关键词: 顺磁共振, 稀土金属络合物, 弛豫时间, 丙氨酸, 镱络合物, 镨络合物, 铕络合物, 顺磁诱导位移

A new structure analysis method for lanthanide complexes was proposed, that is, none paramagnetic shift tri-lanthanide mixture method. It was found that the paramagnetic induced shift coul be cancelled by mixing three kinds of paramagnetic lanthanide ions in appropriate proportion. As a result, the chelating sites would be seen simplely from the half widths and the relative distances between lanthanide ion and the ligand nucleus could be calculated from the relaxation time (T1) or the half width. Care should be addressed that the analysis method is suitable for the systems in which intramolecular arrangements and intermolecular ligand exchanges are relatively fast on NMR time scale used.

Key words: PARAMAGNETIC RESONANCE, RARE EARTH METAL COMPLEX, RELAXATION TIME, ALANINE, YTTERBIUM COMPLEX, PRASEODYMIUM COMPLEX, EUROPIUM COMPLEX