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

Mingyi Xie, Marina V. Kuzimenkova, Per Olof Larsson, Yuxi Tian, Ivan G. Scheblykin

Research output: Contribution to journalReview articlepeer-review

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.)

Original languageEnglish
Pages (from-to)2536-2544
Number of pages9
JournalChinese Journal of Chemistry
Volume41
Issue number19
DOIs
Publication statusPublished - 2023 Oct

Subject classification (UKÄ)

  • Atom and Molecular Physics and Optics
  • Physical Chemistry

Free keywords

  • Brightness
  • Fluorescence
  • MEH-PPV
  • Molecular weight
  • Single molecule spectroscopy

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