In this paper we describe in detail a general and efficient methodology, based on the perturbed matrix method and molecular dynamics simulations, to model UV-Vis absorption and emission spectra including vibrational and conformational effects. The basic approximation used is to consider all the chromophore atomic coordinates as semiclassical degrees of freedom, hence allowing the calculation of the complete spectral signal by using the electronic vertical transitions as obtained at each possible chromophore configuration, thus including the contributions of vibrations and conformational transitions into the spectrum. As shown for the model system utilized in this paper, solvated 1-phenyl-naphthalene, such an approximation can be rather accurate to reproduce the absorption and emission spectral line shape and properties when, as it often occurs, the vertical vibronic transition largely overlaps the other non-negligible vibronic transitions.
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21 September 2013
Research Article|
September 17 2013
Theoretical modeling of UV-Vis absorption and emission spectra in liquid state systems including vibrational and conformational effects: The vertical transition approximation
Maira D’Alessandro;
Maira D’Alessandro
1Dipartimento di Scienze Fisiche e Chimiche,
Università dell’Aquila
, Via Vetoio s.n.c., 67100 L’Aquila, Italy
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Massimiliano Aschi;
Massimiliano Aschi
a)
1Dipartimento di Scienze Fisiche e Chimiche,
Università dell’Aquila
, Via Vetoio s.n.c., 67100 L’Aquila, Italy
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Claudia Mazzuca;
Claudia Mazzuca
2Dipartimento di Scienze e Tecnologie Chimiche,
Università di Roma ‘Tor Vergata,’
Via della Ricerca Scientifica 1, 00133 Rome, Italy
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Antonio Palleschi;
Antonio Palleschi
2Dipartimento di Scienze e Tecnologie Chimiche,
Università di Roma ‘Tor Vergata,’
Via della Ricerca Scientifica 1, 00133 Rome, Italy
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Andrea Amadei
Andrea Amadei
a)
2Dipartimento di Scienze e Tecnologie Chimiche,
Università di Roma ‘Tor Vergata,’
Via della Ricerca Scientifica 1, 00133 Rome, Italy
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a)
Authors to whom correspondence should be addressed. Electronic addresses: massimiliano.aschi@univaq.it and andrea.amadei@uniroma2.it.
J. Chem. Phys. 139, 114102 (2013)
Article history
Received:
July 25 2013
Accepted:
August 28 2013
Citation
Maira D’Alessandro, Massimiliano Aschi, Claudia Mazzuca, Antonio Palleschi, Andrea Amadei; Theoretical modeling of UV-Vis absorption and emission spectra in liquid state systems including vibrational and conformational effects: The vertical transition approximation. J. Chem. Phys. 21 September 2013; 139 (11): 114102. https://doi.org/10.1063/1.4821003
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