Figure 3

ATR-FTIR spectra of studied compounds in the range of 4000–500 cm−1 (A) with spectra enlargement in the range of 2000–500 cm−1 (B).

ATR-FTIR spectra of studied compounds in the range of 4000–500 cm−1 (A) with spectra enlargement in the range of 2000–500 cm−1 (B).