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Table 1 FTIR analysis of Padina sp. aqueous extract, 0.01 M of silver nitrate (AgNO3) solution, and silver nanoparticles synthesized by the reduction of 0.01 M silver nitrate with the Padina sp. aqueous extract

From: Synthesis of silver nanoparticles using marine macroalgae Padina sp. and its antibacterial activity towards pathogenic bacteria

Padina sp. aqueous extract0.01 M of silver nitrate (AgNO3) solutionSilver nanoparticles (AgNPs) synthesized
Frequency (cm−1)Bond/stretchingFunctional groupsFrequency (cm−1)Bond/stretchingFunctional groupsFrequency (cm−1)Bond/stretchingFunctional groups
3350.07N–H stretch, O–H stretch, H-bonded1°,2° amines, amides, carboxyl, phenols3350.24N–H stretch, O–H stretch, H-bonded1°,2° amines, amides, alcohols, phenols3422.00O–H stretch, H-bondedAlcohols, phenols
2123.39–C≡C– stretchalkynes2124.36–C ≡ C– stretchalkynes2921.02C-H stretchalkanes
1637.74N–H bend1° amines1635.83N–H bend1° amines1610.46N–H bend1° amines
1329.82N–O symmetric stretchNitro compounds1337.47N–O symmetric stretchnitro compounds1384.27–NO2 (aliphatic) or C–H (plane bend)nitro groups or alkenes
1106.90C–N stretchaliphatic amines1181.13C–H wag (–CH2X)alkyl halides1023.91C–N stretchaliphatic amines