Features of silver nanoparticles synthesis and interaction with dibutyl phthalate in aqueous solutions for sensor applications

Кулагина А.С., Шугабаев Т., Евстропьев С.К., Кузнецов А., Убыйвовк Е.В., Шмаков С.В., Березовская Т.Н., Букатин А.С., Цырлин Г.Э., Данилов В.В. Особенности синтеза наночастиц серебра и взаимодействия с дибутилфталатом в водных растворах для сенсорных применений // Оптический журнал. 2023. Т. 90. № 10. С. 116–128. http://doi.org/10.17586/1023­-5086­-2023­-90-­10­-116­-128

Kulagina A.S., Shugabaev T., Evstropiev S.K., Kuznetsov A., Ubyivovk E.V., Shmakov S.V., Berezovskaya T.N., Bukatin A.S., Cirlin G.E., Danilov V.V. Features of silver nanoparticles synthesis and interaction with dibutyl phthalate in aqueous solutions for sensor applications [In Russian] // Opticheskii Zhurnal. 2023. V. 90. № 10. P. 116–128. http://doi.org/10.17586/1023­-5086­-2023­-90­-10­-116­-128

Subject and purpose of the study. The subject of the study is the quantitative and qualitative features of the complex formation of nanoparticles of metallic silver and phthalates. The purpose of this work was to determine the conditions for the formation of stable complexes of silver nanoparticles with dibutyl phthalate in an aqueous solution. To achieve the goal a full cycle of comparative studies of silver nanoparticles has been carried out from synthesis to establishing the possibility of binding dibutyl phthalate for further creation of an accessible sensor based on them for determination of various phthalates in water. Methods. Chemical methods were used for the synthesis of nanoparticles, the modification of their surface with nucleotides, and the connection of nanoparticles with phthalates. To study the interaction of silver nanoparticles with each component of organo­inorganic complex, namely sodium citrate (hereinafter referred to as citrate), uridine­5ў­triphosphate (hereinafter referred to as uridine or UTP), copper ions (Cu²⁺) and dibutyl phthalate (DBP), methods of optical spectroscopy and transmission electron microscopy were used. Main results. Metallic silver nanoparticles have been synthesized using four agents safe for humans, acting simultaneously as a reducing agent and stabilizer (citrate, polyethylene glycol, polyvinylpyrrolidone, orange extract). Nanoparticles, synthesized using sodium citrate, were selected for further use as phthalate sensors in terms of stability parameters and range of research methods. The change of the silver nanoparticles’ ligand shell by uridine molecules and the formation of chemical bonds between them and phthalate involving copper ions have been shown. Raman spectra and transmission electron microscopy images of Ag/UTP­Cu²⁺­DBP complexes were obtained for the first time, confirming the chemical bonding of silver nanoparticles and phthalates. The optimal molar ratio of Ag/UTP nanoparticles and copper ions in solution for the subsequent process of complex formation has been found. Practical significance. The formation of complexes between dibutyl phthalate and modified silver nanoparticles has been shown for the first time in the absence of alcohol and any buffer solutions. The detection of phthalates using silver nanoparticles is a promising technology for creating a simple nanosensor with additional plasmonic and antibacterial properties. Besides the extremely important ecological significance of the study of hybrid systems based on Ag nanoparticles, it also contributes to the development of methods for passivation of the surface of metal nanoparticles. In a broad sense, the studies carried out are of interest for the development of sensor detection technologies for organic­inorganic compounds.