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Polymers
Volume 17
Issue 19
10.3390/polym17192656
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Article

Obtaining Poly(3-Hexylthiophene) (P3HT) by Electropolymerization as an Alternative for the Substitution of Initiators with Free Radicals

by
Christopher Uriel Landa Valdivia
,
Román Cabrera Sierra
,
Jesús Israel Guzmán Castañeda
,
Karla Jenny Lozano Rojas
and
José Antonio Barraza Madrigal
*
Escuela Superior de Ingeniería Química e Industrias Extractivas, Instituto Politécnico Nacional (ESIQIE—IPN), Ciudad de México, Av. Luis Enrique Erro S/N, Unidad Profesional Adolfo López Mateos, Zacatenco, Gustavo A. Madero, Ciudad de Mexico C.P. 07738, Mexico
*
Author to whom correspondence should be addressed.
Polymers 2025, 17(19), 2656; https://doi.org/10.3390/polym17192656
Submission received: 8 September 2025 / Revised: 26 September 2025 / Accepted: 29 September 2025 / Published: 30 September 2025
(This article belongs to the Section Polymer Chemistry)
Versions Notes

Abstract

In this work the production of poly(3-hexylthiophene) (P3HT) by electropolymerization using different materials as working electrodes is reported. Initially, the tests were carried out under atmospheric conditions with all the electrodes, and subsequently those that showed the best performance were selected to repeat the experiments in an inert atmosphere. The formation of the polymer film on the electrode surface was characterized by Fourier transform infrared spectroscopy (FT-IR) in the mid-infrared region (4000–400 cm−1). This technique allowed the evaluation of the transmittance of P3HT deposited on the electrode surface. The presence of the polymer was confirmed by the appearance of characteristic absorption bands at 2920 cm−1, 2850 cm−1, 850 cm−1 and 730 cm−1. The absorption peaks found at 2920 cm−1, 2850 cm−1 and 850 cm−1 show the presence of the typical functional groups of P3HT. These results suggest that the proposed method could represent a viable alternative for obtaining semiconductor polymers, avoiding the use of initiators with free radicals potentially harmful to human health.
Keywords: P3HT; electropolymerization; FT-IR; semiconductor polymers; free radicals P3HT; electropolymerization; FT-IR; semiconductor polymers; free radicals

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MDPI and ACS Style

Valdivia, C.U.L.; Cabrera Sierra, R.; Castañeda, J.I.G.; Rojas, K.J.L.; Madrigal, J.A.B. Obtaining Poly(3-Hexylthiophene) (P3HT) by Electropolymerization as an Alternative for the Substitution of Initiators with Free Radicals. Polymers 2025, 17, 2656. https://doi.org/10.3390/polym17192656

AMA Style

Valdivia CUL, Cabrera Sierra R, Castañeda JIG, Rojas KJL, Madrigal JAB. Obtaining Poly(3-Hexylthiophene) (P3HT) by Electropolymerization as an Alternative for the Substitution of Initiators with Free Radicals. Polymers. 2025; 17(19):2656. https://doi.org/10.3390/polym17192656

Chicago/Turabian Style

Valdivia, Christopher Uriel Landa, Román Cabrera Sierra, Jesús Israel Guzmán Castañeda, Karla Jenny Lozano Rojas, and José Antonio Barraza Madrigal. 2025. "Obtaining Poly(3-Hexylthiophene) (P3HT) by Electropolymerization as an Alternative for the Substitution of Initiators with Free Radicals" Polymers 17, no. 19: 2656. https://doi.org/10.3390/polym17192656

APA Style

Valdivia, C. U. L., Cabrera Sierra, R., Castañeda, J. I. G., Rojas, K. J. L., & Madrigal, J. A. B. (2025). Obtaining Poly(3-Hexylthiophene) (P3HT) by Electropolymerization as an Alternative for the Substitution of Initiators with Free Radicals. Polymers, 17(19), 2656. https://doi.org/10.3390/polym17192656

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