The conformational feature of noncovalent complexes of two borondifluoride chalcone derivatives was assessed using DFT-D2. The corresponding optical properties were analyzed based on time-dependent density functional theory calculations. As already described in such complexes, the pi-stacking interaction existing between both fragments allowed formation of a new absorption band corresponding to the S0 -> S1 transition. However, this band appears very close to the most intense band corresponding the S0 -> S2 transition.