4d²電子系에 對한 NMR 化學的移動에 關한 硏究 = The Study on the NMR Chemical Shift for a 4d²System

다국어 초록 (Multilingual Abstract)

The NMR chemical shift arising from 4d electron orbital angular momentum and 4d electron spin dipolar-nuclear spin angular momentum interactions for a 4d²system in a strong crystal field environment of octahedral symmetry has been investigated when the four fold axis is taken as the quantization axis.
The NMR resualts are compared with the multipolar shift at various R-values and we find that the exact resualts are in agreement with the multipolar shift when R≥0.20nm.
We also separate the NMR shift into the contribution of the 1/R5 and 1/R7 terms. It is found that the contribution of the 1/R5 term to the NMR shift is more dominant than the contribution of the 1/R7.
Temperuture dependence analysis shows that the 1/T²term is the dominant contribution to the NMR shift for a 4d²system but the contribution of the 1/T term may not be negligible.
The similar results are obtained for a 4d¹system from the temperature dependence analysis.