DFT Study of NMR Shielding Tensors and Thermodynamic Properties on Pyrene and its Derivatives

Subject Areas : Journal of Physical & Theoretical Chemistry

R. Zhiani ¹ , M. Anary Abbasinejad ² , M. Tabatabaee ³ , F. Mollaamin ⁴

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Received: 2015-05-23 Accepted : 2015-05-23 Published : 2010-02-01

Keywords: PAH&amp, Pyrene: Isotropic: Anisot,

Abstract :

Emissions from fossil fuel combustion pose a serious threat to public health and =pose the need for animproved monitoring of polycyclic aromatic hydrocarbons (PARS), a major class of persistent organicpollutants. For this purpose the present study reports an investigation of the electronic structure of Pyrene byuse of different chemical models We also made a comparison between different chemical models.Donor — acceptor disubstituted , entropy , enthalpy and Gibbs free-energy vAll be compared too.The isotropic and anisonopic tensor of the pyrene and derivatives structure were calculated with differentchemical models HP/6-3IG, HF/M1-3 l0, BLYP/6-3 ID, BLYP/6-310. , B3LYP/A3 IG, B3LYP.16-3 I 00 and aswell.

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DFT Study of NMR Shielding Tensors and Thermodynamic Properties on Pyrene and its Derivatives