A. E. Obukhov
Moscow Power Engineering Institute (technical university), Russia, Moscow

The physical principles of application spectroscopy of the nuclear magnetic resonance and luminescence for the studying of the structure and superthin electrone – nuclear interaction in the different complexes of molecules and with paramagnetic ions of lantanide

The NMR 13C and 1H spectra and parameters spectra a luminescence ion europium of Ln(fod)3 and Ln(dpm)3 (where paramagnetic of ions of lantanide Ln3+ = Pr, Sm, Dy, Ho, Er, Eu, Yb, and substrates = 1-, 2-, 3-pic and 3,5-, 2,4,5-, -lut, and [1-4]azafluorene) in CDCl3 and CCl4 were observed at 77 and 300K and lanthanide-induced shift for all of atoms of protons and of carbons, including those of the chelate, were calculated using the complete dipolar-shift equation. If is observed the deviation of symmetry adduct from axial in this case, to is accompanied by increase of the factor are the factors of the coordination: theory - experiment up to RGAM = 0,2 - 0,5; 2). If at an estimation of a hypothesis about structure of a complex the LSR-substrate the basic criteria are carried out some: 1) presence of axial symmetry, 2) stechiometry is 1:1, 3) are authentically divided the dipole and constant superthin interaction are the R-factors of the coordination of theory and of experiment sharply is reduced up to RGAM = 0,001 - 0,015; 3). On sets dipolare lanthanide induced shifts of resonant frequencies of nucleus of a substratum in spectra NMR 13C and 1H is established, that the designed length of coordination communication an ion lanthanide - donor-atoms of a substratum in a solution is in a range dln-Nsubsr = 2,75 - 2,53 Ǻ and on dln-Nsubsr = 0,08 - 0,3 Ǻ more, than for the same adduct LSR-substrate in a crystal.
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