Magnetic field and orientation dependence of solid-state CIDNP

Denis V. Sosnovsky, Nikita N. Lukzen, Hans Martin Vieth, Gunnar Jeschke, Daniel Gräsing, Pavlo Bielytskyi, Jörg Matysik, Konstantin L. Ivanov

Результат исследования: Научные публикации в периодических изданияхстатья

3 Цитирования (Scopus)

Аннотация

The magnetic field dependence of Chemically Induced Dynamic Nuclear Polarization (CIDNP) in solid-state systems is analyzed theoretically with the aim to explain the puzzling sign change of polarization found at low fields [D. Gräsing et al., Sci. Rep. 7, 12111 (2017)]. We exploit the analysis of polarization in terms of level crossings and level anti-crossings trying to identify the positions of features in the CIDNP field dependence with specific crossings between spin energy levels of the radical pair. Theoretical treatment of solid-state CIDNP reveals a strong orientation dependence of polarization due to the spin dynamics conditioned by anisotropic spin interactions. Specifically, different anisotropic CIDNP mechanisms become active at different magnetic fields and different molecular orientations. Consequently, the field dependence and orientation dependence of polarization need to be analyzed together in order to rationalize experimental observations. By considering both magnetic field and orientation dependence of CIDNP, we are able to explain the previously measured CIDNP field dependence in photosynthetic reaction centers and to obtain a good qualitative agreement between the experimental observations and theoretical results.

Язык оригиналаанглийский
Номер статьи094105
Число страниц10
ЖурналJournal of Chemical Physics
Том150
Номер выпуска9
DOI
СостояниеОпубликовано - 7 мар 2019

Fingerprint Подробные сведения о темах исследования «Magnetic field and orientation dependence of solid-state CIDNP». Вместе они формируют уникальный семантический отпечаток (fingerprint).

Цитировать