Semiempirical calculations of the collective optical excitations in substituted oligodiacetylenes

In this paper, we present the results of a theoretical study of the electronic and optical excitations of isolated carbazolyl-substituted oligodiacetylenes using the collective electronic oscillator (CEO) method. Within this technique the excitations are directly connected to the corresponding one-e...

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Bibliographic Details
Published in:Applied surface science 2004-03, Vol.226 (1-3), p.99-107
Main Authors: Ottonelli, M., Musso, G.F., Dellepiane, G.
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science
rheology
Electronic excitation
Exact sciences and technology
Oligodiacetylenes
Physics
Time dependent Hartree–Fock
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Summary:In this paper, we present the results of a theoretical study of the electronic and optical excitations of isolated carbazolyl-substituted oligodiacetylenes using the collective electronic oscillator (CEO) method. Within this technique the excitations are directly connected to the corresponding one-electron transition density matrices, obtained as eigenmodes of the time dependent Hartree–Fock (TDHF) Liouville operator, which represent motions of electron/hole pairs. The two-dimensional plot of the transition density matrix (CEO mode) establishes the physical connection between the electronic spectra and the electronic rearrangement due to the photon absorption. Consequently this representation allows for an intuitive interpretation of the optical spectra in terms of the chemical structure, and gives a useful tool for the design of molecules showing the required physical properties.
ISSN:0169-4332
1873-5584
DOI:10.1016/j.apsusc.2003.11.028