(More) About biphenyl first excited triplet state energy
Autor(a) principal: | |
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Data de Publicação: | 2006 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10316/5068 https://doi.org/10.1016/j.jphotochem.2006.04.020 |
Resumo: | Biphenyl photophysics was extensively studied in the past and much attention was given to the measurement of its first excited triplet state energy. Phosphorescence and the corresponding T1 <-- S0 absorption give triplet energies that differ by 10 kcal mol-1. We revisited biphenyl photophysics using photoacoustic calorimetry (PAC), a technique that directly measures the thermochemistry and kinetics of short-lived transients in solution. PAC measurements give the relaxed biphenyl triplet energy of 67.8 ± 0.6 kcal mol-1; 2.3 kcal mol-1 higher than the spectroscopic value. The direct measurement of the biphenyl relaxed triplet energy reported in this work should resolve the continued misuse of its spectroscopic energy, in particular in the growing field of polyphenylene polymers. |
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(More) About biphenyl first excited triplet state energyPhotoacoustic calorimetryTriplet energyBiphenylEnergy transferBiphenyl photophysics was extensively studied in the past and much attention was given to the measurement of its first excited triplet state energy. Phosphorescence and the corresponding T1 <-- S0 absorption give triplet energies that differ by 10 kcal mol-1. We revisited biphenyl photophysics using photoacoustic calorimetry (PAC), a technique that directly measures the thermochemistry and kinetics of short-lived transients in solution. PAC measurements give the relaxed biphenyl triplet energy of 67.8 ± 0.6 kcal mol-1; 2.3 kcal mol-1 higher than the spectroscopic value. The direct measurement of the biphenyl relaxed triplet energy reported in this work should resolve the continued misuse of its spectroscopic energy, in particular in the growing field of polyphenylene polymers.http://www.sciencedirect.com/science/article/B6TGY-4JTXCSD-B/1/ca745f27500ae8609414c7d3a5d2e5dd2006info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleaplication/PDFhttp://hdl.handle.net/10316/5068http://hdl.handle.net/10316/5068https://doi.org/10.1016/j.jphotochem.2006.04.020engJournal of Photochemistry and Photobiology A: Chemistry. 184:1-2 (2006) 228-233Gomes, Paulo J. S.Serpa, CarlosArnaut, Luís G.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2020-11-06T16:49:11Zoai:estudogeral.uc.pt:10316/5068Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T21:01:35.897662Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
(More) About biphenyl first excited triplet state energy |
title |
(More) About biphenyl first excited triplet state energy |
spellingShingle |
(More) About biphenyl first excited triplet state energy Gomes, Paulo J. S. Photoacoustic calorimetry Triplet energy Biphenyl Energy transfer |
title_short |
(More) About biphenyl first excited triplet state energy |
title_full |
(More) About biphenyl first excited triplet state energy |
title_fullStr |
(More) About biphenyl first excited triplet state energy |
title_full_unstemmed |
(More) About biphenyl first excited triplet state energy |
title_sort |
(More) About biphenyl first excited triplet state energy |
author |
Gomes, Paulo J. S. |
author_facet |
Gomes, Paulo J. S. Serpa, Carlos Arnaut, Luís G. |
author_role |
author |
author2 |
Serpa, Carlos Arnaut, Luís G. |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Gomes, Paulo J. S. Serpa, Carlos Arnaut, Luís G. |
dc.subject.por.fl_str_mv |
Photoacoustic calorimetry Triplet energy Biphenyl Energy transfer |
topic |
Photoacoustic calorimetry Triplet energy Biphenyl Energy transfer |
description |
Biphenyl photophysics was extensively studied in the past and much attention was given to the measurement of its first excited triplet state energy. Phosphorescence and the corresponding T1 <-- S0 absorption give triplet energies that differ by 10 kcal mol-1. We revisited biphenyl photophysics using photoacoustic calorimetry (PAC), a technique that directly measures the thermochemistry and kinetics of short-lived transients in solution. PAC measurements give the relaxed biphenyl triplet energy of 67.8 ± 0.6 kcal mol-1; 2.3 kcal mol-1 higher than the spectroscopic value. The direct measurement of the biphenyl relaxed triplet energy reported in this work should resolve the continued misuse of its spectroscopic energy, in particular in the growing field of polyphenylene polymers. |
publishDate |
2006 |
dc.date.none.fl_str_mv |
2006 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10316/5068 http://hdl.handle.net/10316/5068 https://doi.org/10.1016/j.jphotochem.2006.04.020 |
url |
http://hdl.handle.net/10316/5068 https://doi.org/10.1016/j.jphotochem.2006.04.020 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of Photochemistry and Photobiology A: Chemistry. 184:1-2 (2006) 228-233 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
aplication/PDF |
dc.source.none.fl_str_mv |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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