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Artículo

Clean singlet oxygen production by a ReI complex embedded in a flexible self-standing polymeric silsesquioxane film

Spada, Ramiro MartínIcon ; Cepeda Plaza, Marjorie; Gómez, María L.; Günther, Germán; Jaque, Pablo; Pizarro, Nancy; Palacios, Rodrigo EmilianoIcon ; Vega, Andrés
Fecha de publicación: 05/2015
Editorial: American Chemical Society
Revista: Journal of Physical Chemistry C
ISSN: 1932-7447
e-ISSN: 1932-7455
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Otras Ciencias Químicas

Resumen

Rhenium complexes are versatile molecular building blocks whose tunable photophysical properties are useful in diverse opto-related applications. Herein we report the synthesis and characterization of a novel ReI tricarbonyldiimine complex, [(phen)Re(CO)3Br] (phen: 1,10-phenanthroline), which was found to be an efficient singlet oxygen [O2(1Î"g)] photosensitizer in homogeneous solution [ΦO2(1Î"g) = 0.55 (dichloromethane) and 0.16 (dimethylformamide)]. The photophysical properties of [(phen)Re(CO)3Br] were thoroughly characterized in solution and modeled by means of density functional theory (DFT) and time-dependent (TD)-DFT quantum mechanical calculations. The Re complex was incorporated into a flexible polymeric silsesquioxane (SSO) film, which has excellent dopant compatibility, chemical resistance, and mechanical properties. When [(phen)Re(CO)3Br] is embedded in the SSO film, it is found to retain most of the photophysical characteristics observed for the complex in solution. In particular, the [(phen)Re(CO)3Br]-doped SSO films were able to photosensitize O2(1Î"g) when illuminated with blue light (∼405 nm). The O2(1Î"g) sensitization by films in acetonitrile was followed by the photooxidation of the well-known O2(1Î"g) chemical trap 9,10-dimethylanthracene (DMA) and confirmed by the direct observation of the O2(1Î"g) luminescence spectrum (centered at 1270 nm) and the measurement of its kinetic profile. These results highlight the potential application of this type of polymeric material in the production of biological- or microbial-photoinactivating flexible surfaces or in the implementation of interfacial solid/liquid strategies for the photoinduced oxidation of organic compounds in solution.
Palabras clave: Re Complex , Singlet Oxygen , Silsesquioxane , Photooxidation
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/59484
URL: http://pubs.acs.org/doi/abs/10.1021/acs.jpcc.5b01990
DOI: http://dx.doi.org/10.1021/acs.jpcc.5b01990
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Articulos(CCT - CORDOBA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - CORDOBA
Citación
Spada, Ramiro Martín; Cepeda Plaza, Marjorie; Gómez, María L.; Günther, Germán; Jaque, Pablo; et al.; Clean singlet oxygen production by a ReI complex embedded in a flexible self-standing polymeric silsesquioxane film; American Chemical Society; Journal of Physical Chemistry C; 119; 18; 5-2015; 10148-10159
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