Temperature Dependence of Ultra-Exothermic Charge Recombinations13
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/10316/8237 https://doi.org/10.1002/cphc.200600467 |
Resumo: | We measured the temperature dependence (from +32 to -50 °C) of charge-recombination rates between contact radical ion pairs in isopropyl ether. In the systems selected for this study, aromatic hydrocarbon cations are the electron acceptors and the fumaronitrile anion is the electron donor. Nearly quantitative electron transfers occur at all temperatures. The charge recombinations have excess exothermicities of -60 kcal mol-1 and exhibit a very weak temperature dependence. Our observations emphasize the absence of solvent effects and the relevance of nuclear tunneling in charge recombinations. |
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Temperature Dependence of Ultra-Exothermic Charge Recombinations13We measured the temperature dependence (from +32 to -50 °C) of charge-recombination rates between contact radical ion pairs in isopropyl ether. In the systems selected for this study, aromatic hydrocarbon cations are the electron acceptors and the fumaronitrile anion is the electron donor. Nearly quantitative electron transfers occur at all temperatures. The charge recombinations have excess exothermicities of -60 kcal mol-1 and exhibit a very weak temperature dependence. Our observations emphasize the absence of solvent effects and the relevance of nuclear tunneling in charge recombinations.2006info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10316/8237http://hdl.handle.net/10316/8237https://doi.org/10.1002/cphc.200600467engChemPhysChem. 7:12 (2006) 2533-2539Serpa, CarlosGomes, Paulo J. S.Arnaut, Luis G.Melo, J. Seixas deFormosinho, Sebastião J.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:RCAAP2020-03-09T10:33:24Zoai:estudogeral.uc.pt:10316/8237Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T21:01:25.534514Repositório 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 |
Temperature Dependence of Ultra-Exothermic Charge Recombinations13 |
title |
Temperature Dependence of Ultra-Exothermic Charge Recombinations13 |
spellingShingle |
Temperature Dependence of Ultra-Exothermic Charge Recombinations13 Serpa, Carlos |
title_short |
Temperature Dependence of Ultra-Exothermic Charge Recombinations13 |
title_full |
Temperature Dependence of Ultra-Exothermic Charge Recombinations13 |
title_fullStr |
Temperature Dependence of Ultra-Exothermic Charge Recombinations13 |
title_full_unstemmed |
Temperature Dependence of Ultra-Exothermic Charge Recombinations13 |
title_sort |
Temperature Dependence of Ultra-Exothermic Charge Recombinations13 |
author |
Serpa, Carlos |
author_facet |
Serpa, Carlos Gomes, Paulo J. S. Arnaut, Luis G. Melo, J. Seixas de Formosinho, Sebastião J. |
author_role |
author |
author2 |
Gomes, Paulo J. S. Arnaut, Luis G. Melo, J. Seixas de Formosinho, Sebastião J. |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Serpa, Carlos Gomes, Paulo J. S. Arnaut, Luis G. Melo, J. Seixas de Formosinho, Sebastião J. |
description |
We measured the temperature dependence (from +32 to -50 °C) of charge-recombination rates between contact radical ion pairs in isopropyl ether. In the systems selected for this study, aromatic hydrocarbon cations are the electron acceptors and the fumaronitrile anion is the electron donor. Nearly quantitative electron transfers occur at all temperatures. The charge recombinations have excess exothermicities of -60 kcal mol-1 and exhibit a very weak temperature dependence. Our observations emphasize the absence of solvent effects and the relevance of nuclear tunneling in charge recombinations. |
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/10316/8237 http://hdl.handle.net/10316/8237 https://doi.org/10.1002/cphc.200600467 |
url |
http://hdl.handle.net/10316/8237 https://doi.org/10.1002/cphc.200600467 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
ChemPhysChem. 7:12 (2006) 2533-2539 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799133905782046720 |