“…However, the results from TD-DFT of those compounds using the popular B3LYP functional in the gas phase could differ from the data calculated in the implicit solvent and different DFT functionals. Lately, there are some reports indicating that the TD-B3LYP method can be used to simulate the spectra of basic and small compounds, but TD-B3LYP cannot be applied for medium-sized compounds. ,,− In contrast, some long-range (LC) corrected functions could give better agreement results with the experiments. ,− ,− Moreover, the LC-BLYP functional has been applied to simulate the absorption and emission spectra of some small- and medium-sized organic dyes and fluorophores inheriting the ICT character. ,,,− This seems that LC-BLYP may be suitable for the TD-DFT calculations of the fluorophores, although the adjustable damping parameter (μ) is its drawback. ,, The theory of LC is not described here since the LC method introduced initially by Seminario and Gill was developed and reported and the tuning of the μ value used for the two-electron repulsion operator was described elsewhere. ,,,,− …”