Sequence of electron transition in three bisphenol F isomers from difficulty to ease is 2,2′-BPF, 2,4′-BPF, and 4,4′-BPF.

The FTIR absorption peak strength of the 4,4′-BPF increases significantly in a polar solvent.

The Raman spectra variation of the 4,4′-BPF in the polar solvent is limited.

New characteristic peaks occur in the FTIR spectra and Raman spectra along with an increase in the hydroxyl group amount.

The order of the red shifts in the UV spectra is opposite of the order of the substitution element electronegativity values.