1. Optoelectronic characteristics of as-deposited, annealed and I2 – Treated thin films of newly synthesized organic dye based on pyrrolo[2,3-b]pyrrole
- Author
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E. Kh. Shokr, H. Abdel-Ghany, Mahmoud Abd El Aleem Ali Ali El-Remaily, and Moumen S. Kamel
- Subjects
Materials science ,Optical properties ,Thin films ,Thermal evaporation ,Azo coupling ,Conjugated system ,Pyrrolo[2,3-b]pyrrole ,chemistry.chemical_compound ,Chemistry ,Adsorption ,Aniline ,chemistry ,Materials Chemistry ,Environmental Chemistry ,Physical and Theoretical Chemistry ,Absorption (chemistry) ,Fourier transform infrared spectroscopy ,Thin film ,QD1-999 ,Iodine adsorption ,Nuclear chemistry ,Pyrrole ,Microwave irradiation - Abstract
Novel heterocyclic dyes were synthesized by attaching different electron-rich aromatics to the pyrrolo[2,3-b]pyrrole system by microwave irradiation system provided with condensation unit. The final push-pull conjugated dyes were yielded by azo coupling of PPY with aniline, 1-naphthylamine and N,N-dimethylaniline. Thin films of compound 3 have been chosen and prepared using thermal evaporation technique and investigated by FTIR and UV – VIS – NIR spectroscopy. Annealing out of PPY films at relatively low temperature ( ≤ 100 °C) for 3–6 min has been proved to notably reduce the energy gap and enhance both absorption and refractive indices. They manifested a fast response and high sensitivity toward iodine vapor with a low recovery time indicating a reversibility of iodine adsorption process.
- Published
- 2021