SYNTHESIS AND STRUCTURE OF NEW COMPLEXES BASED ON SİLVER NANOPARTICLES, RHODAMINE REAGENT AND CETYLTRIMETHYLAMMONIUM BROMIDE

Abstract

The synthesis of new complexes based on silver nanoparticles (AgNPs), the rhodamine reagent (R6G), and cetyltrimethylammonium (CTAB) was carried out, and the optimal conditions for their production were determined. The interaction between rhodamine and Ag nanoparticles, as well as the nature of the synthesized complexes, was studied using infrared (IR) and ultraviolet (UV) spectroscopic analysis methods. The UV analysis revealed that the maximum absorption peaks of R6G are observed at wavelengths of 224 nm, 268 nm, and 304 nm, corresponding to the π-π* transition of the C-C bond and the n-π* transition between the C=N groups. Due to the surface plasmon resonance of the binary complex, new peaks appear in the absorption spectra at wave lengths of 242 nm, 271 nm, and 308 nm. In the ternary complex, peaks in the absorption band are observed at wavelengths of 215 nm, 243 nm, and 278 nm. The spectroscopic properties of R6G and its binary and ternary complexes were further investigated through IR analysis. The aromatic C-H bonds of the phenyl group appear in the range of 3000-3100 cm⁻¹, while the C=C bonds of the phenyl group are found around 1500-1600 cm⁻¹. The carbonyl (C=O) bonds of the carbazide group are observed in the range of 1650-1700 cm⁻¹. Peaks associated with the N-H groups are found between 1400-1600 cm⁻¹. The interaction between rhodamine and AgNPs was assessed by analyzing the shifts and intensity changes in the IR absorption bands.