Exploring the interaction between graphyne and Purinethol: A DFT study of drug loading capacity

Abstract

Within this piece of research, DFT calculations were undertaken in order to investigate the drug-loading performance of graphyne for Purinethol. In order to evaluate the possibility of using graphyne as a carrier, the energetic, geometrical and optimized attributes of graphyne, Purinethol, and the complex of graphyne and Purinethol were investigated. We investigated three sites, namely a, b and c, in the structures of Purinethol for its interaction with graphyne. The most suitable interaction was the one in which sulfur and nitrogen atoms were involved. Purinethol had an interaction with graphyne with the adhesion-energy of −1.87 eV in the gaseous phase. The non-covalent interaction analysis was performed to explore the interaction of graphyne with Purinethol. Based on the analysis results, the interaction forces of the complex of graphyne and Purinethol were weak. The HOMO-LUMO analysis and charge-decomposition analysis were performed to describe the charge transported from Purinethol to graphyne during the formation of graphyne and Purinethol. The results demonstrated the possibility of using graphyne as a suitable carrier for Purinethol. The theoretical results obtained within this work can inspire researchers to find novel 2D nanomaterials for drug delivery purposes.