Application of the Green's function theory to the calculation of ionization potentials of model oligomeric systems

Abstract
The vertical ionization potentials of model hydrogen chains have been calculated, in the framework of STO‐3G and 4‐31G bases, at the second‐order level of the many‐body Green's function theory. Compared to the second‐order many‐body perturbation theory, this approach provides a qualitative description of trends observed with orbital relaxation, pair removal, and pair relaxation effects when studying oligomeric systems of increasing size with varying bond length.

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