Mechanical compression in cofacial porphyrin cyclophane pincers.

ABSTRACT: Intra- and intermolecular interactions are dominating chemical processes, and their concerted interplay enables complex nonequilibrium states like life. While the responsible basic forces are typically investigated spectroscopically, a conductance measurement to probe and control these interactions in a single molecule far out of equilibrium is reported here. Specifically, by separating macroscopic metal electrodes, two π-conjugated, bridge-connected porphyrin decks are peeled off on one side, but compressed on the other side due to the covalent mechanical fixation. We observe that the conductance response shows an exceptional exponential rise by two orders of magnitude in individual breaking events during the stretching. Theoretical studies atomistically explain the measured conductance b

SUBMITTER: Hsu C 

PROVIDER: S-EPMC9278344 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature