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Polythiophene as a sensor model for chlorofluorocarbon, fluorine, and oxygen gas using DFT calculations

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Adsorption of CCl3F, CCl2F2, CClF3, F2, and O2 has been investigated systematically on the polythiophene (PT) moieties using density functional theory (DFT) calculations at the B3LYP/6-31G (d) level. Here, geometry optimizations have been performed on some polythiophene (5PT and 7PT) complexes. Likewise, adsorption energies, dipole moments, HOMO–LUMO orbital analysis, density of states (DOSs), global indices, and UV–vis spectra are calculated using the DFT method. Energies of interaction and HOMO–LUMO gap show that polythiophene has the highest sensitivity toward O2 for B3LYP functional. According to our findings, CFCs, F2, and O2 molecules can be physically adsorbed on the moieties of polythiophene.

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Data Availability

All data generated or analyzed and related materials (with supplementary materials) are included in this manuscript.

Code availability

The calculations have been carried out using Gaussian 09 and GaussView version 6.0 provided by Gaussian, Inc.


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We highly acknowledge the software support from the Department of Physics, Computational Condensed Matter Physics Laboratory, Jahangirnagar University, Dhaka, Bangladesh. We thank the Jashore University of Science and Technology (JUST) for letting us run the optimization jobs at the Faculty of Science, Department of Physics.

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Md. Mehade Hasan and Shahida Aktar Bithe wrote the first draft of the paper. Besides, the first and corresponding author Md. Mehade Hasan has done the formal analysis, data generation, and investigation of the results and discussion part. All authors revised and approved the final version of the manuscript.

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Correspondence to Md. Mehade Hasan.

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Hasan, M., Bithe, S.A., Neher, B. et al. Polythiophene as a sensor model for chlorofluorocarbon, fluorine, and oxygen gas using DFT calculations. J Mol Model 28, 59 (2022).

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