Artículo
Tarzi, O.I.; Stéfano, L.D.; Argüello, J.E.; Oksdath-Mansilla, G.; Erra-Balsells, R. "Photochemical and thermal stability of some dihydroxyacetophenones used as UV-MALDI-MS matrices" (2013) Photochemistry and Photobiology. 89(6):1368-1374
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Abstract:
2,4-, 2,5-, 2,6- and 3,5-dihydroxyacetophenone (DHA) used as matrices in matrix-assisted ultraviolet laser desorption/ionization mass spectrometry (UV-MALDI-MS) were studied by steady-state and transient absorption spectroscopy, together with DFT calculations at the B3LYP level of theory. All compounds have low fluorescence quantum yields, possibly due to an efficient excited-state intramolecular proton transfer (ESIPT). Laser flash photolysis (LFP) results showed that, only for 2,4-DHA, a phototautomer could be detected at λ = 400 nm. Their photochemical stability in solution at different wavelengths and conditions was analyzed by UV-Vis and 1H nuclear magnetic resonance spectroscopy (1H-NMR), together with thin layer chromatography and ultraviolet laser desorption/ionization mass spectrometry (UV-LDI-MS). Only 3,5-DHA showed decomposition when irradiated, probably because phototautomerization is not possible. Thermal stability studies of these compounds in solid state were also conducted. © 2013 The American Society of Photobiology.
Registro:
| Documento: | Artículo |
| Título: | Photochemical and thermal stability of some dihydroxyacetophenones used as UV-MALDI-MS matrices |
| Autor: | Tarzi, O.I.; Stéfano, L.D.; Argüello, J.E.; Oksdath-Mansilla, G.; Erra-Balsells, R. |
| Filiación: | CIHIDECAR-CONICET, Departamento de Quimica Organica, Universidad de Buenos Aires, Ciudad Universitaria, Buenos Aires, Argentina INFIQC, Departamento de Quimica Organica, Universidad Nacional de Cordoba, Ciudad Universitaria, Cordoba, Argentina |
| Palabras clave: | 2,6-dihydroxyacetophenone; acetophenone derivative; chemistry; mass spectrometry; photochemistry; procedures; ultraviolet spectrophotometry; Acetophenones; Photochemistry; Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; Spectrophotometry, Ultraviolet |
| Año: | 2013 |
| Volumen: | 89 |
| Número: | 6 |
| Página de inicio: | 1368 |
| Página de fin: | 1374 |
| DOI: | http://dx.doi.org/10.1111/php.12130 |
| Título revista: | Photochemistry and Photobiology |
| Título revista abreviado: | Photochem. Photobiol. |
| ISSN: | 00318655 |
| CODEN: | PHCBA |
| CAS: | 2,6-dihydroxyacetophenone; Acetophenones |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00318655_v89_n6_p1368_Tarzi |
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Citas:
---------- APA ----------
Tarzi, O.I., Stéfano, L.D., Argüello, J.E., Oksdath-Mansilla, G. & Erra-Balsells, R. (2013) . Photochemical and thermal stability of some dihydroxyacetophenones used as UV-MALDI-MS matrices. Photochemistry and Photobiology, 89(6), 1368-1374.http://dx.doi.org/10.1111/php.12130
---------- CHICAGO ----------
Tarzi, O.I., Stéfano, L.D., Argüello, J.E., Oksdath-Mansilla, G., Erra-Balsells, R. "Photochemical and thermal stability of some dihydroxyacetophenones used as UV-MALDI-MS matrices" . Photochemistry and Photobiology 89, no. 6 (2013) : 1368-1374.http://dx.doi.org/10.1111/php.12130
---------- MLA ----------
Tarzi, O.I., Stéfano, L.D., Argüello, J.E., Oksdath-Mansilla, G., Erra-Balsells, R. "Photochemical and thermal stability of some dihydroxyacetophenones used as UV-MALDI-MS matrices" . Photochemistry and Photobiology, vol. 89, no. 6, 2013, pp. 1368-1374.http://dx.doi.org/10.1111/php.12130
---------- VANCOUVER ----------
Tarzi, O.I., Stéfano, L.D., Argüello, J.E., Oksdath-Mansilla, G., Erra-Balsells, R. Photochemical and thermal stability of some dihydroxyacetophenones used as UV-MALDI-MS matrices. Photochem. Photobiol. 2013;89(6):1368-1374.http://dx.doi.org/10.1111/php.12130
