Excited-state dynamics of polyfluorene derivatives in solution (2008)
- Authors:
- Autor USP: GEHLEN, MARCELO HENRIQUE - IQSC
- Unidade: IQSC
- Assunto: FÍSICO-QUÍMICA
- Language: Inglês
- Abstract: The excited-state dynamics of two polyfluorene copolymers, one fully conjugated containing phenylene vinylene units alternated with 9,9'-dihexylfluorenyl groups and the other segmented by -(CH2)8- spacer, were studied in dilute solution of different solvents using a picosecond single-photon timing technique. The excited-state dynamics of the segmented copolymer follows the Fo¨rster resonant energy-transfer model which describes intrachain energy-transfer kinetics among random oriented chromophores. Energy transfer is confirmed by analysis of fluorescence anisotropy relaxation with the measurement of a short decay component of about 60 ps. The fluorescence decay surface of the fully conjugated copolymer is biexponential with decay times of about 470 and 900 ps, ascribed to deactivation of chain moieties containing trans and cis isomers already in a photostationary condition. Thus, energy transfer is very fast due to the conjugated nature and rigid-rod-like structure of this copolymer chain
- Imprenta:
- Publisher place: Washington
- Date published: 2008
- Source:
- Título do periódico: The Journal of Physical Chemistry A
- ISSN: 1089-5639
- Volume/Número/Paginação/Ano: v. 112, n. 23, p. 5054-5059, 2008
-
ABNT
SIMAS, Emanuelle R et al. Excited-state dynamics of polyfluorene derivatives in solution. The Journal of Physical Chemistry A, v. 112, n. 23, p. 5054-5059, 2008Tradução . . Disponível em: http://pubs.acs.org/cgi-bin/article.cgi/jpcafh/2008/112/i23/pdf/jp711934d.pdf. Acesso em: 18 set. 2024. -
APA
Simas, E. R., Gehlen, M. H., Glogauer, A., & Akcelrud, L. (2008). Excited-state dynamics of polyfluorene derivatives in solution. The Journal of Physical Chemistry A, 112( 23), 5054-5059. Recuperado de http://pubs.acs.org/cgi-bin/article.cgi/jpcafh/2008/112/i23/pdf/jp711934d.pdf -
NLM
Simas ER, Gehlen MH, Glogauer A, Akcelrud L. Excited-state dynamics of polyfluorene derivatives in solution [Internet]. The Journal of Physical Chemistry A. 2008 ; 112( 23): 5054-5059.[citado 2024 set. 18 ] Available from: http://pubs.acs.org/cgi-bin/article.cgi/jpcafh/2008/112/i23/pdf/jp711934d.pdf -
Vancouver
Simas ER, Gehlen MH, Glogauer A, Akcelrud L. Excited-state dynamics of polyfluorene derivatives in solution [Internet]. The Journal of Physical Chemistry A. 2008 ; 112( 23): 5054-5059.[citado 2024 set. 18 ] Available from: http://pubs.acs.org/cgi-bin/article.cgi/jpcafh/2008/112/i23/pdf/jp711934d.pdf - Fluorescence quenching in clusters of reverse micelles
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