Excitation energies four states derivation

As a result, the excitation energies for the four states are derived as follows ... 

If one takes the symmetry rules for the integrals into account, the excitation energies for the four states, i.e., Tiu, Tzu, Gu, and Hu, are derived as follows ... 

Triplet excited states of four derivatives of ubiquinone-6 (256), in which various ring substituents are progressively altered, have been studied by laser flash photolysis (265 nm) and pulse radiolysis (9—12MeV electrons). The triplet absorption spectra, extinction coefficients, lifetimes, energy levels, and quantum efficiencies of formation were determined.117... 

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