Photophysical properties of [(norharmane)Re(CO)3 (L)]+ complexes (L = bpy, phen or dppz): redox behavior of the excited states and their interaction with Calf Thymus DNA
The photochemical and photophysical properties of [(nHo)Re(CO)3(L)]+ complexes, where nHo = 9H-pyrido[3,4-b]indole and L = 2,2′ bipyridine (bpy), 1,10 phenantroline (phen) or dipyridil[3,2-a:2′3′-c]phenazine (dppz) were investigated by Laser Flash Photolysis (LFF) and Pulse Radiolysis (PR) technique...
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| Autores principales: | , , , , |
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| Formato: | Articulo Preprint |
| Lenguaje: | Inglés |
| Publicado: |
2018
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| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/104729 http://hdl.handle.net/11336/99512 |
| Aporte de: |
| id |
I19-R120-10915-104729 |
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| record_format |
dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Bioquímica Química 2,2′ bipyridine,1,10 phenantroline 9H-pyrido[3,4-b]indole Calf thymus DNA Flash photolysis Intercalation of Re complexes Phenazine Photochemical and photopysical properties Pulse radiolysis |
| spellingShingle |
Bioquímica Química 2,2′ bipyridine,1,10 phenantroline 9H-pyrido[3,4-b]indole Calf thymus DNA Flash photolysis Intercalation of Re complexes Phenazine Photochemical and photopysical properties Pulse radiolysis Maisuls, Iván Cabrerizo, Franco Martín Lappin, Alexander G. Ruiz, Gustavo Teodosio Ferraudi, Guillermo J. Photophysical properties of [(norharmane)Re(CO)3 (L)]+ complexes (L = bpy, phen or dppz): redox behavior of the excited states and their interaction with Calf Thymus DNA |
| topic_facet |
Bioquímica Química 2,2′ bipyridine,1,10 phenantroline 9H-pyrido[3,4-b]indole Calf thymus DNA Flash photolysis Intercalation of Re complexes Phenazine Photochemical and photopysical properties Pulse radiolysis |
| description |
The photochemical and photophysical properties of [(nHo)Re(CO)3(L)]+ complexes, where nHo = 9H-pyrido[3,4-b]indole and L = 2,2′ bipyridine (bpy), 1,10 phenantroline (phen) or dipyridil[3,2-a:2′3′-c]phenazine (dppz) were investigated by Laser Flash Photolysis (LFF) and Pulse Radiolysis (PR) techniques. While complexes with L = bpy or phen show absorption transients compatible with MLCTRe→L excited states, [(nHo)Re(CO)3(dppz)]+ showed an excited state assignable to a dppz-centered, 3ππ*dppz. In aqueous solutions, the last complex does not generate any absorption transient. However, when Calf thymus DNA was added, the same absorption spectrum was obtained. These results suggest that this complex can intercalate into DNA. The species generated in either reductive or oxidative conditions in LFF experiments were compared with those obtained in PR. Also, the quenching rate constants (kq) of the excited states with MV2+ were calculated. The intercalation of the [(nHo)Re(CO)3(dppz)]+ into DNA, increases kq ∼100 times. This result is rationalized in terms of the conditions created by the intercalation using the biopolymer as a well-organized matrix. |
| format |
Articulo Preprint |
| author |
Maisuls, Iván Cabrerizo, Franco Martín Lappin, Alexander G. Ruiz, Gustavo Teodosio Ferraudi, Guillermo J. |
| author_facet |
Maisuls, Iván Cabrerizo, Franco Martín Lappin, Alexander G. Ruiz, Gustavo Teodosio Ferraudi, Guillermo J. |
| author_sort |
Maisuls, Iván |
| title |
Photophysical properties of [(norharmane)Re(CO)3 (L)]+ complexes (L = bpy, phen or dppz): redox behavior of the excited states and their interaction with Calf Thymus DNA |
| title_short |
Photophysical properties of [(norharmane)Re(CO)3 (L)]+ complexes (L = bpy, phen or dppz): redox behavior of the excited states and their interaction with Calf Thymus DNA |
| title_full |
Photophysical properties of [(norharmane)Re(CO)3 (L)]+ complexes (L = bpy, phen or dppz): redox behavior of the excited states and their interaction with Calf Thymus DNA |
| title_fullStr |
Photophysical properties of [(norharmane)Re(CO)3 (L)]+ complexes (L = bpy, phen or dppz): redox behavior of the excited states and their interaction with Calf Thymus DNA |
| title_full_unstemmed |
Photophysical properties of [(norharmane)Re(CO)3 (L)]+ complexes (L = bpy, phen or dppz): redox behavior of the excited states and their interaction with Calf Thymus DNA |
| title_sort |
photophysical properties of [(norharmane)re(co)3 (l)]+ complexes (l = bpy, phen or dppz): redox behavior of the excited states and their interaction with calf thymus dna |
| publishDate |
2018 |
| url |
http://sedici.unlp.edu.ar/handle/10915/104729 http://hdl.handle.net/11336/99512 |
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Repositorios |
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