جستجوی مقالات مرتبط با کلیدواژه "lomustine" در نشریات گروه "شیمی"

By developing nanotechnology, nanocarriers, for example, carbon nanotubes (SWCNTs), can be used as a suitable tool for targeted drug delivery. In this study, the physical chemistry properties of the interaction of the anti-cancer drug Lomustine with carbon nanotube (5,0) zigzag doped with iron or chromium atoms have been investigated. In the first step, the adsorption features, which is a key factor in the drug delivery system, has investigated to measure the efficiency of carbon nanotubes (5,0). In this regard, the density functional theory (DFT) method has used and the calculations have performed at the B3LYP/6-311G (d, p) theoretical level. To achieve the desired aim in this study, structural parameters such as adsorption energy, dipole moment, density of state plots, energy gap and the energies of molecular orbitals have calculated and studied. The results have shown that the orbital energy level was significantly decreased by adsorption of the drug on nanotubes doped with iron or chromium atoms. Other properties of this interaction such as chemical potential, chemical hardness and softness, and electrophilicity, also change significantly.

In this study, lomustine interaction with graphene quantum dots was evaluated by infrared (IR), natural bond orbital (NBO) and frontier molecular orbital (FMO) computations. The negative values of adsorption energy, enthalpy changes, Gibbs free energy variations showed lomustine adsorption on the surface of graphene quantum dots is exothermic, spontaneous and experimentally feasible. Structural parameters including the energy of HOMO and LUMO orbitals, bandgap, electrophilicity, chemical potential, chemical hardness, density and zero-point energy were also calculated and discussed. The remarkable decrease in bandgap after the lomustine adsorption on the surface of graphene quantum dots demonstrated that the electrochemical conductivity and electrocatalytic properties increased after adsorbate interaction with the adsorbent and graphene quantum dots can be used for construction of new electrochemical sensor in order to lomustine detection and quantitation. In addition, this phenomenon showed lomustine complexes with graphene quantum dots have better reactivity and bioavailability than the pure drug molecule without nanostructure.