Nanopatterns of molecular spoked wheels as giant homologues of benzene tricarboxylic acids.

ABSTRACT: Molecular spoked wheels with D _3h and C _s symmetry are synthesized by Vollhardt trimerization of C _2v-symmetric dumbbell structures with central acetylene units and subsequent intramolecular ring closure. Scanning tunneling microscopy of the D _3h-symmetric species at the solid/liquid interface on graphite reveals triporous chiral honeycomb nanopatterns in which the alkoxy side chains dominate the packing over the carboxylic acid groups, which remain unpaired. In contrast, C _s-symmetric isomers partially allow for pairing of the carboxylic acids, which therefore act as a probe for the reduced alkoxy chain nanopattern stabilization. This observation also reflects the adsorbate substrate symmetry mismatc

SUBMITTER: Keller TJ 

PROVIDER: S-EPMC8278972 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature