NLO response of derivatives of benzene, stilbene and diphenylacetylene：MP2 and DFT calculations  

作　　者：A.M. Elhorri M. Zouaoui-Rabah 

机构地区：[1]Laboratoire de Microscopie, Microanalyse et Spectroscopie Mol&ulaire, Faculty of Sciences, Djillali Liabes University of Sidi-Bel-Abbes, 22000 Sidi-BeI-Abbes, Algeria

出　　处：《Chinese Journal of Chemical Engineering》2017年第6期800-808,共9页中国化学工程学报（英文版）

摘　　要：MP2 method and different functionals such as M06-HF, M06-2X, CAM-B3 LYP, PBE0, B3 LYP and M06 L incorporating different XC amounts were used to calculate the static first hyperpolarizabilies β(0) of eight molecules which are derivatives of benzene, stilbene and diphenylacetylene. The values were then compared to the experimental ones. The M06-2X functional was then selected for further calculations. NBO calculations were also performed to define the intramolecular charge transfer in each molecule. TD-DFT calculations were performed taking into account the solvent effect using the IEF-PCM formalism. Some parameters characterizing the vertical transitions such as the wavelength of the maximum absorption λ_(max) were compared to the experimental ones. Finally,solvation Gibbs free enthalpy ΔG_(solv) values have also been examined in order to determine which the specific solvent for a given molecule is.MP2 method and different functionals such as M06-HF, M06-2X, CAM-B3 LYP, PBE0, B3 LYP and M06 L incorporating different XC amounts were used to calculate the static first hyperpolarizabilies β(0) of eight molecules which are derivatives of benzene, stilbene and diphenylacetylene. The values were then compared to the experimental ones. The M06-2X functional was then selected for further calculations. NBO calculations were also performed to define the intramolecular charge transfer in each molecule. TD-DFT calculations were performed taking into account the solvent effect using the IEF-PCM formalism. Some parameters characterizing the vertical transitions such as the wavelength of the maximum absorption λ_(max) were compared to the experimental ones. Finally,solvation Gibbs free enthalpy ΔG_(solv) values have also been examined in order to determine which the specific solvent for a given molecule is.

关 键 词：First HYPERPOLARIZABILITY DFT TD-DFT Push-pull molecules NBOCharge transfer 

分 类 号：O625.1[理学—有机化学]