Quantum chemical study the interaction between thiotepa drug and silicon doped graphdiyne

By using the calculation of the first principles, we examined the electronic features of pristine graphdiyne nanosheet (GDY) and Si-doped graphdiyne (SiGDY). Moreover, the adsorption of thiotepa (TPA) drug at both GDY and SiGDY sheet surfaces by energy of adsorption, charge transfer (CT), and change electrical conductivity have been investigated. It is proved, the inclination of pristine GDY to TPA drug is insignificant. In addition, the bandwidth energy has changed only about 7.85%, after adsorbing TPA on the GDY surface. Whereas, in the gaseous and aqueous phase, the energy value of TPA adsorption on the SiGDY has been determined about −18.75 and −49.39 kcal/mol, respectively. The solvation energy value exhibits the solubility of the recommended medicines in water phase. Also, the prerequisite for adsorption of the TPA with appropriate binding energies is a noticeable charge transfer between the TPA and SiGDY sheet, which delivers silicon with a considerable positive charge. Further, SiGDY is an electronic sensor for TPA detection unlike pristine GDY, because the electrical conductivity of SiGDY has been increased by about 20.62% after TPA adsorption.