Visualization of vibrational-resolution charge transfer enhanced resonance Raman scattering spectroscopy.

In this paper, we report visualization of vibrational-resolution charge transfer enhanced resonance Raman scattering Spectroscopy. Based on the first-principles calculation method, we calculated and analyzed the electronic excitation characteristics of the molecules as well as the spontaneous Raman and resonance Raman spectra. Through the visualization of the electronic excitation characteristics, it is found that the Raman signal of the atomic group vibration mode occupied by the charge transfer excitons is significantly enhanced. Super-exchange charge transfer excitons enhance the polarizability by enhancing the dipole moment, ultimately enhancing the Raman optical signal.