Abstract
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•Synthesis of new organic semi conducting polymers containing isosorbide pendant polar and chiral group.•Semi-conducting polymers.•Chromophore effect on optical and electrical properties.•Improved of PL quantum yield.
Tow isosorbide containing poly(phenylene vinylene-arylene vinylene)s have been synthesized via Wittig polycondensation: PPVIs-Carb (arylene: carbazole) and PPVIs-Naph (arylene: naphtalene). The macromolecular structures were characterized by NMR and FTIR spectroscopies. The polymers are soluble in common organic solvents and show good film-forming abilities thanks to the presence of the polar isosorbide side groups. These organic materials showed an amorphous behavior. A higher polarity of the surface was obtained for PPVIs-Naph. The both polymer films are photoluminescent and exhibit an optical gap of 2.3eV. The carbazole-based polymer emits in yellow-green while a green-yellow emission was obtained in the naphtalene conatainig polymer with higher fluorescence quantum efficiency. The HOMO/LUMO energy levels were determined by cyclic voltammetry and showed higher ionization potential and electronic affinity for PPVIs-Carb. The study of the ITO/polymer thin film/Al devices showed a space-charge limited current transport mechanism with charge carrier mobility in order of 10−8cm2V−1s−1.