摘要
测定了 1 71 Yb2 +的静态和 MAS- NMR波谱 ,获得了 NMR基本参数 :化学位移 (δ)、屏蔽张量(δave-,δ∥ ,δ⊥ ) ,自旋晶格弛豫时间 (T1 ,T∥1 ,T⊥1 ) ,根据谱宽获得了自旋 -自旋弛豫时间 (T2 ) ,根据波谱形状 ,获得了中心离子局域对称性的信息。
The powder and magic- angle spinning (MAS) experiments on1 71 Yb in AYb I3 (A:K,Rb, Cs) are reported. The NMR parameters,such as the principal components of the chemical shielding tensor(δave-,δ∥ ,δ⊥ ) ,the parallel and perpendicular components of longitudinal times(T1 ,T∥ 1 ,T⊥ 1 ) are determined in solid state and the transverse relaxation time was ob- tained from the natural line width.The local symmetry of Yb was discussed according to the spectra shape.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
1996年第1期46-49,共4页
Chinese Journal of Inorganic Chemistry
基金
国家科委八五攀登计划基金
国家自然科学资金
国家教委留学回国科研资金资助
波谱与原子分子国家重点实验室基金资助项目
关键词
驰豫时间
屏蔽张量
镱
NMR
171Yb powder and magnic- angle spinning nuclear magnetic resonance relaxation time relaxation anisotropy chemical shielding tensor ytterbium compound AYb I3 (A:K,Rb,Cs) local symmetry of Yb
