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Updated: May 12, 2026

Preparation of a Corannulene-functionalized Hexahelicene by Copper(I)-catalyzed Alkyne-azide Cycloaddition of Nonplanar Polyaromatic Units
Published on: September 18, 2016
4-tert-butylcalix[4]arene having nitrile pendant groups as Hg²⁺ selective receptors
Begum Tabakci1, Onder Alici, Ibrahim Karatas
1Selcuk University, Department of Chemistry, 42075 Konya, Turkey. btabakci@selcuk.edu.tr
Abstract:
We synthesized a series of 4-tert-butylcalix[4]arene nitriles (5-7) by the reaction of 4-tert-butylcalix[4]arene (1) with 4'-(6-bromohexyloxy)biphenyl-4-carbonitrile (2), 4'-(10-bromode-cyloxy)biphenyl-4-carbonitrile (3), and 4'-(12-bromododecyloxy)biphenyl-4-carbonitrile (4) and characterized their structures, respectively. The extraction abilities of newly synthesized 5-7 toward some selected heavy metal cations, such as Co(2+), Cu(2+), Ni(2+), Zn(2+), Cd(2+), and Hg(2+), were first evaluated and compared by the solvent extraction method. The extraction results revealed that 5-7 were efficient and selective cation receptors for Hg(2+) over-selected cations. On the other hand, the complexation behavior of Hg(2+) with 5-7 was also investigated by using NMR, UV-vis, and IR spectroscopic methods.
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