Effects of π-stacking interactions on the near carbon K-edge x-ray absorption fine structure: A theoretical study of the ethylene pentamer and the phthalocyanine dimer

Electronic structure of CuTPP and CuTPP(F) complexes: a combined experimental and theoretical study II

CuTPP and CuTPP(F) thick films deposited on Au(111) have been studied by coupling NEXAFS spectroscopy at the ^C/N/FK-edges and ^CuL_2,3-edges and spin-unrestricted TD-DFT calculations.

XAS of tetrakis(phenyl)- and tetrakis(pentafluorophenyl)-porphyrin: an experimental and theoretical study

NEXAFS outcomes and TD-DFT calculations pertaining to H₂TPP and H₂TPP(F) demonstrate the electronic inertness of b_1u porphyrin macrocycle 1s → π* excitations. In fact, corresponding excitation energies, but not their oscillator strength values, are substantially unaffected upon fluorination of Ph rings.

Theoretical study of near-edge X-ray absorption fine structure spectra of metal phthalocyanines at C and N K-edges

The inner shell excitation of CuPc, NiPc, and H(2)Pc phthalocyanines at both C and N K-edges has been investigated theoretically by density functional theory calculations. The selected molecules allow one to study the effect on the spectra of the presence and the nature of the atom in the central cavity of the macrocycle. The individual characteristics of the spectra can be rationalized in terms of the position of the unequivalent C and N atomic sites, showing that sensible changes are present in the spectral features deriving from the N atoms directly bound to the atom at the center of the Pc macrocycle. The minor variations present in the spectral C 1s profiles of the phthalocyanines reflect the little perturbation experienced by the peripheral atomic sites.