The Effect of Star-Shaped Oligothiophenes with a Carbazole Core on Their Structural and Optical Properties.

Autor: Bakirov, A. V., Solodukhin, A. N., Luponosov, Yu. N., Svidchenko, E. A., Obrezkova, M. A., Peregudova, S. M., Shcherbina, M. A., Ponomarenko, S. A., Chvalun, S. N.
Zdroj: Nanotechnologies in Russia; Jul2017, Vol. 12 Issue 7/8, p385-394, 10p
Abstrakt: A comparative analysis of the structure and properties of donor-acceptor star-shaped compounds based on oligothiophene with electron-withdrawing dicyanovinyl groups and a different electron-donating branching center--planar 9-phenyl-9H-carbazole and propeller-shaped triphenylamine--has been carried out. It is shown that the absorption maxima in the spectra of 9-phenyl-9H-carbazole derivatives shift to shorter wavelengths, the HOMO energy decreases, and the LUMO energy increases. Moreover, in contrast to propeller-shaped triphenylamine-based compounds, which do not form ordered states, the T-shaped branched molecules based on carbazole form highly ordered crystal structures with different symmetry. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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