Dynamics of Polymer Membrane Swelling in Aqueous Suspension of Amino-Acids with Different Isotopic Composition; Photoluminescence Spectroscopy Experiments
| Autor: | Elena V. Bondarchuk, Nikolai F. Bunkin, Maria A. Okuneva, Valeriy A. Kozlov, Igor F. Turkanov, Oleg V. Ovchinnikov, Valery G. Gryaznov, Polina N. Bolotskova, Oleg P. Smoliy, Nikita V. Penkov |
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| Rok vydání: | 2021 |
| Předmět: |
Photoluminescence
Materials science quenching of luminescence Polymers and Plastics amino-acids Synthetic membrane binary cells polymer swelling Organic chemistry ζ-potential Article chemistry.chemical_compound QD241-441 Dynamic light scattering Nafion chemistry.chemical_classification Quenching (fluorescence) dynamic light scattering General Chemistry Polymer isotopic effects Membrane chemistry Chemical engineering photoluminescence spectroscopy logic gates Luminescence polymer membranes |
| Zdroj: | Polymers, Vol 13, Iss 2635, p 2635 (2021) Polymers |
| ISSN: | 2073-4360 |
| DOI: | 10.3390/polym13162635 |
| Popis: | In photoluminescence spectroscopy experiments, the interaction mode of the polymer membrane Nafion with various amino-acids was studied. The experiments were performed with physiological NaCl solutions prepared in an ordinary water (the deuterium content is 157 ± 1 ppm) and also in deuterium-depleted water (the deuterium content is ≤1 ppm). These studies were motivated by the fact that when Nafion swells in ordinary water, the polymer fibers are effectively “unwound” into the liquid bulk, while in the case of deuterium-depleted water, the unwinding effect is missing. In addition, polymer fibers, unwound into the liquid bulk, are similar to the extracellular matrix (glycocalyx) on the cell membrane surface. It is of interest to clarify the role of unwound fibers in the interaction of amino-acids with the polymer membrane surface. It turned out that the interaction of amino-acids with the membrane surface gives rise to the effects of quenching luminescence from the luminescence centers. We first observed various dynamic regimes arising upon swelling the Nafion membrane in amino-acid suspension with various isotopic content, including triggering effects, which is similar to the processes in the logical gates of computers. |
| Databáze: | OpenAIRE |
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