Synthesis and characterization of a paramagnetic receptor based on cyclobis(paraquat-p-phenylene) tetracation
Synthesis of a new class of π-electron-deficient tetracationic cyclophane ring, cyclobis(paraquat-p-phenylene), carrying one or two paramagnetic side-arms based on 2,2,6,6-tetramethylpiperidine-N-oxyl (TEMPO) moiety has been achieved in five steps startin