering the calculated stability constants are in the order Mg2+ > Ca2+ > Sr2+ > Ba2+ towards the ligand. |
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