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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*