20.500.12556/DKUM-92257 Poly(vinyl pyridine) and Its quaternized derivatives: understanding their solvation and solid state properties A series of N-methyl quaternized derivatives of poly(4-vinylpyridine) (PVP) were synthesized in high yields with different degrees of quaternization, obtained by varying the methyl iodide molar ratio and affording products with unexplored optical and solvation properties. The impact of quaternization on the physicochemical properties of the copolymers, and notably the solvation properties, was further studied. The structure of the synthesized polymers and the quaternization degrees were determined by infrared and nuclear magnetic spectroscopies, while their thermal characteristics were studied by differential scanning calorimetry and their thermal stability and degradation by thermogravimetric analysis (TG-DTA). Attention was given to their optical properties, where UV-Vis and diffuse reflectance spectroscopy (DRS) measurements were carried out. The optical band gap of the polymers was calculated and correlated with the degree of quaternization. The study was further orientated towards the solvation properties of the polymers in binary solvent mixtures that strongly depend on the degree of quaternization, enabling a better understanding of the key polymer (solute)-solvent interactions. The assessment of the underlying solvation phenomena was performed in a system of different ratios of DMSO/H2O and the solvatochromic indicator used was Reichardt’s dye. Solvent polarity parameters have a significant effect on the visible spectra of the nitrogen quaternization of PVP studied in this work and a detailed path towards this assessment is presented. poly(4-vinylpyridine) poly(N-methyl-4-vinylpyridinium iodide) quaternization solvatochromism preferential solvation optical energy gap polimeri kvaternizacija solvatokromija solvatacija true false true MDPI AG Angleški jezik Slovenski jezik https://www.mdpi.com/journal/polymers © 2022 by the authors Članek v reviji 2025-03-26 07:39:41 2025-03-26 07:39:41 2025-03-27 03:11:50 0000-00-00 00:00:00 2022 0 0 17 str. iss. 4 (804) Vol. 14 Feb. 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2022-01-27 2022-02-17 2022-02-19 543.2 106889731 10.3390/polym14040804 2073-4360 polymers-14-00804.pdf polymers-14-00804.pdf 1 FC3C672F25B02D6B6A21A6EC07072D71 cb7b2cfb1e22e54a5b63231fd91c36f2c74a6e9c4d712656ae270d5d8b2cd607 dae2deba-0a0d-11f0-af23-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=189652 https://www.mdpi.com/2073-4360/14/4/804 0 e29c501b-0a0d-11f0-af23-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=189653 Fakulteta za strojništvo 0 0 0