Electronic, optical, and semiconducting properties of a series of propeller-shaped oligo(styryl)benzenes have been systematically investigated to monitor the effect of the number of styryl branches (three, four, and six) around a central benzene core. In order to clarify the relationships between their structures and properties, Density Functional Theory calculations were carried out at several levels of theory considering solvents with different polarity. Absorption and vibrational Raman spectroscopies showed that cruciform, four-branched derivatives present the most effective π-conjugation in agreement with the lowest calculated bond length alternation and bandgap. Deviations from the mirror image symmetry between absorption and fluorescence spectra were related to changes in the molecular conformation upon electronic excitation. Furthermore, in order to investigate the semiconducting behavior of oligo(styryl)benzenes, molecular structure changes and different electronic properties related to ionization processes were calculated and analyzed. Hole and electron reorganization energies were also computed to provide a first approximation on the n- or p-type character of these compounds. In some cases, electron reorganization energies comparable to common n-type semiconductors were found.
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14 February 2019
Research Article|
February 12 2019
Photophysical features and semiconducting properties of propeller-shaped oligo(styryl)benzenes
Mónica Moral;
Mónica Moral
1
Renewable Energy Research Institute, University of Castilla-La Mancha
, Paseo de la Investigación 1, 02071 Albacete, Spain
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Rocío Domínguez;
Rocío Domínguez
2
Department of Inorganic, Organic Chemistry and Biochemistry, Faculty of Pharmacy, University of Castilla-La Mancha
, 02071 Albacete, Spain
3
Regional Center for Biomedical Research (CRIB)
, C/ Almansa s/n, 02071 Albacete, Spain
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M. Paz Fernández-Liencres;
M. Paz Fernández-Liencres
4
Department of Physical and Analytical Chemistry, Faculty of Experimental Sciences, Universidad de Jaén
, 23071 Jaén, Spain
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Andrés Garzón-Ruiz
;
Andrés Garzón-Ruiz
5
Department of Physical Chemistry, Faculty of Pharmacy, University of Castilla-La Mancha
, 02071 Albacete, Spain
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Joaquín C. García-Martínez;
Joaquín C. García-Martínez
a)
2
Department of Inorganic, Organic Chemistry and Biochemistry, Faculty of Pharmacy, University of Castilla-La Mancha
, 02071 Albacete, Spain
3
Regional Center for Biomedical Research (CRIB)
, C/ Almansa s/n, 02071 Albacete, Spain
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Amparo Navarro
Amparo Navarro
a)
4
Department of Physical and Analytical Chemistry, Faculty of Experimental Sciences, Universidad de Jaén
, 23071 Jaén, Spain
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a)
Electronic addresses: anavarro@ujaen.es and JoaquinC.Garcia@uclm.es
J. Chem. Phys. 150, 064309 (2019)
Article history
Received:
November 05 2018
Accepted:
January 23 2019
Citation
Mónica Moral, Rocío Domínguez, M. Paz Fernández-Liencres, Andrés Garzón-Ruiz, Joaquín C. García-Martínez, Amparo Navarro; Photophysical features and semiconducting properties of propeller-shaped oligo(styryl)benzenes. J. Chem. Phys. 14 February 2019; 150 (6): 064309. https://doi.org/10.1063/1.5079935
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