| Title: | Poly(vinyl pyridine) and Its quaternized derivatives: understanding their solvation and solid state properties |
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| Authors: | ID Mavronasou, Katerina (Author)
ID Zamboulis, Alexandra (Author)
ID Klonos, Panagiotis A. (Author)
ID Kyritsis, Apostolos (Author)
ID Bikiaris, Dimitrios (Author)
ID Papadakis, Raffaello (Author)
ID Deligkiozi, Ioanna (Author) |
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| Files: |  polymers-14-00804.pdf (3,36 MB)
MD5: FC3C672F25B02D6B6A21A6EC07072D71
 https://www.mdpi.com/2073-4360/14/4/804
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| Language: | English |
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| Work type: | Article |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | FS - Faculty of Mechanical Engineering
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| Abstract: | 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. |
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| Keywords: | poly(4-vinylpyridine), poly(N-methyl-4-vinylpyridinium iodide), quaternization, solvatochromism, preferential solvation, optical energy gap |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Submitted for review: | 27.01.2022 |
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| Article acceptance date: | 17.02.2022 |
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| Publication date: | 19.02.2022 |
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| Publisher: | MDPI AG |
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| Year of publishing: | 2022 |
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| Number of pages: | 17 str. |
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| Numbering: | Vol. 14, iss. 4 (804) |
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| PID: | 20.500.12556/DKUM-92257  |
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| UDC: | 543.2 |
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| ISSN on article: | 2073-4360 |
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| COBISS.SI-ID: | 106889731 |
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| DOI: | 10.3390/polym14040804 |
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| Copyright: | © 2022 by the authors |
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| Publication date in DKUM: | 26.03.2025 |
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| Views: | 146 |
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| Downloads: | 12 |
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| Metadata: |    |
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| Categories: | Misc.
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