We studied self-organization of azahelicenes ((+)-(P)-2-aza[6]helicene) on Ag(1,1,1) surfaces. Combined scanning tunneling microscopy (STM) and tuning-fork-based noncontact atomic force microscopy (NC-AFM) were used to explore the system experimentally. Regular flower-like cyclic aggregates consisting of six azahelicenes were observed. Computational chemistry methods were then applied to estimate the structure of the observed molecular clusters. (více ...)
