On the Electronic Molecular Structure of the Organic Semiconductor Copper Phthalocyanine

The electronic eigenvalue problem of the molecule of copper phthalocyanine is approximated using the molecular orbital formalism. The symmetry of the molecule allows a group theoretical reduction of the secular equations and a classification of the eigenvalues and eigenfunction coefficients. The model statements are compared with the experimental molecular spectra in the vapour phase and in solution from the near UV to the near IR.