Kocaeren, Aysel AydinKaratag, Elifnur2025-01-272025-01-2720231026-12651735-5265https://doi.org/10.1007/s13726-023-01211-7https://hdl.handle.net/20.500.12428/25693We synthesized the Schiff bases and their polymers, which contain thiophene units. For the synthesis process, first, hydroxynaphthalene di- and triol-derived Schiff bases that are abbreviated as (A1) and (A2) were prepared by a common condensation reaction. Second, their polymers named as B1 and B2 were separately synthesized from the oxidative polycondensation of the Schiff base monomers with (NH4)(2)S2O8 in an aqueous alkaline medium. The new polymeric structures that are abbreviated as B1-S and B2-S, containing thiophene groups, were synthesized by HBr elimination using B1 and B2 polymers. The characterization processes of the synthesized products were carried out using spectroscopic techniques such as FTIR, UV-Vis, H-1 and C-13 NMR, TG-DTG analysis, and MALDI-TOF MS. According to the TG analysis results, except for A2, the thermal stabilities of the other compounds were good since they left about 50% residue at 800 degrees C. SEM images of the compounds were recorded at different sizes, and also they were found to be quite different from each other. For example, A1 was like a ball. Additionally, A1, A2, B1, B2, B1-S, and B2-S were tested for their anti-bacterial activities against some bacteria types. Minimum inhibitory concentration (MIC) method was used for the anti-bacterial activity tests. The MIC test results showed that the synthesized polymers could be used as antimicrobial agents for surfaces with P. vulgaris NRRLB-123 bacteria at lower concentrations such as 15.625 and 31.25 mu g/mL. [GRAPHICS] .eninfo:eu-repo/semantics/closedAccessHBr eliminationOxidative polymerizationSchiff baseThiopheneAnti-bacterial activitiyArticle32111405141910.1007/s13726-023-01211-7Q3WOS:0010418640000012-s2.0-85166563098Q2