Single Crystal 133Cs NMR Study of Cs+(15-Crown-5)2I-

Bulletin of the Korean chemical society

Tae Ho Kim¹  Jineun Kim¹  Yong Woon Shin¹  Kang Yeol Lee¹ 

关键词: Crown ether;    Cesium;    NMR;    DANTE;    Hole burning;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

Cesium-133 NMR spectra of a single crystal of tetragonal Cs⁺(15-Crown-5)₂I^- were obtained as a function of crystal orientation in an applied magnetic field of 9.40T and analyzed to provide the magnitudes and orientations of the ¹³³Cs chemical shift and quadrupolar tensors for two magnetically nonequivalent and symmetry related sites. Chemical shift tensor components and parameters of quadrupolar interactions are obtained as �?11 = 46 (1), �?22 = 60 (1), �?33 = -30 (1) ppm, quadrupole coupling constant QCC = 581(1) kHz, and asymmetry parameter �? = 0.481(1), respectively. The nonaxially symmetric NMR parameters imply that the local environment of the cesium nuclei is nonaxially symmetric. The DANTE experiment burned holes in the ¹³³Cs NMR line of the title compound. The hole burning of the single crystal and powder 133Cs NMR lines showed that the NMR lines are not homogeneously broadened.

【 授权许可】

Unknown