Artículo

Szalai, A.; Giordano, L.; Sánchez, V.M.; Atvars, T.D.Z.; Faleiros, M.; Jares-Erijman, E.; Aramendía, P.F. "Temperature dependent spectroscopic and excited state dynamics of 3-hydroxychromones with electron donor and acceptor substituents" (2017) Methods and Applications in Fluorescence. 5(2)
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Abstract:

We have studied the photophysical and photochemical behavior of three compounds derived from 3-hydroxychromone (3-HC), capable of undergoing excited state proton transfer (ESIPT). The compounds have two substituents, located in positions 2 and 7, one on each ring of the 3-HC heterocycle. The substituent pattern shows different electron donating and acceptor features. The compounds were studied by absorption and emission spectroscopy, steady state anisotropy, and time resolved emission spectroscopy (TRES) as a function of temperature. Results were interpreted using time dependent density functional theory calculations. Compared to reference compounds of 3-HC substituted only in the 2 position, the compounds show similar absorption and emission spectra, shifted 20-30 nm to higher wavelengths due to extended conjugation. TRES shows the existence of ESIPT in the thermodynamic equilibrium regime. This process is endothermic in all three compounds. The different behavior compared to monosubstituted 3-HC is attributed to the extended conjugation and to the electron donor acceptor character of the substituents, which has a more pronounced effect when the electron acceptor is located in position 2. © 2017 IOP Publishing Ltd.

Registro:

Documento: Artículo
Título:Temperature dependent spectroscopic and excited state dynamics of 3-hydroxychromones with electron donor and acceptor substituents
Autor:Szalai, A.; Giordano, L.; Sánchez, V.M.; Atvars, T.D.Z.; Faleiros, M.; Jares-Erijman, E.; Aramendía, P.F.
Filiación:Centro de Investigaciones en Bionanociencias 'Elizabeth Jares-Erijman' CIBION, CONICET, Godoy Cruz 2390, Ciudad de Buenos Aires, 1425, Argentina
Departamento de Química Inorgánica, Analítica y Química Física, FCEN, UBA, Ciudad Universitaria, Pabellón 2, Ciudad de Buenos Aires, 1428, Argentina
Departamento de Química Orgánica, FCEN, UBA, Ciudad Universitaria, Pabellón 2, Ciudad de Buenos Aires, 1428, Argentina
Centro de Simulación Computacional para Aplicaciones Tecnológicas, CSC-CONICET, Godoy Cruz 2390, Ciudad de Buenos Aires, 1425, Argentina
Chemistry Institute, University of Campinas, PO Box 6154, Campinas, SP, Brazil
CIHIDECAR-CONICET, Ciudad Universitaria, Pabellón 2, Ciudad de Buenos Aires, 1428, Argentina
Palabras clave:Anisotropy; ESIPT; Fluorescence; Ratiometric probe; TDDFT; Time resolved emission spectroscopy
Año:2017
Volumen:5
Número:2
DOI: http://dx.doi.org/10.1088/2050-6120/aa6ec0
Título revista:Methods and Applications in Fluorescence
Título revista abreviado:Methods Appl. Fluoresc.
ISSN:20506120
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_20506120_v5_n2_p_Szalai

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Citas:

---------- APA ----------
Szalai, A., Giordano, L., Sánchez, V.M., Atvars, T.D.Z., Faleiros, M., Jares-Erijman, E. & Aramendía, P.F. (2017) . Temperature dependent spectroscopic and excited state dynamics of 3-hydroxychromones with electron donor and acceptor substituents. Methods and Applications in Fluorescence, 5(2).
http://dx.doi.org/10.1088/2050-6120/aa6ec0
---------- CHICAGO ----------
Szalai, A., Giordano, L., Sánchez, V.M., Atvars, T.D.Z., Faleiros, M., Jares-Erijman, E., et al. "Temperature dependent spectroscopic and excited state dynamics of 3-hydroxychromones with electron donor and acceptor substituents" . Methods and Applications in Fluorescence 5, no. 2 (2017).
http://dx.doi.org/10.1088/2050-6120/aa6ec0
---------- MLA ----------
Szalai, A., Giordano, L., Sánchez, V.M., Atvars, T.D.Z., Faleiros, M., Jares-Erijman, E., et al. "Temperature dependent spectroscopic and excited state dynamics of 3-hydroxychromones with electron donor and acceptor substituents" . Methods and Applications in Fluorescence, vol. 5, no. 2, 2017.
http://dx.doi.org/10.1088/2050-6120/aa6ec0
---------- VANCOUVER ----------
Szalai, A., Giordano, L., Sánchez, V.M., Atvars, T.D.Z., Faleiros, M., Jares-Erijman, E., et al. Temperature dependent spectroscopic and excited state dynamics of 3-hydroxychromones with electron donor and acceptor substituents. Methods Appl. Fluoresc. 2017;5(2).
http://dx.doi.org/10.1088/2050-6120/aa6ec0