caa a22 4500 378862812 CHVBK 20180305123350.0 cr unu---uuuuu 161128e20031201xx s 000 0 eng 10.1524/zpch.217.12.1641.20479 doi (NATIONALLICENCE)gruyter-10.1524/zpch.217.12.1641.20479 2D NMR Nutation Analysis of Non-Thermal Polarization of Coupled Multi-Spin Systems [Elektronische Daten] [K. L. Ivanov, K. Miesel, Hans-Martin Vieth, A. V. Yurkovskaya, R. Z. Sagdeev] A new, convenient method of analyzing the spin polarization of a non-equilibrium system of N coupled nuclei is described and applied to photo-reactions exhibiting chemically induced dynamic nuclear polarization (CIDNP). It is based on the Fourier analysis of the variation of NMR line intensities as a function of the radio frequency excitation pulse length. A relationship between the spectral components at various harmonic order and the alignment in the spin multiplet is established. In application to the Norrish type I photolysis of cyclodecanone we demonstrate that at low magnetic field the rate determining step in the reaction kinetics depends on the mutual orientation of at least four pairs of non-equivalent spins. © 2003 Oldenbourg Wissenschaftsverlag GmbH Thermodynamics & statistical physics nationallicence Laboratory techniques, experiments nationallicence Physical chemistry nationallicence Ivanov K. L. aut Miesel K. aut Vieth Hans-Martin aut Yurkovskaya A. V. aut Sagdeev R. Z. aut Zeitschrift für Physikalische Chemie/International journal of research in physical chemistry and chemical physics Oldenbourg Wissenschaftsverlag GmbH 217/12/2003(2003-12-01), 1641-1659 0044-3336 217:12/2003<1641 2003 217 zpch https://doi.org/10.1524/zpch.217.12.1641.20479 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1524/zpch.217.12.1641.20479 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ivanov K. L. aut NATIONALLICENCE 700 1- Miesel K. aut NATIONALLICENCE 700 1- Vieth Hans-Martin aut NATIONALLICENCE 700 1- Yurkovskaya A. V. aut NATIONALLICENCE 700 1- Sagdeev R. Z. aut NATIONALLICENCE 773 0- Zeitschrift für Physikalische Chemie/International journal of research in physical chemistry and chemical physics Oldenbourg Wissenschaftsverlag GmbH 217/12/2003(2003-12-01), 1641-1659 0044-3336 217:12/2003<1641 2003 217 zpch CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter