@article{WirthHatterDrostetal.2015, author = {Wirth, Jonas and Hatter, Nino and Drost, Robert and Umbach, Tobias R. and Barja, Sara and Zastrow, Matthias and R{\"u}ck-Braun, Karola and Pascual, Jose Ignacio and Saalfrank, Peter and Franke, Katharina J.}, title = {Diarylethene Molecules on a Ag(111) Surface: Stability and Electron-Induced Switching}, series = {The journal of physical chemistry : C, Nanomaterials and interfaces}, volume = {119}, journal = {The journal of physical chemistry : C, Nanomaterials and interfaces}, number = {9}, publisher = {American Chemical Society}, address = {Washington}, issn = {1932-7447}, doi = {10.1021/jp5122036}, pages = {4874 -- 4883}, year = {2015}, abstract = {Diarylethene derivatives are photochromic molecular switches, undergoing a ring-opening/-closing reaction by illumination with light. The symmetry of the closed form is determined by the WoodWard Hoffinann rules according to which the reaction proceeds by corirotatory rotation -in that case. Here, we show by a cOrnbined approach of scanning tunneling microscopy (STM) and density functional theory (DFT) calculations that the Open isomer of 4,4'-(4,4'-(perfluorocydopent-1-ene-1,2-diyl)bis(5-methyl-thiophent-4,2,4-dipyridine) (PDTE) retains its open form upon adsorption on a Ag(111) surface. It caribe switched into a closed form, which we identify as the digrotatOly cydization product, by controlled manipulation 'With the STM tip, Evidence of an electric-field dependent switching-process 'is interpreted on the basis of a Simple electroStatic Model, which suggests that the reaction proceedS via an "upright" intermediate state. This pathway thus strongly differs from the switching reaction in solution.}, language = {en} }