Isolated Spin-7/2 Species of Gadolinium (III) Chelate Complexes on the Surface of 5-nm Diamond Particles
Электронный научный архив УРФУ
Информация об архиве | Просмотр оригинала| Поле | Значение | |
| Заглавие |
Isolated Spin-7/2 Species of Gadolinium (III) Chelate Complexes on the Surface of 5-nm Diamond Particles
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| Автор |
Osipov, V. Y.
Boukhvalov, D. W. Takai, K. |
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| Тематика |
DETONATION NANODIAMONDS
ELECTRON PARAMAGNETIC RESONANCE GADOLINIUM MAGNETIZATION PARAMAGNETISM SURFACE FUNCTIONALIZATION |
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| Описание |
The magnetic characteristics of a system of triply charged gadolinium ions Gd3+ chelated with carboxyls on the surface of detonation nanodiamond (DND) particles have been studied. Gd3+ ions demonstrate almost perfect spin (S = 7/2) paramagnetism with negligible antiferromagnetic interaction between spins (Weiss temperature about −0.35 K) for a wide range of concentrations up to ~18 ions per 5 nm particle. The study of the concentration dependence of the electron paramagnetic resonance signal for DND intrinsic defects with spin ½ (g = 2.0027) shows that Gd3+ ions are located on average at a distance of no more than 1.4 nm from shallow subsurface defects with spin 1/2. At the same time, they are located (according to density functional theory calculations) at a distance of about or at least 0.28 nm from the particle surface. Magnetic studies also confirm the isolated nature of the gadolinium chelate complexes on the surface of DND particles. DND particles turn out to be an optimal carrier for high-spin 4f- ions (gadolinium) in a highly concentrated isolated state. This property makes DND-Gd particles a candidate for the role of a contrast agent for magnetic resonance imaging. © 2023 by the authors.
Japan Society for the Promotion of Science, KAKEN: L17526; Ministry of Education and Science of the Russian Federation, Minobrnauka: FEUZ-2023-0013; Nanjing University of Aeronautics and Astronautics, NUAA; Ioffe Institute: 0040-2019-0013 V.Y.O. acknowledges the support from Ioffe Institute (project no. 0040-2019-0013). D.W.B. acknowledges the support by the Ministry of Science and Higher Education of the Russian Federation (through the basic part of the government mandate, Project No. FEUZ-2023-0013). The simulations have been supported by the High Performance Computing Platform of Nanjing University of Aeronautics and Astronautics. V.Y.O. acknowledges financial support from the Japan Society for the Promotion of Science (JSPS Fellowship no. L17526). |
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| Дата |
2024-04-05T16:27:41Z
2024-04-05T16:27:41Z 2023 |
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| Тип |
Article
Journal article (info:eu-repo/semantics/article) |info:eu-repo/semantics/publishedVersion |
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| Идентификатор |
Osipov, VY, Boukhvalov, DW & Takai, K 2023, 'Isolated Spin-7/2 Species of Gadolinium (III) Chelate Complexes on the Surface of 5-nm Diamond Particles', Nanomaterials, Том. 13, № 13, 1995. https://doi.org/10.3390/nano13131995
Osipov, V. Y., Boukhvalov, D. W., & Takai, K. (2023). Isolated Spin-7/2 Species of Gadolinium (III) Chelate Complexes on the Surface of 5-nm Diamond Particles. Nanomaterials, 13(13), [1995]. https://doi.org/10.3390/nano13131995 2079-4991 Final All Open Access, Gold, Green https://www.scopus.com/inward/record.uri?eid=2-s2.0-85164726612&doi=10.3390%2fnano13131995&partnerID=40&md5=ba00441b2aab07632f02c656774b4c6f https://www.mdpi.com/2079-4991/13/13/1995/pdf?version=1688350632 http://elar.urfu.ru/handle/10995/130635 10.3390/nano13131995 85164726612 001030905700001 |
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| Язык |
en
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| Права |
Open access (info:eu-repo/semantics/openAccess)
cc-by https://creativecommons.org/licenses/by/4.0/ |
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| Формат |
application/pdf
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| Издатель |
Multidisciplinary Digital Publishing Institute (MDPI)
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| Источник |
Nanomaterials
Nanomaterials |
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