The dependence of the linear optical properties of some soluble poly (terphenylenevinylene)s on the relative amount of cis- and trans-vinylene units has been investigated. A regular blue-shift of the absorption spectra in solution has been observed upon the addition of cis double bonds. Luminescence spectra show a vibronic structure which accounts for the reduced inter-ring torsion in the excited state with respect to the ground state. Moreover, an increased electron-phonon coupling for cis-rich polymers has been observed. (C) 2003 Elsevier Science B.V. All rights reserved.
Investigation of luminescence in new blue-emitting poly(2 ',5 '-dioctyloxy-4,4 ',4 ''-terphenylenevinylene)s
TOMMASI, Raffaele;BABUDRI, Francesco;FARINOLA, Gianluca Maria;
2003-01-01
Abstract
The dependence of the linear optical properties of some soluble poly (terphenylenevinylene)s on the relative amount of cis- and trans-vinylene units has been investigated. A regular blue-shift of the absorption spectra in solution has been observed upon the addition of cis double bonds. Luminescence spectra show a vibronic structure which accounts for the reduced inter-ring torsion in the excited state with respect to the ground state. Moreover, an increased electron-phonon coupling for cis-rich polymers has been observed. (C) 2003 Elsevier Science B.V. All rights reserved.File in questo prodotto:
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