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Dark Photoswitching Induces Coulomb Blockade Diamond Collapse

Olsen, Stine T.; Hansen, Thorsten LU and Mikkelsen, Kurt V. (2015) In Journal of Physical Chemistry C 119(27). p.14829-14833
Abstract
A derivative of the photochromic molecule dihydroazulene (DHA) undergoes bias-induced switching into its vinylheptafulvene (VHF) conformation when inserted into a silver junction. This dark switching mechanism, which induces a collapse of the Coulomb blockade diamonds, is explained by quantum calculations on the molecular transport junction. Analysis of the nonequilibrium populations of molecular redox states explains the observed bias threshold. Predictions are made that another DHA derivative will not, in future experiments, exhibit bias-induced switching. Thus, the dark switching mechanism depends on the structure of the photoswitch. The methodology applies to any molecular junction and offers a versatile tool for answering mechanistic... (More)
A derivative of the photochromic molecule dihydroazulene (DHA) undergoes bias-induced switching into its vinylheptafulvene (VHF) conformation when inserted into a silver junction. This dark switching mechanism, which induces a collapse of the Coulomb blockade diamonds, is explained by quantum calculations on the molecular transport junction. Analysis of the nonequilibrium populations of molecular redox states explains the observed bias threshold. Predictions are made that another DHA derivative will not, in future experiments, exhibit bias-induced switching. Thus, the dark switching mechanism depends on the structure of the photoswitch. The methodology applies to any molecular junction and offers a versatile tool for answering mechanistic questions. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Physical Chemistry C
volume
119
issue
27
pages
14829 - 14833
publisher
The American Chemical Society
external identifiers
  • wos:000357964900002
  • scopus:84936876208
ISSN
1932-7447
DOI
10.1021/acs.jpcc.5b00849
language
English
LU publication?
yes
id
c60829a5-f27c-4900-95cd-e17485e2052b (old id 7783648)
date added to LUP
2015-09-07 12:40:42
date last changed
2017-08-20 03:24:19
@article{c60829a5-f27c-4900-95cd-e17485e2052b,
  abstract     = {A derivative of the photochromic molecule dihydroazulene (DHA) undergoes bias-induced switching into its vinylheptafulvene (VHF) conformation when inserted into a silver junction. This dark switching mechanism, which induces a collapse of the Coulomb blockade diamonds, is explained by quantum calculations on the molecular transport junction. Analysis of the nonequilibrium populations of molecular redox states explains the observed bias threshold. Predictions are made that another DHA derivative will not, in future experiments, exhibit bias-induced switching. Thus, the dark switching mechanism depends on the structure of the photoswitch. The methodology applies to any molecular junction and offers a versatile tool for answering mechanistic questions.},
  author       = {Olsen, Stine T. and Hansen, Thorsten and Mikkelsen, Kurt V.},
  issn         = {1932-7447},
  language     = {eng},
  number       = {27},
  pages        = {14829--14833},
  publisher    = {The American Chemical Society},
  series       = {Journal of Physical Chemistry C},
  title        = {Dark Photoswitching Induces Coulomb Blockade Diamond Collapse},
  url          = {http://dx.doi.org/10.1021/acs.jpcc.5b00849},
  volume       = {119},
  year         = {2015},
}