Table 4 FT-IR data of AN, BZ, their PM and CCs

C–O stretch

1176–1214 (acidic)

1175–1279 (acidic)

1177–1294 (acidic)

1067 (alcohol)

–C–H bending

1366–1451 (alkane)

–

–

1386–1450 (alkane)

C=O stretch

–

1684 (carbonyl)

1649–1743 (carbonyl)

1624 (carbonyl)

O–H stretch

–

3609–3794 {alcohol (non-bonded)}

3461–3797 {alcohol (non-bonded)}

3405 {alcohol (bonded)}

C=C stretch

1600–1748 (carbonyl)

–

–

–