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Table 6 UV-Vis excitation energy and electronic absorption spectra of MBDC using TD-B3LYP/631G + (d,p) method

From: Synthesis, spectroscopic, dielectric, molecular docking and DFT studies of (3E)-3-(4-methylbenzylidene)-3,4-dihydro-2H-chromen-2-one: an anticancer agent

Exp. (nm) Wavelength (nm) Energy (eV) Oscillator strength (f) Assignments
283 296 2.2007 0.0134 π → π*
283 265 2.2684 0.002 π → π*
215 223 2.4147 0.0036 σ − σ*