The effect of cross-linking yield of PVK on the vibrational and emissive properties of new copolymer based on vinylcarbazole and phenylene-vinylene units

• The properties of PVK-PPV copolymer are modulated by the yield of PVK cross-linking.
• Optical and vibrational analysis are performed to investigate the effect of FeCl3 in the emissive properties of PVK-PPV copolymers.
• Time-resolved photoluminescence was used to predict the weight and the contribution of PVK and PPV segments.

The Phenylene-Vinylene (PV) unit’s was successfully incorporated in the Vinylarbazole (VC) skeleton using the oxidative way via an anhydrous FeCl3. Dramatic changes in the vibrational and emissive properties are founded by varying the FeCl3 amount in the synthesis way due to the cross-linking of PVK units. SEM analysis showing a modified morphology structures of three compounds. However the percentage of the oxidant account induces the modulation of copolymer properties particularly theirs emissive proprieties. A red shifting of the maximum of photoluminescence, a quenching of luminescence and a fast decay time was observed with increasing of the oxidation yields.

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