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A Theoretical Study of the Vibrational  Energy Redistribution in the Chemically Activated CH3OOH Complex

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 M.Sc.Thesis In Physical Chemistry

A Theoretical Study of the Vibrational  Energy Redistribution in the Chemically Activated CH3OOH Complex

       In this study‚ we investigated the intramolecular vibrational redistribution IVR″  for the chemically activated CH3OOH that is formed in associative reaction                     ″CH3O + OH″.

  We use VENUS96 program that is a dynamics program to study the energy distribution from the newly formed O-O bond to the other bonds in CH3O-OH and also to study the coupling between the other vibratinal modes like C-H bonds.

  The excitation energy flows irreversibility out of O-O stretch that usually spread to C-O bonds. The most of energy spread in CO bond and its amplitude is greater at the higher levels. Also we noticed the vibrational energy exchange between  three C-H bonds. Our results showed the coupling between stretching modes with bending modes.

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Chapter 1: Introduction………………………………………………………………..5

   1-1-The role of computer calculations…………………………………………….6

   1-1-1-Theoretical and exprimental simulation………………………………….7

   1-2-What is molecular dynamics?…………………………………………………..8

   1-3-Quasiclassical trajectory method………………………………………………8

   1-4-An introduction to VENUS program…………………………………………9

  1-5-Molecular energy levels ………………………………………………………….10

  1-6-Intramolecular vibratinol redistribution……………………………………..12

Chapter 2: Literature Review……………………………………………………….15

Chapter 3:  Method………………………………………………………………………17

 3-1-Ab initio method……………………………………………………………………..18

 3-2-Degree of  vibrational freedom …………………………………………………18

3-3-The vibrating object………………………………………………………………….18

3-4- Average vibrational energy……………………………………………………….19

Chapter 4:  Results and Discussion………………………………………………..23

Tables …………………………………………………………………………………………..23

Figures…………………………………………………………………………………………..26

References……………………………………………………………………………………..34

 

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