Benzimidazolium salts with 1,4-dihydro-naphtho[1,8-ef]-1,4-diazepine: Synthesis, structure and recognition for copper(II) ion

Two benzimidazolium salts with 1,4-dihydro-naphtho[1,8-ef]-1,4-diazepine 1 and 2 have been prepared and characterized. The selective recognition of Cu2+ using 2 as a chemosensor was studied.185