Proton NMR of isomorphous paramagnetic and diamagnetic monohydrates MeSO4.1 H2O Me = Mn2+, Fe2+, Ni2+ AND Mg2+

Autor:	D. Olčák, M. Rákoš, J. Murín, K. Jelšovská, J. Oravcová
Rok vydání:	1981
Předmět:	Materials science Condensed matter physics General Physics and Astronomy Nuclear magnetic resonance spectroscopy Ion Magnetic field Condensed Matter::Materials Science Paramagnetism Proton NMR Physical chemistry Molecule Diamagnetism Condensed Matter::Strongly Correlated Electrons Hydrate
Zdroj:	Czechoslovak Journal of Physics. 31:313-323
ISSN:	1572-9486 0011-4626
DOI:	10.1007/bf01604515
Popis:	Nuclear magnetic resonance of protons of crystallization water in isomorphous paramagnetic and diamagnetic monohydrates MeSO4. 1 H2O with Me = Mn2+, Fe2+, Ni2+ and Mg2+ is studied in the present paper. Proton NMR spectra in paramagnetic hydrates are asymmetric and their second moments, M2, depend linearly on the square of the induction of the external magnetic field B0. NMR spectrum of diamagnetic hydrate MgSO4. 1 H2O is symmetric and its shape and the second moment do not change with B0. The parameters M20 andK which characterize nuclear dipole-dipole interaction of protons and interaction of protons and paramagnetic ions, respectively, are derived from experimentally obtained dependences M2 vs B02 and on the other hand, they are calculated by means of crystallographic data for substances studied. Calculations were realized in approximation where two nearest neighbour ions Me2+ to each water molecule are considered. The influence of the demagnetizing magnetic field of the sample was neglected.
Databáze:	OpenAIRE
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