Comment on “Excited-State Intermolecular Proton Transfer of Lumazine”

Autores
Denofrio, Maria Paula; Thomas, Andrés Héctor; Braun, André M.; Oliveros, Esther; Lorente, Carolina
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
A critical comment on excited-state intermolar proton transfer of lumazine was discussed. In their article, Hupper and co-researchers reported the emission properties of lumazine (Lum) using steady-state and time-resolved emission techniques. They also reported the absorption spectra at different pH and they evaluated the pKa value in water to be about 10.5. Hupper do not mention how the pH was measured. The critic´s results on emission of Lum indicate that the fluorescence of Lum is quenched by hydroxide anions, and consequently, a decrease of the fluorescence is observed at pH higher than 10.5. Hupper and co-researchers did not refer the tautomerism of Lum, which implies different atoms participating in proton transfer they also postulate. Indeed, they discuss the inter-molecular proton transfer in the excited state of Lum, but they analyzed the tautomeric forms of Lum neither in the ground state nor in the excited state.
Fil: Denofrio, Maria Paula. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina
Fil: Thomas, Andrés Héctor. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina
Fil: Braun, André M.. Karlsruhe Institute of Technology; Alemania
Fil: Oliveros, Esther. Université Paul Sabatier; Francia
Fil: Lorente, Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina
Materia
Lumazine
Photochemistry
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/253692
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Comment on “Excited-State Intermolecular Proton Transfer of Lumazine”Denofrio, Maria PaulaThomas, Andrés HéctorBraun, André M.Oliveros, EstherLorente, CarolinaLumazinePhotochemistryhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1A critical comment on excited-state intermolar proton transfer of lumazine was discussed. In their article, Hupper and co-researchers reported the emission properties of lumazine (Lum) using steady-state and time-resolved emission techniques. They also reported the absorption spectra at different pH and they evaluated the pKa value in water to be about 10.5. Hupper do not mention how the pH was measured. The critic´s results on emission of Lum indicate that the fluorescence of Lum is quenched by hydroxide anions, and consequently, a decrease of the fluorescence is observed at pH higher than 10.5. Hupper and co-researchers did not refer the tautomerism of Lum, which implies different atoms participating in proton transfer they also postulate. Indeed, they discuss the inter-molecular proton transfer in the excited state of Lum, but they analyzed the tautomeric forms of Lum neither in the ground state nor in the excited state.Fil: Denofrio, Maria Paula. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; ArgentinaFil: Thomas, Andrés Héctor. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; ArgentinaFil: Braun, André M.. Karlsruhe Institute of Technology; AlemaniaFil: Oliveros, Esther. Université Paul Sabatier; FranciaFil: Lorente, Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; ArgentinaAmerican Chemical Society2010-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/253692Denofrio, Maria Paula; Thomas, Andrés Héctor; Braun, André M.; Oliveros, Esther; Lorente, Carolina; Comment on “Excited-State Intermolecular Proton Transfer of Lumazine”; American Chemical Society; Journal of Physical Chemistry C; 114; 33; 7-2010; 14307-143081932-7447CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://pubs.acs.org/doi/10.1021/jp103900jinfo:eu-repo/semantics/altIdentifier/doi/10.1021/jp103900jinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:44:45Zoai:ri.conicet.gov.ar:11336/253692instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 09:44:46.106CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Comment on “Excited-State Intermolecular Proton Transfer of Lumazine”
title Comment on “Excited-State Intermolecular Proton Transfer of Lumazine”
spellingShingle Comment on “Excited-State Intermolecular Proton Transfer of Lumazine”
Denofrio, Maria Paula
Lumazine
Photochemistry
title_short Comment on “Excited-State Intermolecular Proton Transfer of Lumazine”
title_full Comment on “Excited-State Intermolecular Proton Transfer of Lumazine”
title_fullStr Comment on “Excited-State Intermolecular Proton Transfer of Lumazine”
title_full_unstemmed Comment on “Excited-State Intermolecular Proton Transfer of Lumazine”
title_sort Comment on “Excited-State Intermolecular Proton Transfer of Lumazine”
dc.creator.none.fl_str_mv Denofrio, Maria Paula
Thomas, Andrés Héctor
Braun, André M.
Oliveros, Esther
Lorente, Carolina
author Denofrio, Maria Paula
author_facet Denofrio, Maria Paula
Thomas, Andrés Héctor
Braun, André M.
Oliveros, Esther
Lorente, Carolina
author_role author
author2 Thomas, Andrés Héctor
Braun, André M.
Oliveros, Esther
Lorente, Carolina
author2_role author
author
author
author
dc.subject.none.fl_str_mv Lumazine
Photochemistry
topic Lumazine
Photochemistry
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv A critical comment on excited-state intermolar proton transfer of lumazine was discussed. In their article, Hupper and co-researchers reported the emission properties of lumazine (Lum) using steady-state and time-resolved emission techniques. They also reported the absorption spectra at different pH and they evaluated the pKa value in water to be about 10.5. Hupper do not mention how the pH was measured. The critic´s results on emission of Lum indicate that the fluorescence of Lum is quenched by hydroxide anions, and consequently, a decrease of the fluorescence is observed at pH higher than 10.5. Hupper and co-researchers did not refer the tautomerism of Lum, which implies different atoms participating in proton transfer they also postulate. Indeed, they discuss the inter-molecular proton transfer in the excited state of Lum, but they analyzed the tautomeric forms of Lum neither in the ground state nor in the excited state.
Fil: Denofrio, Maria Paula. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina
Fil: Thomas, Andrés Héctor. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina
Fil: Braun, André M.. Karlsruhe Institute of Technology; Alemania
Fil: Oliveros, Esther. Université Paul Sabatier; Francia
Fil: Lorente, Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina
description A critical comment on excited-state intermolar proton transfer of lumazine was discussed. In their article, Hupper and co-researchers reported the emission properties of lumazine (Lum) using steady-state and time-resolved emission techniques. They also reported the absorption spectra at different pH and they evaluated the pKa value in water to be about 10.5. Hupper do not mention how the pH was measured. The critic´s results on emission of Lum indicate that the fluorescence of Lum is quenched by hydroxide anions, and consequently, a decrease of the fluorescence is observed at pH higher than 10.5. Hupper and co-researchers did not refer the tautomerism of Lum, which implies different atoms participating in proton transfer they also postulate. Indeed, they discuss the inter-molecular proton transfer in the excited state of Lum, but they analyzed the tautomeric forms of Lum neither in the ground state nor in the excited state.
publishDate 2010
dc.date.none.fl_str_mv 2010-07
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/253692
Denofrio, Maria Paula; Thomas, Andrés Héctor; Braun, André M.; Oliveros, Esther; Lorente, Carolina; Comment on “Excited-State Intermolecular Proton Transfer of Lumazine”; American Chemical Society; Journal of Physical Chemistry C; 114; 33; 7-2010; 14307-14308
1932-7447
CONICET Digital
CONICET
url http://hdl.handle.net/11336/253692
identifier_str_mv Denofrio, Maria Paula; Thomas, Andrés Héctor; Braun, André M.; Oliveros, Esther; Lorente, Carolina; Comment on “Excited-State Intermolecular Proton Transfer of Lumazine”; American Chemical Society; Journal of Physical Chemistry C; 114; 33; 7-2010; 14307-14308
1932-7447
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://pubs.acs.org/doi/10.1021/jp103900j
info:eu-repo/semantics/altIdentifier/doi/10.1021/jp103900j
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Chemical Society
publisher.none.fl_str_mv American Chemical Society
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.13397

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