Complex formation of titanocene dichloride anticancer and Al12N12 nano-cluster: A quantum chemical investigation of solvent, temperature and pressure effects

This study investigated the interaction between Al12N12 nano-cluster and titanocene dichloride anticancer drug complex using B3P86 functional in gas and solution phases. Non-covalent interaction (NCI) analysis of this complex was employed for illustration of the Cl⋯Al weak non-covalent interaction. The self-consistent reaction field theory (SCRF) based on the Polarizable Continuum Model (PCM) was applied for testing the solvent effects. The solvent effect on the interaction energy, dipole moment, frontier orbital energy, and global reactivity parameters was examined as well. The changes in the dipole moment, polarizability and electronic spatial extent (ESE) with solvent polarity were analyzed by applying different solvent polarity parameters based on Lippert-Mataga, Bakhshiev and Bilot-Kawski models. In addition, temperature and pressure effects on the thermodynamic parameters of this interaction were illustrated.

A density functional theory study on the electronic and adsorption characteristics of cyclo M9N9 (M = B and Al)

On the basis of experimental and theoretical calculations conducted for cyclo C₁₈, we predicted two novel inorganic cyclo M₉N₉ (M = B and Al) molecules. Because of the significant difference in electronegativity between M and N atoms, M-N bonds were ionic. Furthermore, the interaction of cyclo M₉N₉ with cyclopropylpiperazine (CPPP) was investigated. In cyclo M₉N₉, each M atom could adsorb one CPPP molecule. The CPPP molecules exhibited a preference to remain outside cyclo M₉N₉ molecules. Depending on the structural characteristics of CPPP molecules, the exciting part is that up to four CPPP molecules could be adsorbed on the exterior surface of cyclo M₉N₉. We calculated adsorption energies and analyzed the main structural parameters in the process. The research results indicated that adsorption on cyclo Al₉N₉ was energetically more favorable than that on cyclo B₉N₉. The cyclo M₉N₉ have considerable potential in the future. Graphical abstract.