Mahmoud Mirzaei; Oguz Gulseren; Elham Jafari; Mehdi Aramideh
Abstract
Density functional theory (DFT) calculations have been performed to study properties of chitosan (Chit) as a possible vehicle for carrying metformin (Met) drug. To this aim, the singular molecules of Met and Chit have been first optimized and sixteen possible bimolecular complexes have been subsequently ...
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Density functional theory (DFT) calculations have been performed to study properties of chitosan (Chit) as a possible vehicle for carrying metformin (Met) drug. To this aim, the singular molecules of Met and Chit have been first optimized and sixteen possible bimolecular complexes have been subsequently constructed and optimized to obtaine the stabilized interacting structures. Two bimolecular complex have been seen as the most powerful interacting systems among all complexes. N5 and N8 atoms of Met are very much important atoms for interacting with Chit counterpart. Molecular parameters such as molecular orbital energies and dipole moments approved the effects of interations on both Chit and Met counterparts. Atomic scale quadrupole coupling constants demonstrated the effects of interactions on the electronic atomic sites. As a final remark, although the Chit could be used as a vehicle for Met; but further investigations are still required to see what’s happening inside the molecular systems.

Amir Hossein Rasouli Amirabadi; Mahmoud Mirzaei
Abstract
Photosensitization properties of coronene-purine (Cor-P) hybrids for photodynamic therapy (PDT) have been investigated in this work. Eight hybrid Cor-P models have been designed by the additional of adenine (A) and guanine (G) nucleobase to Cor species. The evaluated absorption and emission energies ...
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Photosensitization properties of coronene-purine (Cor-P) hybrids for photodynamic therapy (PDT) have been investigated in this work. Eight hybrid Cor-P models have been designed by the additional of adenine (A) and guanine (G) nucleobase to Cor species. The evaluated absorption and emission energies indicated that the singular models are not good at all for PDT process whereas their hybrid models are very much useful for the purpose. Although the Cor-A models are very much better for visible region, but the Cor-G models could be also used in the near-infrared region. The main point of these materials is to generate singlet molecular oxygen, in which all investigated Cor-P hybrids could supply the required energy for triplet to singlet conversion of molecular oxygen. This work has been done based on the advantage of quantum computation for solving the problems in living systems.

Amir Hossein Rasouli Amirabadi; Mahmoud Mirzaei
Abstract
Time-dependent density functional theory (TD-DFT) calculations were performed to study photosensitizing properties for porphrazine and eleven of its related derivatives. Two model categories have been considered based on the existence of CN functional group in addition to the other functional groups; ...
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Time-dependent density functional theory (TD-DFT) calculations were performed to study photosensitizing properties for porphrazine and eleven of its related derivatives. Two model categories have been considered based on the existence of CN functional group in addition to the other functional groups; H, CH3, F, CF3, C6H5, and C6F5. The CN group could moderate the molecular level energy properties in which the required absorption wavelengths were almost similar in the models. The numbers of the generated 1O2 molecules are almost around one and some others, in which the numbers are slightly changed for the models based on the required absorption wavelengths. As a final remark, the chemicals could be used with safer wavelength regions for applications on living tissues based on their dominant functional groups.
