IR and NMR spectrum analysis of chemical structure of absorbents.

(A) IR spectrum (KBr tablet); A Prestige-21 Fourier transform infrared spectrophotometer (Shimadzu Corporation, Kyoto, Japan) was used in the Central Research Laboratory in the Shiga University of Medical Science. Peaks of polysulfone skeleton were detected at 2968, 1579, 1487, and 1248 cm^-1 (arrow heads). The carbonyl (C = 0) stretch of amidomethyl group was detected at 1671 cm^-1 (arrow). (B) NMR spectrum (Chloroform-D); A JNM-ECZ400S NMR spectrometer (JEOL Ltd., Tokyo, Japan) was used in the Central Research Laboratory in the Shiga University of Medical Science. Levels of isopropylidene hydrogen of polysulfone skeleton (6H) (a), a peak of CH₂ in chloroacetyl group (b), peaks of CH₂ in an aminobenzyl group (c), and aromatic hydrogen (left peaks) were 1.66 ppm (singlet), 3.8 ppm (singlet), 4.35 ppm (doublet), and 6.8 – 7.9 ppm, respectively. (PDF)