Can anybody help me, I got shoulder at 3249 cm-1 of my FTIR spectra in addition to a peak around 3400 cm-1 attach is the spectra please?

Fartisincha P Andrew @Fartisincha-Andrew

24 August 2021 1 3K Report

The material is a biopolymer (biomass) The broad peak I think is an OH peak suggesting an intermolecular hydrogen bonding interaction normally observed in homopolymers and copolymers. but the shoulder around 3249 I got no explanation.

Mário Silva

Hi.

I believe that, if not an artefact, peaks at 3249 cm-1 can typically be explained by the presence of clusters containing significant amounts of three- and four-coordinated water molecules. However, it's been long since I worked with FTIR so double-check this.

Cheers!

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