On the energetics of conformational switching of molecules at and close to room temperature

Journal article
(Original article)


Publication Details

Author(s): Ditze S, Stark M, Buchner F, Aichert A, Jux N, Luckas N, Görling A, Hieringer W, Hornegger J, Steinrück HP, Marbach H
Journal: Journal of the American Chemical Society
Publisher: American Chemical Society
Publication year: 2014
Volume: 136
Journal issue: 4
Pages range: 1609-1616
ISSN: 0002-7863
Language: English


Abstract


We observe and induce conformational switching of individual molecules via scanning tunneling microscopy (STM) at and close to room temperature. 2H-5,10,15,20-Tetrakis-(3,5-di-tert-butyl)-phenylporphyrin adsorbed on Cu(111) forms a peculiar supramolecular ordered phase in which the molecules arrange in alternating rows, with two distinct appearances in STM which are assigned to concave and convex intramolecular conformations. Around room temperature, frequent bidirectional conformational switching of individual molecules from concave to convex and vice versa is observed. From the temperature dependence, detailed insights into the energy barriers and entropic contributions of the switching processes are deduced. At 200 K, controlled STM tip-induced unidirectional switching is possible, yielding an information storage density of 4.9 × 10 bit/inch. With this contribution we demonstrate that controlled switching of individual molecules at comparably high temperatures is possible and that entropic effects can be a decisive factor in potential molecular devices at these temperatures. © 2014 American Chemical Society.



FAU Authors / FAU Editors

Aichert, André
Lehrstuhl für Informatik 5 (Mustererkennung)
Ditze, Stefanie Dr.
Lehrstuhl für Physikalische Chemie II
Görling, Andreas Prof. Dr.
Lehrstuhl für Theoretische Chemie
Hieringer, Wolfgang PD Dr.
Lehrstuhl für Theoretische Chemie
Hornegger, Joachim Prof. Dr.-Ing.
Lehrstuhl für Informatik 5 (Mustererkennung)
Jux, Norbert Prof. Dr.
Interdisziplinäres Zentrum für Molekulare Materialien
Luckas, Nicola
Lehrstuhl für Theoretische Chemie
Marbach, Hubertus PD Dr.
Lehrstuhl für Experimentalphysik
Stark, Michael
Sonderforschungsbereich 953/2 Synthetische Kohlenstoffallotrope
Steinrück, Hans-Peter Prof. Dr.
Lehrstuhl für Physikalische Chemie II


Additional Organisation
Exzellenz-Cluster Engineering of Advanced Materials


How to cite

APA:
Ditze, S., Stark, M., Buchner, F., Aichert, A., Jux, N., Luckas, N.,... Marbach, H. (2014). On the energetics of conformational switching of molecules at and close to room temperature. Journal of the American Chemical Society, 136(4), 1609-1616. https://dx.doi.org/10.1021/ja411884p

MLA:
Ditze, Stefanie, et al. "On the energetics of conformational switching of molecules at and close to room temperature." Journal of the American Chemical Society 136.4 (2014): 1609-1616.

BibTeX: 

Last updated on 2018-19-04 at 02:31