Tag Archive for Shmyreva

J. Chem. Phys., 2016, 144, 224201

A.A. Shmyreva, M. Safdari, I. Furó, S.V. Dvinskikh

“NMR longitudinal relaxation enhancement in metal halides by heteronuclear polarization exchange during magic-angle spinning”

J. Chem. Phys., 2016, 144, 224201

Orders of magnitude decrease of 207Pb and 199Hg NMR longitudinal relaxation times T 1 upon magic-angle-spinning (MAS) are observed and systematically investigated in solid lead and mercury halides MeX2 (Me = Pb, Hg and X = Cl, Br, I). In lead( ii) halides, the most dramatic decrease of T 1 relative to that in a static sample is in PbI2, while it is smaller but still significant in PbBr2, and not detectable in PbCl2. The effect is magnetic-field dependent but independent of the spinning speed in the range 200–15 000 Hz. The observed relaxation enhancement is explained by laboratory-frame heteronuclear polarization exchange due to crossing between energy levels of spin-1/2 metal nuclei and adjacent quadrupolar-spin halogen nuclei. The enhancement effect is also present in lead-containing organometal halide perovskites. Our results demonstrate that in affected samples, it is the relaxation data recorded under non-spinning conditions that characterize the local properties at the metal sites. A practical advantage of fast relaxation at slow MAS is that spectral shapes with orientational chemical shift anisotropy information well retained can be acquired within a shorter experimental time.

Spinus 2015, A. Shmyreva

Anna Shmyreva has presented a report “Nuclear magnetic resonance study of Ni nanoparticles” at the conference Spinus 2015. Video report you can find here (language: Ru).

Dr. Marco Braun

Dr. Marco Braun from “NMR Service GmbH”, Germany, has arrived for diagnosing and tuning our Tecmag Redstone spectrometer.

Spinus 2013

Our contribution to the 10th Anniversary of the Winter School conference Spinus 2013:

  1. П.М. Толстой, С.А. Пылаева, Е.Ю. Тупикина, Г.С. Денисов, Д. Себастиани, К. Аллолио, Б. Кёппе, Х.-Х. Лимбах, «Динамика сольватной оболочки и протонный таутомеризм в комплексах с сильной водородной связью»
  2. P.M. Tolstoy, S.A. Pylaeva, E.Yu. Tupikina, G.S. Denisov, D. Sebastiani, C. Allolio, B. Koeppe , H.-H. Limbach “Dynamics of solvation shell and proton tautomerism in complexes with strong hydrogen bond”;

  3. С.М. Сухаржевский, «Принципы ЭПР-спектроскопии»
  4. S.M. Sukharzhevskii “Principles of EPR spectroscopy”;

  5. А.А. Шмырева, «Ядерный магнитный резонанс в магнитоупорядоченных материалах»
  6. A.A. Shmyreva “NMR in magnetically ordered materials”;

  7. А.В. Выводцева, И. Рыков, В.И. Чижик, М.Г. Шеляпина, «Подвижность водорода в многокомпонентных сплавах переходных металлов»
  8. A.V. Vyvodtceva, I. Rykov, V.I. Chizhik, M.G. Shelyapina “Mobility of hydrogen in multicomponent alloys of transition metals”;

  9. А.Ю. Култаева, С.М. Сухаржевский, «Исследование палеонтологических биообъектов методом ЭПР»
  10. A.Yu. Kultaeva, S.M. Sukharzhevskii “Paleontological study of biological objects by EPR”;

  11. С.А. Пылаева, Р.Е. Асфин, А.А. Гуринов, П.М. Толстой, Г.С. Денисов, «Исследование структуры смеси ацетона с трифторуксусной кислотой при различных концентрациях компонентов методами спектроскопии комбинационного рассеяния и ЯМР»
  12. S.A. Pylaeva, R.E. Asfin, A.A. Gurinov, P.M. Tolstoy, G.S. Denisov “Investigation of the structure of acetone mixture with trifluoroacetic acid at different concentrations of components by Raman spectroscopy and NMR”;

  13. С.О. Рабдано, А.В. Донец, «Микроструктура и подвижность в водных растворах аминокислот по данным ЯМР и квантовой химии»
  14. S.O. Rabdano, A.V. Donets “Microstructure and mobility of aminoacids in aqueous solutions by NMR and quantum chemistry”;

  15. Е.Ю. Тупикина, П.М. Толстой, Г.С. Денисов, «CH-группа как донор протона: структура и свойства комплексов с водородной связью»
  16. E.Yu. Tupikina, P.M. Tolstoy, G.S. Denisov «CH-group as a proton donor: structure and properties of complexes with hydrogen bonding”.
    Best poster award.


At the 3rd Russian-Mexican Workshop on Nanoparticles, Nanomaterials and Nanoprocessing our Ceter employees have presented the following oral presentations::

  • P. Tolstoy “Introduction to center for magnetic resonance at St Petersburg State University”;
  • A. Gurinov “NMR study of Lewis and Brønsted acidic centers of aluminated SBA-15 Silicas”;
  • E. Kurenkova “NQR/NMR studies in zero-field at Center for Magnetic Resonance”;
  • A. Shmyreva “Investigation of metal nanoparticles by the example of Co-59 NMR technic”;

and posters:

  • A. Kultaeva, S. Sukharzhevskii, A. Antipov “Study of hydroxyapatites structure by electron paramagnetic resonance”;
  • A. Vyvodtceva, M. Shelyapina, A. Privalov, F. Fujara, D. Fruchart “1H NMR study of hydrogen diffusion in the transition metal alloys lattice”.

Photos are in our gallery.

Later on collegues from Mexico have visited our Center.

RuMex-2013 excursion

Open Doors Day NMRCM-2013

During the 10th International Symposium NMRCM-2013 we successfully held an Open Doors Day.


Anna Shmyreva has got a certificate

Anna Shmyreva has completed the training in the University of São Paulo, Brazil, and got the certificate.