Abstract
The spectral characteristics and structure of acridine crystal were obtained using density functional theory (DFT) calculations. The absorption coefficient at the different wavelengths and energies in acridine molecular were determined using the x-ray absorption spectroscopy (XAS) and UV-Vis (ultraviolet-visible) absorption spectra approaches. We discussed the possible resultsusing the x-ray absorption of acridine to probe the quantum coherence and correlations of the electronic transition from HOMO to LUMO with energy gap +6.6646 eV. Our calculations are in agreement with the experiments.