An NMR study of He2 inside C70

被引：73

作者：

Khong, A

Jiménez-Vázquez, HA

Saunders, M

Cross, RJ

Laskin, J

Peres, T

Lifshitz, C

Strongin, R

Smith, AB

机构：

[1] Yale Univ, Dept Chem, New Haven, CT 06520 USA

[2] Hebrew Univ Jerusalem, Dept Phys Chem, IL-91904 Jerusalem, Israel

[3] Hebrew Univ Jerusalem, Farkas Ctr Light Induced Proc, IL-91904 Jerusalem, Israel

[4] Univ Penn, Dept Chem, Philadelphia, PA 19104 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 1998年 / 120卷 / 25期

关键词：

D O I：

10.1021/ja980142h

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A peak in the helium NMR spectrum of He-3 labeled C-70 is assigned to molecules containing two helium atoms. The concentration of the dihelium species is about 1/20th that of molecules containing a single helium, and the helium shift of this new species is 0.014 ppm (5.6 Hz) downfield from the resonance for molecules containing one helium. Mass spectrometry confirms the presence of dilabeled molecules. A Hirsch-Bingel transformation of the C-70 to a malonate diethyl ester increases the chemical shift difference between the mono- and dihelium species.

引用

页码：6380 / 6383

页数：4