Solvent effects on the photophysical properties of Bu4N[(4,40-bpy) Re(CO)3(bpy-5,50-diCOO)] complex. A combined experimental and computational study

Autores
Martinez Saavedra, Hector H.; Ragone, Fabricio; Franca, Carlos A.; Ruiz, Gustavo T.; David Gara, Pedro Maximiliano; Wolcan, Ezequiel
Año de publicación
2016
Idioma
inglés
Tipo de recurso
artículo
Estado
versión aceptada
Descripción
The photophysical properties of the complex Bu4N[(4,40-bpy)Re(CO)3(bpy-5,50-diCOO)] were studied inprotic and aprotic media with the aid of steady-state and time-resolved techniques and TD-DFT calculations.The absorption spectrum as well as the steady state and time resolved luminescence of the Re(I)complex display a marked solvent effect. The highest and lowest energy absorption bands experience abathochromic shift as the polarity of the solvent decreases. In addition, the lowest energy band broadens.Two luminescence bands were observed around 430 and 600 nm in protic organic solvents like alcohols.The high energy emission is observed solely in aqueous solutions, while in aprotic solvents only the lowenergy luminescence is detected. TD-DFT calculations allowed us to identify the main electronic transitionsin the low energy region as 1MLLCTReðCOÞ3/4;40 bpy and 1MLLCTReðCOÞ3/bpy 5;50 diCOO. The simulatedabsorption spectra of the Re(I) complex in H2O, protic (EtOH, MeOH) and aprotic (CHCl3, CH2Cl2,CH3CN) organic solvents follow the experimental absorption spectra with reasonable accuracy both inposition and relative intensities. The magnitude of the calculated dipole moment (m) increases with thedielectric constant of the solvent (εr). Besides, the energy of 1MLLCTReðCOÞ3/4;40 bpy also increases with εr.However, the energy of the 1MLLCTReðCOÞ3/bpy 5;50 diCOO transition is rather insensitive to εr. Thisdisparity is attributed to the fact that the 1MLLCTReðCOÞ3/4;40 bpy transition is nearly parallel to theorientation of m while the 1MLLCTReðCOÞ3/bpy 5;50 diCOO transition is almost perpendicular to it. UnrestrictedTD-DFT calculations were successfully applied to the triplet species. It is observed that in thetriplet state the ReeN distances are shortened while ReeC distances are elongated relative to the groundstate. The calculated emission energy by TD-DFT and/or D(SCF) methods was compared to the experimentalemission maximum in chloroform. All the experimental results as well as the theoretical calculationsindicate that solvent effects on the steady state and time resolved luminescence of the Re(I)complex can be accounted by the coexistence of 3MLLCTReðCOÞ3/4;40 bpy, 3MLLCTReðCOÞ3/bpy 5;50 diCOOand 1IL excited states Remove selected
Materia
Ciencias Químicas
Re(I) tricarbonyl complex
Solvent effects
TD-DFT
Photophysics
Triplet energy calculation
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-nd/4.0/
Repositorio
CIC Digital (CICBA)
Institución
Comisión de Investigaciones Científicas de la Provincia de Buenos Aires
OAI Identificador
oai:digital.cic.gba.gob.ar:11746/2244

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oai_identifier_str oai:digital.cic.gba.gob.ar:11746/2244
network_acronym_str CICBA
repository_id_str 9441
network_name_str CIC Digital (CICBA)
spelling Solvent effects on the photophysical properties of Bu4N[(4,40-bpy) Re(CO)3(bpy-5,50-diCOO)] complex. A combined experimental and computational studyMartinez Saavedra, Hector H.Ragone, FabricioFranca, Carlos A.Ruiz, Gustavo T.David Gara, Pedro MaximilianoWolcan, EzequielCiencias QuímicasRe(I) tricarbonyl complexSolvent effectsTD-DFTPhotophysicsTriplet energy calculationThe photophysical properties of the complex Bu4N[(4,40-bpy)Re(CO)3(bpy-5,50-diCOO)] were studied inprotic and aprotic media with the aid of steady-state and time-resolved techniques and TD-DFT calculations.The absorption spectrum as well as the steady state and time resolved luminescence of the Re(I)complex display a marked solvent effect. The highest and lowest energy absorption bands experience abathochromic shift as the polarity of the solvent decreases. In addition, the lowest energy band broadens.Two luminescence bands were observed around 430 and 600 nm in protic organic solvents like