A Theoretical Study on the Structure–Radical Scavenging Activity of Some Hydroxyphenols
Year
: 2016
Abstract: Antioxidants are made for the struggle and reconstruction of the damaged cells, because of their ability in destroying the free radicals. On account of their importance, a theoretical procedure was applied for the study of the molecular structure and radical scavenging activity of six hydroxyphenols which have been introduced as antioxidant compounds. All the Geometry structures were optimized by M06-2X, MPWB1K with 6-311++G (d, p) basis in the gas phase and solvent using the CPCM model. Three probable mechanisms for the antioxidant activities have been presented and analyzed. According to bond dissociation enthalpy (BDE) and ionization potential (IP) values, hydrogen atom transfer (HAT) mechanism is a more reasonable path for antioxidant activity. The contribution of the HOMO-LUMO orbitals and spin density distribution have been calculated for evaluating of the previous data. Finally, based on the comparison of the experimental and the calculated data, BDE mechanism showed the best agreement.
Keyword(s): antioxidants,bond dissociation energy,density functional theory,hydrogen atom transfer,ionization potential
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A Theoretical Study on the Structure–Radical Scavenging Activity of Some Hydroxyphenols
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| contributor author | رامش خیرآبادی | en |
| contributor author | محمد ایزدیار | en |
| contributor author | ramesh kheirabadi | fa |
| contributor author | Mohammad Izadyar | fa |
| date accessioned | 2020-06-06T13:27:02Z | |
| date available | 2020-06-06T13:27:02Z | |
| date issued | 2016 | |
| identifier uri | http://libsearch.um.ac.ir:80/fum/handle/fum/3355335 | |
| description abstract | Antioxidants are made for the struggle and reconstruction of the damaged cells, because of their ability in destroying the free radicals. On account of their importance, a theoretical procedure was applied for the study of the molecular structure and radical scavenging activity of six hydroxyphenols which have been introduced as antioxidant compounds. All the Geometry structures were optimized by M06-2X, MPWB1K with 6-311++G (d, p) basis in the gas phase and solvent using the CPCM model. Three probable mechanisms for the antioxidant activities have been presented and analyzed. According to bond dissociation enthalpy (BDE) and ionization potential (IP) values, hydrogen atom transfer (HAT) mechanism is a more reasonable path for antioxidant activity. The contribution of the HOMO-LUMO orbitals and spin density distribution have been calculated for evaluating of the previous data. Finally, based on the comparison of the experimental and the calculated data, BDE mechanism showed the best agreement. | en |
| language | English | |
| title | A Theoretical Study on the Structure–Radical Scavenging Activity of Some Hydroxyphenols | en |
| type | Journal Paper | |
| contenttype | External Fulltext | |
| subject keywords | antioxidants | en |
| subject keywords | bond dissociation energy | en |
| subject keywords | density functional theory | en |
| subject keywords | hydrogen atom transfer | en |
| subject keywords | ionization potential | en |
| journal title | Physical Chemistry Research | fa |
| pages | 73-82 | |
| journal volume | 4 | |
| journal issue | 1 | |
| identifier link | https://profdoc.um.ac.ir/paper-abstract-1053085.html | |
| identifier articleid | 1053085 |