Table 1 FTIR vibrational mode assignment for CAE and CAE–AgNPs.

From: Bioinspired 5-caffeoylquinic acid capped silver nanoparticles using Coffee arabica leaf extract for high-sensitive cysteine detection

Sample

Wave number (cm−1)

IR assignments

Reference

CAE

1299

Vibrations of polyols

42

1640

C = O stretching vibration

43,42

2140

C–H vibrations

44

3291

O–H stretch

45,42

CAE–AgNPs

478, 590

Ag–O, Ag–N vibrations

45,42

1040, 1238

Vibrations of primary alcohol

(–OH) and polyols

43,42

1353

Aromatic band vibrations

45

1640

C = O, C = N stretch

44

3306

O–H stretch

45,42

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