title: The polythiophene molecular segment as a sensor model for H2O, HCN, NH3, SO3, and H2S: a density functional theory study.
abstract: Studying the interaction of some atmospheric gases (H2O, HCN, NH3, SO3 and H2S) with 3PT oligomers is important in the development of polymeric sensors for gas detection. In the present study, we studied the relaxed geometries, interaction energies, charge analysis, HOMO-LUMO orbital analysis, and UV-vis spectra of all interacted systems using first-principles density functional theory (DFT). All these analyses indicated the potential of polythiophene as an inexpensive polymeric sensor for the analytes mentioned. Interaction energy values of -19.90, -19.66, -14.01, -8.70, and -4.76 kJ mol(-1) were achieved for adsorption of SO3, H2O, NH3, HCN, and H2S on 3PT, respectively. Consequently, clarification of their physical parameters became the major focus of this study.
authors.affiliation: Department of Chemical Engineering, Qaemshahr Branch, Islamic Azad University, Qaemshahr, Iran. a.shokuhi@gmail.com.
authors.forename: Ali
authors.initials: A
authors.lastname: Shokuhi Rad
authors.affiliation: Department of Chemical Engineering, Qaemshahr Branch, Islamic Azad University, Qaemshahr, Iran.
authors.forename: Mehri
authors.initials: M
authors.lastname: Esfahanian
authors.affiliation: Department of Chemical Engineering, Babol Noshirvani University of Technology, Babol, Iran.
authors.forename: Etesam
authors.initials: E
authors.lastname: Ganjian
authors.affiliation: Department of Textile Engineering, Qaemshahr Branch, Islamic Azad University, Qaemshahr, Iran.
authors.forename: Habib-Allah
authors.initials: HA
authors.lastname: Tayebi
authors.affiliation: Department of Chemistry, Pharmaceutical Sciences Branch, Islamic Azad University, Tehran, Iran.
authors.forename: Samaneh Bagheri
authors.initials: SB
authors.lastname: Novir
keywords: Adsorption; DFT; Molecular interaction; Polymeric sensor; Polythiophene