"Nanotechnology and nanomaterials"

New 1,2,4-triazole based cationic surfactants in the synthesis of silver and gold nanoparticles
Fizer M.M.1, Fizer O.I.1, Slivka M.V.1, Mariychuk R.T.2
1 Transfer Department of Organic Chemistry, Chemical Faculty, Uzhhorod National University. Pidhirna, 46, Uzhhorod-88000, Ukraine. 
E-mail: max.fizer@uzhnu.edu.ua
2 Department of Ecology, Faculty of Humanity and Natural Sciences, University of Presov in Presov, 17th November, 1, Presov-08116, Slovak Republic.

Series of new cationic 1,2,4-triazole based surfactants have been tested as stabilizers for the synthesis of metal nanoparticles (NPs). The actuality of a search for new surfactant stabilizers is dictated by the high toxicity of the popular surfactant cetyltrimethylammonium bromide (CTAB). Oppositely, in our previous study, we have established low virtual toxicity of 1,2,4-triazole surfactants [1].
Here we have investigated surfactants of the [1,3]thiazolo[3,2-b][1,2,4]triazol-7-ium family. According to their structure, the considered compounds can be divided into three classes: with long alkyl chain (C4-C8) in position 3 of the [1,3]thiazolo[3,2-b][1,2,4]triazol-7-ium core (I); with long alkyl chain (C5-C17) in position 2 (II); and substances with long alkyl chains in both positions 2 and 3 of the condensed system (III). 
The formation of metal NPs was investigated by UV-Vis and IR spectroscopy. The considered compounds show different stabilizing activity, which can be characterized by the degradation time of NPs' colloid systems. A number of theoretical DFT and ab initio computations were performed to explain the interaction of the new surfactants with metal NPs.

1.	Fizer M.M., Slivka M.V., Mariychuk R., Fizer O.I., Korol N.I., Kryvoviaz A.O., Lendel V.G. Theoretical estimation of toxicity of new condensed heterocyclic cationic surfactants. // 2019 International Council on Technologies of Environmental Protection (ICTEP), Starý Smokovec, Slovakia -2019.-P.87-90.