期刊
ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS
卷 226, 期 11-12, 页码 1315-1342出版社
WALTER DE GRUYTER GMBH
DOI: 10.1524/zpch.2012.0269
关键词
Spin Hyperpolarization; Para-Hydrogen; PHIP; Magnetic Field Dependence
资金
- Russian Fund for Basic Research (RFBR) [11-03-00356, 11-03-00296]
- Program of the Division of Chemistry and Material Science RAS [5.1.1]
- Program P-220 of the Russian Government [11.G34.31.0045]
- Research Group Linkage Program of the Alexander von Humboldt Foundation
We have obtained analytical solutions for Para-Hydrogen Induced Polarization (PHIP) for several types of coupled spin systems, namely, for AB-, ABX-, AA'A ''- and A(2)B-systems. Scalar spin-spin interactions were considered the factor, that determines the PHIP spectral pattern; it is the variation of the spin coupling regime (from strong coupling at low field to weak coupling at high field), which is responsible for the PHIP magnetic field dependence. The field dependence of polarization was considered in detail, general peculiarities of PHIP were found, PHIP patterns were calculated for the systems mentioned. Special attention was paid to the effects of field switching on PHIP.
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