Artículo
Rhodamine 6G and 800 intermolecular heteroaggregates embedded in PMMA for near-infrared wavelength shifting
Autor/es | Castillo Seoane, Javier
González García, Lola Obrero Pérez, José M. Aparicio Rebollo, Francisco Javier Borrás Martos, Ana Isabel Rodríguez González-Elipe, Agustín Barranco Quero, Ángel Sánchez Valencia, Juan Ramón |
Departamento | Universidad de Sevilla. Departamento de Física Aplicada I Universidad de Sevilla. Departamento de Química Inorgánica |
Fecha de publicación | 2022-03 |
Fecha de depósito | 2022-09-01 |
Publicado en |
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Resumen | The opto-electronic properties of small-molecules and functional dyes usually differ when incorporated
into solid matrices with respect to their isolated form due to an aggregation phenomenon that alters
their optical ... The opto-electronic properties of small-molecules and functional dyes usually differ when incorporated into solid matrices with respect to their isolated form due to an aggregation phenomenon that alters their optical and fluorescent properties. These spectroscopic modifications are studied in the framework of the exciton theory of aggregates, which has been extensively applied in the literature for the study of molecular aggregates of the same type of molecules (homoaggregation). Despite the demonstrated potential of the control of the heteroaggregation process (aggregation of different types of molecules), most of the reported works are devoted to intramolecular aggregates, complex molecules formed by several chromophores attached by organic linkers. The intramolecular aggregates are specifically designed to hold a certain molecular structure that, on the basis of the exciton theory, modifies their optical and fluorescent properties with respect to the isolated chromophores that form the molecule. The present article describes in detail the incorporation of Rhodamine 6G (Rh6G) and 800 (Rh800) into polymeric matrices of poly-(methyl methacrylate), PMMA. The simultaneous incorporation of both dyes results in an enhanced fluorescent emission in the near-infrared (NIR), originating from the formation of ground-state Rh6G–Rh800 intermolecular heteroaggregates. The systematic control of the concentration of both rhodamines provides a model system for the elucidation of the heteroaggregate formation. The efficient energy transfer between Rh6G and Rh800 molecules can be used as wavelength shifters to convert effectively the light from visible to NIR, a very convenient wavelength range for many practical applications which make use of inexpensive commercial detectors and systems. |
Identificador del proyecto | PID2019-110430GB-C21
PID2019- 109603RA-I00 US-1263142 US-1381057 AT17-6079 P18- RT-3480 VI PPIT-US EU H2020 851929 (ERC Starting Grant 3DScavengers) |
Cita | Castillo Seoane, J., González García, L., Obrero Pérez, J.M., Aparicio Rebollo, F.J., Borrás Martos, A.I., Rodríguez González-Elipe, A.,...,Sánchez Valencia, J.R. (2022). Rhodamine 6G and 800 intermolecular heteroaggregates embedded in PMMA for near-infrared wavelength shifting. Journal of Materials Chemistry C, 10 (18), 7119-7131. |
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