Carbazole-Embedded Cyclodimer adopting Helical Conformation and Metal-ion Sensing

Abstract

An unprecedented formation of carbazole-embedded decaphyrin through acid-catalyzed condensation of appropriate coupling partners is reported. Single crystal X-ray diffraction analysis revealed that the macrocycle adopted a ‘figure-of-eight’ structure, wherein two pyrrole and thiophene rings were inverted. The absorption spectrum of the macrocycle exhibited ill-defined band and shows specific affinity towards soft metal ions such as Ag+ and Hg2+.