Zobrazeno 1 - 10
of 263
pro vyhledávání: '"Igor V. Koptyug"'
Autor:
Ivan A. Trofimov, Oleg G. Salnikov, Andrey N. Pravdivtsev, Henri de Maissin, Anna P. Yi, Eduard Y. Chekmenev, Jan-Bernd Hövener, Andreas B. Schmidt, Igor V. Koptyug
Publikováno v:
Communications Chemistry, Vol 7, Iss 1, Pp 1-9 (2024)
Abstract Radio Amplification by Stimulated Emission of Radiation (RASER) is a phenomenon observed during nuclear magnetic resonance (NMR) experiments with strongly negatively polarized systems. This phenomenon may be utilized for the production of ve
Externí odkaz:
https://doaj.org/article/d9e9bd5c2d03452e808d46bfae18c10d
Autor:
Nuwandi M. Ariyasingha, Shiraz Nantogma, Anna Samoilenko, Oleg G. Salnikov, Nikita V. Chukanov, Larisa M. Kovtunova, Igor V. Koptyug, Eduard Y. Chekmenev
Publikováno v:
Journal of Magnetic Resonance Open, Vol 16, Iss , Pp 100135- (2023)
Parahydrogen-Induced Polarization (PHIP) is NMR hyperpolarization technique that has matured from fundamental science to a biomedical tool for production of hyperpolarized MRI contrast agents. The spin order of nascent parahydrogen-derived protons ca
Externí odkaz:
https://doaj.org/article/d0225340981e44abaa99423182002616
Autor:
Anna V. Nartova, Ren I. Kvon, Larisa M. Kovtunova, Ivan V. Skovpin, Igor V. Koptyug, Valerii I. Bukhtiyarov
Publikováno v:
International Journal of Molecular Sciences, Vol 24, Iss 21, p 15643 (2023)
Immobilized [Ir(COD)Cl]2-Linker/TiO2 catalysts with linkers containing Py, P(Ph)2 and N(CH3)2 functional groups were prepared. The catalysts were tested via propene hydrogenation with parahydrogen in a temperature range from 40 °C to 120 °C which w
Externí odkaz:
https://doaj.org/article/d6c81d3def95424d95c4d15f92918a53
Autor:
Alexandra Svyatova, Vitaly P. Kozinenko, Nikita V. Chukanov, Dudari B. Burueva, Eduard Y. Chekmenev, Yu-Wen Chen, Dennis W. Hwang, Kirill V. Kovtunov, Igor V. Koptyug
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
Abstract Parahydrogen-induced polarization of 13C nuclei by side-arm hydrogenation (PHIP-SAH) for [1-13C]acetate and [1-13C]pyruvate esters with application of PH-INEPT-type pulse sequences for 1H to 13C polarization transfer is reported, and its eff
Externí odkaz:
https://doaj.org/article/2fcdf7748c404a658d390d7cb3f25b84
Autor:
Bryce E. Kidd, Max E. Gemeinhardt, Jamil A. Mashni, Jonathan L. Gesiorski, Liana B. Bales, Miranda N. Limbach, Roman V. Shchepin, Kirill V. Kovtunov, Igor V. Koptyug, Eduard Y. Chekmenev, Boyd M. Goodson
Publikováno v:
Molecules, Vol 28, Iss 3, p 1198 (2023)
The present work investigates the potential for enhancing the NMR signals of DNA nucleobases by parahydrogen-based hyperpolarization. Signal amplification by reversible exchange (SABRE) and SABRE in Shield Enables Alignment Transfer to Heteronuclei (
Externí odkaz:
https://doaj.org/article/1e13714edefe44779f75301d1727ca52
Publikováno v:
Symmetry, Vol 14, Iss 3, p 530 (2022)
It is well known that the association of parahydrogen (pH2) with an unsaturated molecule or a transient metalorganic complex can enhance the intensity of NMR signals; the effect is known as parahydrogen-induced polarization (PHIP). During recent deca
Externí odkaz:
https://doaj.org/article/55f2a2041d5b4e598b2373d2ef0b2e0b
Autor:
Nikita V. Chukanov, Oleg G. Salnikov, Roman V. Shchepin, Kirill V. Kovtunov, Igor V. Koptyug, Eduard Y. Chekmenev
Publikováno v:
ACS Omega, Vol 3, Iss 6, Pp 6673-6682 (2018)
Externí odkaz:
https://doaj.org/article/a94c02c2b6524c32abb448c37899ca05
Autor:
Alexander Parastaev, Valery Muravev, Elisabet Huertas Osta, Tobias F. Kimpel, Jérôme F. M. Simons, Arno J. F. van Hoof, Evgeny Uslamin, Long Zhang, Job J. C. Struijs, Dudari B. Burueva, Ekaterina V. Pokochueva, Kirill V. Kovtunov, Igor V. Koptyug, Ignacio J. Villar-Garcia, Carlos Escudero, Thomas Altantzis, Pei Liu, Armand Béché, Sara Bals, Nikolay Kosinov, Emiel J. M. Hensen
Publikováno v:
Nature Catalysis, 5(11), 1051-1060. Nature Publishing Group
A high dispersion of the active metal phase of transition metals on oxide supports is important when designing efficient heterogeneous catalysts. Besides nanoparticles, clusters and even single metal atoms can be attractive for a wide range of reacti
Autor:
Alexandra I. Trepakova, Ivan V. Skovpin, Nikita V. Chukanov, Oleg G. Salnikov, Eduard Y. Chekmenev, Andrey N. Pravdivtsev, Jan-Bernd Hövener, Igor V. Koptyug
Publikováno v:
The Journal of Physical Chemistry Letters. 13:10253-10260
Magnetic resonance imaging (MRI) provides unique information about the internal structure and function of living organisms in a non-invasive way. The use of conventional proton MRI for the observation of real-time metabolism is hampered by the domina
Autor:
Elizaveta S. Kononenko, Alexandra I. Svyatova, Ivan V. Skovpin, Larisa M. Kovtunova, Evgeny Yu. Gerasimov, Igor V. Koptyug
Publikováno v:
The Journal of Physical Chemistry C. 126:14914-14921