Synthesis of Novel Dibenzo-18-crown-6-ether-Functionalized Benzimidazoles and its Applications in Colorimetric Recognition to Hg2+ and as Antifungal Agents

摘要

New crown ether-functionalized benzimidazoles was designed and synthesized via formylation of dibenzo-18-crown-6 followed by condensation with different o-phenylene diamines. The complexation properties of crown ether-functionalized benzimidazoles with various metals (K+, Ca2+, Ba2+, Co2+, Hg2+) were examined using UV-vis spectroscopy. Hg2+ showed a well-defined peculiar absorption maximum at 366nm exclusively. All these newly synthesized compounds were screened for antifungal activity against Aspergillus niger and Aspergillus oryzae, respectively.