Determination of the shape and dimensions of the polymer molecules in solutions using diffusional NMR relaxation
- Authors: Ivanova V.A.1, Maksimychev A.V.2, Men’shikov P.L.1,3, Pashutin A.R.1, Perepukhov A.M.1,4, Rozhkov A.N.5, Tsar’kov M.V.1
-
Affiliations:
- Moscow Institute of Physics and Technology
- Moscow Institute of Physics and Technologya
- National Research Center "Kurchatov Institute"
- Zelinsky Institute of Organic Chemistry of the Russian Academy of Sciences
- Ishlinsky Institute for Problems in Mechanics, of the Russian Academy of Sciences
- Issue: No 2 (2024)
- Pages: 135-138
- Section: Articles
- URL: https://vietnamjournal.ru/1024-7084/article/view/672107
- DOI: https://doi.org/10.31857/S1024708424020127
- EDN: https://elibrary.ru/risuuk
- ID: 672107
Cite item
Abstract
A new method of determining the dimensions and shapes of polymer molecules in solutions is proposed and verified in experiments. The method is based on the measurements of the relaxation of the transverse magnetization intensity of nuclei. It is established that the decaying signal of the spin echo from elongated molecules contains two terms exponentially decaying with time, which correspond to two diffusion coefficients differing by a factor of about two. The signal from molecules with a near-spherical shape contain only one exponent.
Full Text

About the authors
V. A. Ivanova
Moscow Institute of Physics and Technology
Email: valeriya.ivanova@phystech.edu
Russian Federation, Dolgoprudny, Moscow Region, 141701 Russia
A. V. Maksimychev
Moscow Institute of Physics and Technologya
Email: maksimychev.av@mipt.ru
Russian Federation, Dolgoprudny, Moscow Region, 141701 Russi
P. L. Men’shikov
Moscow Institute of Physics and Technology; National Research Center "Kurchatov Institute"
Email: menshikov2005@mail.ru
Russian Federation, Dolgoprudny, Moscow Region, 141701 Russia; Moscow, 123182 Russia
A. R. Pashutin
Moscow Institute of Physics and Technology
Email: nituhsap@mail.ru
Russian Federation, Dolgoprudny, Moscow Region, 141701 Russia
A. M. Perepukhov
Moscow Institute of Physics and Technology; Zelinsky Institute of Organic Chemistry of the Russian Academy of Sciences
Email: aleksandr-iv@mail.ru
Russian Federation, Dolgoprudny, Moscow Region, 141701; Moscow
A. N. Rozhkov
Ishlinsky Institute for Problems in Mechanics, of the Russian Academy of Sciences
Email: rozhkov@ipmnet.ru
Russian Federation, Moscow, 119526 Russia
M. V. Tsar’kov
Moscow Institute of Physics and Technology
Author for correspondence.
Email: m.carkov@phystech.edu
Russian Federation, Dolgoprudny, Moscow Region, 141701 Russia
References
- Гросберг А.Ю., Хохлов А.Р. Статистическая физика макромолекул. М.: Наука, 1989. 343 с.
- Лэмб Г. Гидродинамика. М.-Л.: Гостехиздат, 1947. 928 с.
- Palmin V., Mukhin A., Ivanova V., Perepukhov A., Nozik A. Automated component analysis in DOSY NMR using information criteria // J. Magn. Res. 2023. V. 355. Article 107541.
- Сликтер Ч. Основы магнитного резонанса. М.: Мир, 1981. 448 с.
- Чижик В.И. Ядерная магнитная релаксация. СПб.: Изд-во Санкт-Петербург. ун-та, 2000. 385 с.
- Carr H. Y., Purcell E. M. Effects of diffusion on free precession in nuclear magnetic resonance experiments // Phys. Rev. 1954. V. 94. P. 630–638.
Supplementary files
