| 43162 |
Creator |
c3baa1aae2495d9fcf383c433b46bfe0 |
| 43162 |
Creator |
ext-472347a2d4ffa93fc75feef296393e17 |
| 43162 |
Creator |
ext-53e357e26f04c97cf3de9a05f1792f4d |
| 43162 |
Creator |
ext-74fc1a63fe35e47fb227df08305452c2 |
| 43162 |
Creator |
ext-6d95d3c4313ee5d560bd394d1916c045 |
| 43162 |
Creator |
ext-d45b6304bc084ad1afd3f713a245a24a |
| 43162 |
Date |
2013-07-14 |
| 43162 |
Is Part Of |
p14639076 |
| 43162 |
Is Part Of |
repository |
| 43162 |
abstract |
Self-assembled monolayers (SAMs) containing azobenzene moieties are very attractive
for a wide range of applications, including molecular electronics and photonics, bio-interface
engineering and sensoring. However, very little is known about the aggregation and
photoswitching behavior that azobenzene units undergo during the SAM formation process.
Here, we demonstrate that the formation of thiol based SAMs containing azobenzenes
(denoted as <b>AzoSH</b>) on gold surfaces is characterised by a two step adsorption
kinetics, while a three-step assembly process has been identified for dithiolane-based
SAMs containing azobenzenes (denoted <b>AzoSS</b>). The H-aggregation on the <b>AzoSS</b>
SAMs was found to be remarkably dependent on the time of self-assembly, with less
aggregation as a function of time. While photoisomerization of the <b>AzoSH</b> was
suppressed for all different assembly times, the reversible trans–cis photoisomerization
of <b>AzoSS</b> SAMs formed over 24 hours was clearly observed upon alternating UV
and Vis light irradiation. We contend that detailed information on formation kinetics
and related optical properties is of crucial importance for elucidating the photoswitching
capabilities of azobenzene based SAMs. |
| 43162 |
authorList |
authors |
| 43162 |
issue |
26 |
| 43162 |
status |
peerReviewed |
| 43162 |
uri |
http://data.open.ac.uk/oro/document/313544 |
| 43162 |
uri |
http://data.open.ac.uk/oro/document/313557 |
| 43162 |
uri |
http://data.open.ac.uk/oro/document/313558 |
| 43162 |
uri |
http://data.open.ac.uk/oro/document/313559 |
| 43162 |
uri |
http://data.open.ac.uk/oro/document/313560 |
| 43162 |
uri |
http://data.open.ac.uk/oro/document/313561 |
| 43162 |
uri |
http://data.open.ac.uk/oro/document/315224 |
| 43162 |
volume |
15 |
| 43162 |
type |
AcademicArticle |
| 43162 |
type |
Article |
| 43162 |
label |
Yeung, Chun L.; Charlesworth, Scott; Iqbal, Parvez; Bowen, James ; Preece, Jon
A. and Mendes, Paula M. (2013). Different formation kinetics and photoisomerization
behavior of self-assembled monolayers of thiols and dithiolanes bearing azobenzene
moieties. Physical Chemistry Chemical Physics, 15(26) pp. 11014–11024. |
| 43162 |
label |
Yeung, Chun L.; Charlesworth, Scott; Iqbal, Parvez; Bowen, James ; Preece, Jon A.
and Mendes, Paula M. (2013). Different formation kinetics and photoisomerization
behavior of self-assembled monolayers of thiols and dithiolanes bearing azobenzene
moieties. Physical Chemistry Chemical Physics, 15(26) pp. 11014–11024. |
| 43162 |
Title |
Different formation kinetics and photoisomerization behavior of self-assembled monolayers
of thiols and dithiolanes bearing azobenzene moieties |
| 43162 |
in dataset |
oro |