Fourier transform infrared (FT-IR) spectra of the samples pressed in KBr pellets were collected in a Thermo Nicolet 6700 FTIR spectrometer in the region 4000–400 cm1
Fourier transform infrared (FT-IR) spectra of the samples pressed in KBr pellets were collected in a Thermo Nicolet 6700 FTIR spectrometer in the region 4000–400 cm1