Cited by 65Organic Electronics and PhotovoltaicsOrganic Light-Emitting Diodes ResearchAdvanced Fluorescence Microscopy Techniques

Molecular weight dependence of emission intensity and emitting sites distribution within single conjugated polymer molecules

Habuchi, Satoshi, Onda, Suguru, Vacha, Martin·2011·Phys. Chem. Chem. Phys.

Abstract

We investigated exciton migration, trapping and emission processes occurring within a single conjugated polymer molecule by means of superresolution fluorescence localization microscopy. This methodology allowed us to locate the spatial distribution of emitting sites within single chains with nanometre precision. The study was done on individual poly[2-methoxy-5-(2'-ethyl-hexyloxy)-1,4-phenylene vinylene] (MEH-PPV) molecules with average molecular weights ranging from 215,000 to 1,440,000 and with narrow weight distributions. We found that the mean emission intensity increases proportionally to the polymer molecular weight. The localization experiments suggest that the emitting sites are distributed nearly uniformly within a single chain and that the sites are on average 10 nm apart, irrespective of the molecular weight of the polymer. Furthermore, spatial contours formed by all the combined emitting sites within one chain show elongated shapes, in agreement with a rod-like structure of MEH-PPV in a collapsed state.

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Crossref · 10.1039/c0cp01729a

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Authors
Habuchi, S., Onda, S., & Vacha, M.
Affiliations
Tokyo Institute of Technology (JP)
Corresponding author
Habuchi, Satoshi
Venue
Phys. Chem. Chem. Phys.
Published
2011
Volume
13
Issue
5
Pages
1743-1753
ISSN
  • 1463-9076 (ISSN-L)
  • 1463-9084
OpenAlex
W2043448842
Cited by
65
References
77
Citations by year
2026: 1 · 2024: 3 · 2023: 2 · 2022: 2 · 2021: 2 · 2020: 4 · 2019: 4 · 2018: 4 · 2017: 4 · 2016: 4 · 2015: 5 · 2014: 7 · 2013: 11 · 2012: 4
FWCI
5.79
Type
journal article
Language
en
Open access
closed
Locations
  • Physical Chemistry Chemical Physics (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Organic Electronics and Photovoltaics
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Organic Light-Emitting Diodes Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biophysics › Advanced Fluorescence Microscopy Techniques
Keywords
MEH-PPV, conjugated polymers, molecular weight dependence, emission intensity, exciton migration, exciton trapping, chain conformation, rod structures

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