Photophysical properties and quantum chemical studies of poly(2,7-9,9'-dihexylfluorene-dyil)
Main Author: | |
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Publication Date: | 2009 |
Other Authors: | , , , , , |
Format: | Article |
Language: | eng |
Source: | Journal of the Brazilian Chemical Society (Online) |
Download full: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532009000100024 |
Summary: | This work reports the photophysical properties (excitation and fluorescence spectra, fluorescence quantum yield, fluorescence lifetimes) of the poly(2,7-9,9'-dihexylfluorene-dyil) in dilute solutions of four solvents (toluene, tetrahydrofuran, chloroform and ethyl acetate) as well as the properties in solid state. Photoluminescence showed spectra characteristic of disordered α-backbone chain conformation. Simulation of the electronic absorption spectra of oligomers containing 1 to 11 mers showed that the critical conjugation length is between 6 and 7 mers. We also estimated the theoretical dipole moments which indicated that a coil conformation is formed with 8 repeating units per turn. We also showed that some energy transfer process appears in solid state which decreases the emission lifetime. Furthermore, based on luminescent response of the systems herein studied and electroluminescent behavior reported on literature, both photo and electroluminescence emissions arise from the same emissive units. |
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Photophysical properties and quantum chemical studies of poly(2,7-9,9'-dihexylfluorene-dyil)polyfluorenephotophysical propertiesquantum mechanical calculationphotoluminescenceThis work reports the photophysical properties (excitation and fluorescence spectra, fluorescence quantum yield, fluorescence lifetimes) of the poly(2,7-9,9'-dihexylfluorene-dyil) in dilute solutions of four solvents (toluene, tetrahydrofuran, chloroform and ethyl acetate) as well as the properties in solid state. Photoluminescence showed spectra characteristic of disordered α-backbone chain conformation. Simulation of the electronic absorption spectra of oligomers containing 1 to 11 mers showed that the critical conjugation length is between 6 and 7 mers. We also estimated the theoretical dipole moments which indicated that a coil conformation is formed with 8 repeating units per turn. We also showed that some energy transfer process appears in solid state which decreases the emission lifetime. Furthermore, based on luminescent response of the systems herein studied and electroluminescent behavior reported on literature, both photo and electroluminescence emissions arise from the same emissive units.Sociedade Brasileira de Química2009-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532009000100024Journal of the Brazilian Chemical Society v.20 n.1 2009reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532009000100024info:eu-repo/semantics/openAccessOliveira,Hueder P. M.Martins,Tatiana D.Honório,Kathia M.Rodrigues,Paula C.Akcelrud,LeniSilva,Albérico B. F.Atvars,Teresa D. Z.eng2009-01-14T00:00:00Zoai:scielo:S0103-50532009000100024Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2009-01-14T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false |
dc.title.none.fl_str_mv |
Photophysical properties and quantum chemical studies of poly(2,7-9,9'-dihexylfluorene-dyil) |
title |
Photophysical properties and quantum chemical studies of poly(2,7-9,9'-dihexylfluorene-dyil) |
spellingShingle |
Photophysical properties and quantum chemical studies of poly(2,7-9,9'-dihexylfluorene-dyil) Oliveira,Hueder P. M. polyfluorene photophysical properties quantum mechanical calculation photoluminescence |
title_short |
Photophysical properties and quantum chemical studies of poly(2,7-9,9'-dihexylfluorene-dyil) |
title_full |
Photophysical properties and quantum chemical studies of poly(2,7-9,9'-dihexylfluorene-dyil) |
title_fullStr |
Photophysical properties and quantum chemical studies of poly(2,7-9,9'-dihexylfluorene-dyil) |
title_full_unstemmed |
Photophysical properties and quantum chemical studies of poly(2,7-9,9'-dihexylfluorene-dyil) |
title_sort |
Photophysical properties and quantum chemical studies of poly(2,7-9,9'-dihexylfluorene-dyil) |
author |
Oliveira,Hueder P. M. |
author_facet |
Oliveira,Hueder P. M. Martins,Tatiana D. Honório,Kathia M. Rodrigues,Paula C. Akcelrud,Leni Silva,Albérico B. F. Atvars,Teresa D. Z. |
author_role |
author |
author2 |
Martins,Tatiana D. Honório,Kathia M. Rodrigues,Paula C. Akcelrud,Leni Silva,Albérico B. F. Atvars,Teresa D. Z. |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Oliveira,Hueder P. M. Martins,Tatiana D. Honório,Kathia M. Rodrigues,Paula C. Akcelrud,Leni Silva,Albérico B. F. Atvars,Teresa D. Z. |
dc.subject.por.fl_str_mv |
polyfluorene photophysical properties quantum mechanical calculation photoluminescence |
topic |
polyfluorene photophysical properties quantum mechanical calculation photoluminescence |
description |
This work reports the photophysical properties (excitation and fluorescence spectra, fluorescence quantum yield, fluorescence lifetimes) of the poly(2,7-9,9'-dihexylfluorene-dyil) in dilute solutions of four solvents (toluene, tetrahydrofuran, chloroform and ethyl acetate) as well as the properties in solid state. Photoluminescence showed spectra characteristic of disordered α-backbone chain conformation. Simulation of the electronic absorption spectra of oligomers containing 1 to 11 mers showed that the critical conjugation length is between 6 and 7 mers. We also estimated the theoretical dipole moments which indicated that a coil conformation is formed with 8 repeating units per turn. We also showed that some energy transfer process appears in solid state which decreases the emission lifetime. Furthermore, based on luminescent response of the systems herein studied and electroluminescent behavior reported on literature, both photo and electroluminescence emissions arise from the same emissive units. |
publishDate |
2009 |
dc.date.none.fl_str_mv |
2009-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532009000100024 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532009000100024 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0103-50532009000100024 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
dc.source.none.fl_str_mv |
Journal of the Brazilian Chemical Society v.20 n.1 2009 reponame:Journal of the Brazilian Chemical Society (Online) instname:Sociedade Brasileira de Química (SBQ) instacron:SBQ |
instname_str |
Sociedade Brasileira de Química (SBQ) |
instacron_str |
SBQ |
institution |
SBQ |
reponame_str |
Journal of the Brazilian Chemical Society (Online) |
collection |
Journal of the Brazilian Chemical Society (Online) |
repository.name.fl_str_mv |
Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ) |
repository.mail.fl_str_mv |
||office@jbcs.sbq.org.br |
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1750318169450348544 |