**Author details**

**4. Conclusion**

at different pH values.

168 Fourier Transforms - High-tech Application and Current Trends

The modern Fourier transform infrared spectroscopic techniques (linear scan, reflection, trans‐ mission, mapping, video analysis) in combination with diffraction (XRD), energy‐dispersive X‐ray (EDX), spectrophotometric (UV‐Vis), and electronic microscopy (SEM) methods are applied in the structure analysis of synthesized green nanoparticles and polysaccharide complexes, as well as for the confirmation of suggested types of complexes structure and for the testing of samples homogeneity. In this respect, silver nanoparticles were prepared with dextran sulfate or carboxymethyl dextran as a reducing and capping agent, while cobalt biocomplexes were synthesized with reduced low‐molar dextran as ligand. Comparison of FTIR spectra of initial exopolysaccharide compounds (DS, CMD, RLMD) and final products (AgNP‐DS, AgNP‐CMD, Co(II)‐RLMD complexes), in the specific region of characteristic functional group vibrations, has indicated on coordination complexes forming as a part of complex structure. FTIR spectroscopic analysis has shown that interactions between metal

**Figure 15.** Different FTIR microscopic profiles (A–C) (300 μm × 250 μm) for ligand (RLMD) and Co(II)‐RLMD complexes

ions and specific polysaccharide functional groups have steric character and suggest 4

formation of the glucopyranose unit. The existence of nanoparticles (in range of 10–60 nm) has been confirmed by SPR band in the UV‐Vis spectra, by SEM microscopy, and XRD meth‐

C1 con‐ Goran S. Nikolić1 \*, Milorad D. Cakić1 , Slobodan Glišić1 , Dragan J. Cvetković1 , Žarko J. Mitić2 and Dragana Z. Marković<sup>3</sup>

\*Address all correspondence to: goranchem\_yu@yahoo.com

1 Department of Chemical Technology, Faculty of Technology, University of Niš, Leskovac, Serbia

2 Department of Chemistry, Faculty of Medicine, University of Niš, Niš, Serbia

3 High Technologically Artistic Professional School, Leskovac, Serbia
