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Fluorescence of Single Conjugated Chains of MEH-PPV Dispersed in Polymer Matrix : What Do We See in the Microscope?†

Xie, Mingyi LU ; Kuzimenkova, Marina V. LU ; Larsson, Per Olof LU ; Tian, Yuxi LU and Scheblykin, Ivan G. LU orcid (2023) In Chinese Journal of Chemistry 41(19). p.2536-2544
Abstract

It has been a mystery that the detected fluorescence intensity of single MEH-PPV molecules is much lower than expected based on their chain length. In this review, after re-evaluating of the literature data in the light of new specially designed experiments, we present a comprehensive explanation of this issue: The actual size of MEH-PPV molecules at single molecule level is much smaller than expected due to de-aggregation and chain scission, while static quenching ("dark matter") also exists for large molecules, further reducing their brightness. (Figure presented.)

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author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Brightness, Fluorescence, MEH-PPV, Molecular weight, Single molecule spectroscopy
in
Chinese Journal of Chemistry
volume
41
issue
19
pages
9 pages
publisher
Wiley
external identifiers
  • scopus:85164740208
ISSN
1001-604X
DOI
10.1002/cjoc.202300144
language
English
LU publication?
yes
id
7cbbddd9-234c-4c4c-9d75-ee73191c867f
date added to LUP
2023-09-25 15:09:54
date last changed
2023-11-21 23:07:07
@article{7cbbddd9-234c-4c4c-9d75-ee73191c867f,
  abstract     = {{<p>It has been a mystery that the detected fluorescence intensity of single MEH-PPV molecules is much lower than expected based on their chain length. In this review, after re-evaluating of the literature data in the light of new specially designed experiments, we present a comprehensive explanation of this issue: The actual size of MEH-PPV molecules at single molecule level is much smaller than expected due to de-aggregation and chain scission, while static quenching ("dark matter") also exists for large molecules, further reducing their brightness. (Figure presented.)</p>}},
  author       = {{Xie, Mingyi and Kuzimenkova, Marina V. and Larsson, Per Olof and Tian, Yuxi and Scheblykin, Ivan G.}},
  issn         = {{1001-604X}},
  keywords     = {{Brightness; Fluorescence; MEH-PPV; Molecular weight; Single molecule spectroscopy}},
  language     = {{eng}},
  number       = {{19}},
  pages        = {{2536--2544}},
  publisher    = {{Wiley}},
  series       = {{Chinese Journal of Chemistry}},
  title        = {{Fluorescence of Single Conjugated Chains of MEH-PPV Dispersed in Polymer Matrix : What Do We See in the Microscope?<sup>†</sup>}},
  url          = {{http://dx.doi.org/10.1002/cjoc.202300144}},
  doi          = {{10.1002/cjoc.202300144}},
  volume       = {{41}},
  year         = {{2023}},
}