Synthesis of a crescent aromatic oligothioamide and its high selectivity in recognizing copper(II) ions
摘要:
Functionalization of shape-persistent aromatic oligoamides still represents a difficult task nowadays. A crescent aromatic oligothioamide was synthesized by simple thionation of the corresponding oligoamide with the Lawesson's reagent. The results from UV-vis spectra of the molecule upon metal ion complexation demonstrated its higher selectivity in recognizing Cu2+ ions compared to the oligoamide precursor. The stoichiometry of the complex formed between the thioamide and Cu2+ was found to be 1:1 with a binding constant of (4.3 +/- 0.9) x 10(4) mol/L. (C) 2013 Wen Feng. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.