i have FTIR spectrum for dried powder of Eucalyptus camaldulensis leaves , i want to determine the functional groups and biomolecules which could be responsible as well as stabilization of nanoparticles
Standard spectroscopy undergraduate text books would be your first starting point (one example: "Spectroscopic Methods in Organic Chemistry" by Williams and Fleming) so that you can look up the wavenumber resonances of common functional groups. It looks like you have an -OH (or your sample contains a lot of water) which is the broad feature at 3424. Find the common components of eucalyptus oil (for example http://www.eucalyptusoil.com/eucalyptus-history) then look up their chemical structures.
(Edit - I also agree with Omar Gonzalez-Ortega below - you will be able to identify the _general_ types of functional groups contributing to the resonances you observe but the sorts of molecules you're looking at will give overlapping FTIR spectra so you won't be able to say "this resonance is from this particular molecule")
go through these papers.
Priyadarshi, D., Karar, P.K.: Utilising FTIR and Gas chromatograph for optimizing lipid extraction for biodiesel production from domestic sewage sludge and Food waste 21, (2017). In press.
Mahamuni, N.N., Adewuyi, Y.G.: Fourier transform infrared spectroscopy (FTIR) method to monitor soy biodiesel and soybean oil in transesterification reactions, petrodiesel- biodiesel blends, and blend adulteration with soy oil. Energy and Fuels 23, 3773–3782 (2009). doi:10.1021/ef900130m
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