Influence of magnetic field on delayed fluorescence of coumarin dye in Langmuir-Blodgett films

N. Kh Ibrayev, D. A. Afanasyev

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The triplet-triplet annihilation (TTA) was studied in mixed Langmuir-Blodgett films of 7-decyloxy-3 (4′-ethoxyphenyl)-coumarin molecules and palmitic acid. The thermal activation of the TTA process is observed due to the inhomogeneous broadening of triplet energy levels. Modulation of the TTA rate constant in the external magnetic field for the multilayer films shows the dependence that is characteristic of crystals. Only negative magnetic effect is observed for the monolayers. Time dependence of the magnetic effect in conditions of high rate constant of triplet excitons migration is connected with the dominating contribution of ordered clusters or randomly oriented molecule clusters into the TTA process.

Original languageEnglish
Pages (from-to)39-45
Number of pages7
JournalChemical Physics Letters
Volume538
DOIs
Publication statusPublished - 11 Jun 2012
Externally publishedYes

Fingerprint

magnetic effects
Langmuir Blodgett films
Langmuir-Blodgett films
Rate constants
Coloring Agents
dyes
Fluorescence
palmitic acid
Magnetic fields
fluorescence
Molecules
Palmitic Acid
Multilayer films
magnetic fields
Electron energy levels
time dependence
molecules
Monolayers
energy levels
Chemical activation

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

Influence of magnetic field on delayed fluorescence of coumarin dye in Langmuir-Blodgett films. / Ibrayev, N. Kh; Afanasyev, D. A.

In: Chemical Physics Letters, Vol. 538, 11.06.2012, p. 39-45.

Research output: Contribution to journalArticle

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