elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Switching of an Azobenzene-Tripod Molecule on Ag(111)

Scheil, K. and Gopakumar, T. G. and Bahrenburg, J. and Temps, F. and Maurer, R. J. and Reuter, K. and Berndt, R. (2016) Switching of an Azobenzene-Tripod Molecule on Ag(111). Journal of Physical Chemistry Letters, 2016 (7), pp. 2080-2084. ACS Publications. DOI: 10.1021/acs.jpclett.6b01011 ISSN 1948-7185

[img] PDF
3MB

Abstract

The trans-cis isomerization makes azobenzene (AB) a robust molecular switch. Once adsorbed to a metal, however, the switching is inefficient or absent due to rapid excited-state quenching or loss of the trans-cis bistability. We find that tris-[4-(phenylazo)-phenyl]-amine is a rather efficient switch on Ag(111). Using scanning tunneling and atomic force microscopy at submolecular resolution along with density functional theory calculations, we show that the switching process is no trans-cis isomerization but rather a reorientation of the N-N bond of an AB unit. It proceeds through a twisting motion of the azo-bridge that leads to a lateral shift of a phenyl ring. Thus, the role of the Ag substrate is ambivalent. While it suppresses the original bistability of the azobenzene units, it creates a new one by inducing a barrier for the rotation of the N-N bond.

Item URL in elib:https://elib.dlr.de/104446/
Document Type:Article
Title:Switching of an Azobenzene-Tripod Molecule on Ag(111)
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Scheil, K.Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität, 24098 Kiel, GermanyUNSPECIFIED
Gopakumar, T. G.Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, IndiaUNSPECIFIED
Bahrenburg, J.Institut für Physikalische Chemie, Christian-Albrechts-Universität, 24098 Kiel, GermanyUNSPECIFIED
Temps, F.Institut für Physikalische Chemie, Christian-Albrechts-Universität, 24098 Kiel, GermanyUNSPECIFIED
Maurer, R. J.Lehrstuhl für Theoretische Chemie, Technische Unversität München, 85747 Garching, GermanyUNSPECIFIED
Reuter, K.Lehrstuhl für Theoretische Chemie, Technische Unversität München, 85747 Garching, GermanyUNSPECIFIED
Berndt, R.Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität, 24098 Kiel, GermanyUNSPECIFIED
Date:19 May 2016
Journal or Publication Title:Journal of Physical Chemistry Letters
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:2016
DOI :10.1021/acs.jpclett.6b01011
Page Range:pp. 2080-2084
Publisher:ACS Publications
ISSN:1948-7185
Status:Published
Keywords:trans-cis isomerization, azobenzene, Ag(111), scanning tunneling microscopy, atomic force microscopy
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Laser Research and Technology
Location: Stuttgart
Institutes and Institutions:Institute of Technical Physics
Deposited By: Bahrenburg, Julia
Deposited On:21 Jun 2016 13:29
Last Modified:31 Jul 2019 20:01

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.