alcohols.The high energy emission is observed solely in aqueous solutions, while in aprotic solvents only the lowenergy luminescence is detected. TD-DFT calculations allowed us to identify the main electronic transitionsin the low energy region as 1MLLCTReðCOÞ3/4;40 bpy and 1MLLCTReðCOÞ3/bpy 5;50 diCOO. The simulatedabsorption spectra of the Re(I) complex in H2O, protic (EtOH, MeOH) and aprotic (CHCl3, CH2Cl2,CH3CN) organic solvents follow the experimental absorption spectra with reasonable accuracy both inposition and relative intensities. The magnitude of the calculated dipole moment (m) increases with thedielectric constant of the solvent (εr). Besides, the energy of 1MLLCTReðCOÞ3/4;40 bpy also increases with εr.However, the energy of the 1MLLCTReðCOÞ3/bpy 5;50 diCOO transition is rather insensitive to εr. Thisdisparity is attributed to the fact that the 1MLLCTReðCOÞ3/4;40 bpy transition is nearly parallel to theorientation of m while the 1MLLCTReðCOÞ3/bpy 5;50 diCOO transition is almost perpendicular to it. UnrestrictedTD-DFT calculations were successfully applied to the triplet species. It is observed that in thetriplet state the ReeN distances are shortened while ReeC distances are elongated relative to the groundstate. The calculated emission energy by TD-DFT and/or D(SCF) methods was compared to the experimentalemission maximum in chloroform. All the experimental results as well as the theoretical calculationsindicate that solvent effects on the steady state and time resolved luminescence of the Re(I)complex can be accounted by the coexistence of 3MLLCTReðCOÞ3/4;40 bpy, 3MLLCTReðCOÞ3/bpy 5;50 diCOOand 1IL excited states Remove selected2016-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttps://digital.cic.gba.gob.ar/handle/11746/2244enginfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/4.0/reponame:CIC Digital (CICBA)instname:Comisión de Investigaciones Científicas de la Provincia de Buenos Airesinstacron:CICBA2025-09-29T13:40:22Zoai:digital.cic.gba.gob.ar:11746/2244Institucionalhttp://digital.cic.gba.gob.arOrganismo científico-tecnológicoNo correspondehttp://digital.cic.gba.gob.ar/oai/snrdmarisa.degiusti@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:94412025-09-29 13:40:22.912CIC Digital (CICBA) - Comisión de Investigaciones Científicas de la Provincia de Buenos Airesfalse
dc.title.none.fl_str_mv Solvent effects on the photophysical properties of Bu4N[(4,40-bpy) Re(CO)3(bpy-5,50-diCOO)] complex. A combined experimental and computational study
title Solvent effects on the photophysical properties of Bu4N[(4,40-bpy) Re(CO)3(bpy-5,50-diCOO)] complex. A combined experimental and computational study
spellingShingle Solvent effects on the photophysical properties of Bu4N[(4,40-bpy) Re(CO)3(bpy-5,50-diCOO)] complex. A combined experimental and computational study
Martinez Saavedra, Hector H.
Ciencias Químicas
Re(I) tricarbonyl complex
Solvent effects
TD-DFT
Photophysics
Triplet energy calculation
title_short Solvent effects on the photophysical properties of Bu4N[(4,40-bpy) Re(CO)3(bpy-5,50-diCOO)] complex. A combined experimental and computational study
title_full Solvent effects on the photophysical properties of Bu4N[(4,40-bpy) Re(CO)3(bpy-5,50-diCOO)] complex. A combined experimental and computational study
title_fullStr Solvent effects on the photophysical properties of Bu4N[(4,40-bpy) Re(CO)3(bpy-5,50-diCOO)] complex. A combined experimental and computational study
title_full_unstemmed Solvent effects on the photophysical properties of Bu4N[(4,40-bpy) Re(CO)3(bpy-5,50-diCOO)] complex. A combined experimental and computational study
title_sort Solvent effects on the photophysical properties of Bu4N[(4,40-bpy) Re(CO)3(bpy-5,50-diCOO)] complex. A combined experimental and computational study
dc.creator.none.fl_str_mv Martinez Saavedra, Hector H.
Ragone, Fabricio
Franca, Carlos A.
Ruiz, Gustavo T.
David Gara, Pedro Maximiliano
Wolcan, Ezequiel
author Martinez Saavedra, Hector H.
author_facet Martinez Saavedra, Hector H.
Ragone, Fabricio
Franca, Carlos A.
Ruiz, Gustavo T.
David Gara, Pedro Maximiliano
Wolcan, Ezequiel
author_role author
author2 Ragone, Fabricio
Franca, Carlos A.
Ruiz, Gustavo T.
