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Large spectral diffusion of conjugated polymer single molecule fluorescence at low temperature

Mirzov, Oleg LU ; Pullerits, Tönu LU ; Cichos, F; von Borczyskowski, C and Scheblykin, Ivan LU (2005) In Chemical Physics Letters 408(4-6). p.317-321
Abstract
The conductive polymer poly(2-methoxy-5-(2'-ethylhexyloxy)-1,4- phenylene vinylene) (MEH-PPV) was investigated by means of single molecule spectroscopy at 15 K. MEH-PPV single chains were deposited onto a surface from a toluene solution and covered with a polymer cap layer spin-coated from an aqueous solution for protection from air. The MEH-PPV molecules exhibited large fluorescence spectral diffusion with the range reaching 1000 cm(-1). We concluded that conformational changes, affecting dispersive interactions and conjugation length, is the most probable mechanism of the observed effect. It is the matrix-free environment that allows the MEH-PPV chains to undergo sufficiently large conformational changes even at low temperature. (c) 2005... (More)
The conductive polymer poly(2-methoxy-5-(2'-ethylhexyloxy)-1,4- phenylene vinylene) (MEH-PPV) was investigated by means of single molecule spectroscopy at 15 K. MEH-PPV single chains were deposited onto a surface from a toluene solution and covered with a polymer cap layer spin-coated from an aqueous solution for protection from air. The MEH-PPV molecules exhibited large fluorescence spectral diffusion with the range reaching 1000 cm(-1). We concluded that conformational changes, affecting dispersive interactions and conjugation length, is the most probable mechanism of the observed effect. It is the matrix-free environment that allows the MEH-PPV chains to undergo sufficiently large conformational changes even at low temperature. (c) 2005 Elsevier B.V. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Chemical Physics Letters
volume
408
issue
4-6
pages
317 - 321
publisher
Elsevier
external identifiers
  • wos:000229824700026
  • scopus:19744366677
ISSN
0009-2614
DOI
10.1016/j.cplett.2005.04.044
language
English
LU publication?
yes
id
47ed3000-a4b4-4cd7-9fdc-cca1d573a289 (old id 151901)
date added to LUP
2007-07-03 14:24:15
date last changed
2017-01-01 07:27:43
@article{47ed3000-a4b4-4cd7-9fdc-cca1d573a289,
  abstract     = {The conductive polymer poly(2-methoxy-5-(2'-ethylhexyloxy)-1,4- phenylene vinylene) (MEH-PPV) was investigated by means of single molecule spectroscopy at 15 K. MEH-PPV single chains were deposited onto a surface from a toluene solution and covered with a polymer cap layer spin-coated from an aqueous solution for protection from air. The MEH-PPV molecules exhibited large fluorescence spectral diffusion with the range reaching 1000 cm(-1). We concluded that conformational changes, affecting dispersive interactions and conjugation length, is the most probable mechanism of the observed effect. It is the matrix-free environment that allows the MEH-PPV chains to undergo sufficiently large conformational changes even at low temperature. (c) 2005 Elsevier B.V. All rights reserved.},
  author       = {Mirzov, Oleg and Pullerits, Tönu and Cichos, F and von Borczyskowski, C and Scheblykin, Ivan},
  issn         = {0009-2614},
  language     = {eng},
  number       = {4-6},
  pages        = {317--321},
  publisher    = {Elsevier},
  series       = {Chemical Physics Letters},
  title        = {Large spectral diffusion of conjugated polymer single molecule fluorescence at low temperature},
  url          = {http://dx.doi.org/10.1016/j.cplett.2005.04.044},
  volume       = {408},
  year         = {2005},
}