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Diarylethene Molecules on a Ag(111) Surface: Stability and Electron-Induced Switching

  • 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.

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Author:Jonas Wirth, Nino Hatter, Robert Drost, Tobias R. Umbach, Sara Barja, Matthias Zastrow, Karola Rück-Braun, Jose Ignacio Pascual, Peter SaalfrankORCiDGND, Katharina J. Franke
ISSN:1932-7447 (print)
Parent Title (English):The journal of physical chemistry : C, Nanomaterials and interfaces
Publisher:American Chemical Society
Place of publication:Washington
Document Type:Article
Year of first Publication:2015
Year of Completion:2015
Release Date:2017/03/27
First Page:4874
Last Page:4883
Funder:Deutsche Forschungsgemeinschaft [Sonderforschungsbereich 658, FR2726/4]; FU Berlin by FPU [AP-2007-001157]
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie
Peer Review:Referiert