David Gara, Pedro Maximiliano
Wolcan, Ezequiel
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Ciencias Químicas
Re(I) tricarbonyl complex
Solvent effects
TD-DFT
Photophysics
Triplet energy calculation
topic Ciencias Químicas
Re(I) tricarbonyl complex
Solvent effects
TD-DFT
Photophysics
Triplet energy calculation
dc.description.none.fl_txt_mv The photophysical properties of the complex Bu4N[(4,40-bpy)Re(CO)3(bpy-5,50-diCOO)] were studied inprotic and aprotic media with the aid of steady-state and time-resolved techniques and TD-DFT calculations.The absorption spectrum as well as the steady state and time resolved luminescence of the Re(I)complex display a marked solvent effect. The highest and lowest energy absorption bands experience abathochromic shift as the polarity of the solvent decreases. In addition, the lowest energy band broadens.Two luminescence bands were observed around 430 and 600 nm in protic organic solvents like alcohols.The high energy emission is observed solely in aqueous solutions, while in aprotic solvents only the lowenergy luminescence is detected. TD-DFT calculations allowed us to identify the main electronic transitionsin the low energy region as 1MLLCTReðCOÞ3/4;40 bpy and 1MLLCTReðCOÞ3/bpy 5;50 diCOO. The simulatedabsorption spectra of the Re(I) complex in H2O, protic (EtOH, MeOH) and aprotic (CHCl3, CH2Cl2,CH3CN) organic solvents follow the experimental absorption spectra with reasonable accuracy both inposition and relative intensities. The magnitude of the calculated dipole moment (m) increases with thedielectric constant of the solvent (εr). Besides, the energy of 1MLLCTReðCOÞ3/4;40 bpy also increases with εr.However, the energy of the 1MLLCTReðCOÞ3/bpy 5;50 diCOO transition is rather insensitive to εr. Thisdisparity is attributed to the fact that the 1MLLCTReðCOÞ3/4;40 bpy transition is nearly parallel to theorientation of m while the 1MLLCTReðCOÞ3/bpy 5;50 diCOO transition is almost perpendicular to it. UnrestrictedTD-DFT calculations were successfully applied to the triplet species. It is observed that in thetriplet state the ReeN distances are shortened while ReeC distances are elongated relative to the groundstate. The calculated emission energy by TD-DFT and/or D(SCF) methods was compared to the experimentalemission maximum in chloroform. All the experimental results as well as the theoretical calculationsindicate that solvent effects on the steady state and time resolved luminescence of the Re(I)complex can be accounted by the coexistence of 3MLLCTReðCOÞ3/4;40 bpy, 3MLLCTReðCOÞ3/bpy 5;50 diCOOand 1IL excited states Remove selected
description The photophysical properties of the complex Bu4N[(4,40-bpy)Re(CO)3(bpy-5,50-diCOO)] were studied inprotic and aprotic media with the aid of steady-state and time-resolved techniques and TD-DFT calculations.The absorption spectrum as well as the steady state and time resolved luminescence of the Re(I)complex display a marked solvent effect. The highest and lowest energy absorption bands experience abathochromic shift as the polarity of the solvent decreases. In addition, the lowest energy band broadens.Two luminescence bands were observed around 430 and 600 nm in protic organic solvents like alcohols.The high energy emission is observed solely in aqueous solutions, while in aprotic solvents only the lowenergy luminescence is detected. TD-DFT calculations allowed us to identify the main electronic transitionsin the low energy region as 1MLLCTReðCOÞ3/4;40 bpy and 1MLLCTReðCOÞ3/bpy 5;50 diCOO. The simulatedabsorption spectra of the Re(I) complex in H2O, protic (EtOH, MeOH) and aprotic (CHCl3, CH2Cl2,CH3CN) organic solvents follow the experimental absorption spectra with reasonable accuracy both inposition and relative intensities. The magnitude of the calculated dipole moment (m) increases with thedielectric constant of the solvent (εr). Besides, the energy of 1MLLCTReðCOÞ3/4;40 bpy also increases with εr.However, the energy of the 1MLLCTReðCOÞ3/bpy 5;50 diCOO transition is rather insensitive to εr. Thisdisparity is attributed to the fact that the 1MLLCTReðCOÞ3/4;40 bpy transition is nearly parallel to theorientation of m while the 1MLLCTReðCOÞ3/bpy 5;50 diCOO transition is almost perpendicular to it. UnrestrictedTD-DFT calculations were successfully applied to the triplet species. It is observed that in thetriplet state the ReeN distances are shortened while ReeC distances are elongated relative to the groundstate. The calculated emission energy by TD-DFT and/or D(SCF) methods was compared to the experimentalemission maximum in chloroform. All the experimental results as well as the theoretical calculationsindicate that solvent effects on the steady state and time resolved luminescence of the Re(I)complex can be accounted by the coexistence of 3MLLCTReðCOÞ3/4;40 bpy, 3MLLCTReðCOÞ3/bpy 5;50 diCOOand 1IL excited states Remove selected
publishDate 2016
dc.date.none.fl_str_mv 2016-05
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://digital.cic.gba.gob.ar/handle/11746/2244
url https://digital.cic.gba.gob.ar/handle/11746/2244
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:CIC Digital (CICBA)
instname:Comisión de Investigaciones Científicas de la Provincia de Buenos Aires
instacron:CICBA
reponame_str CIC Digital (CICBA)
collection CIC Digital (CICBA)
instname_str Comisión de Investigaciones Científicas de la Provincia de Buenos Aires
instacron_str CICBA
institution CICBA
repository.name.fl_str_mv CIC Digital (CICBA) - Comisión de Investigaciones Científicas de la Provincia de Buenos Aires
repository.mail.fl_str_mv marisa.degiusti@sedici.unlp.edu.ar
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