Indirect 1H NMR characterization of H2@C60 nitroxide derivatives and their nuclear spin relaxation

被引：14

作者：

Li, Yongjun ^{[1
]}

Lei, Xuegong ^{[1
]}

Li, Xia ^{[1
]}

Lawler, Ronald G. ^{[2
]}

Murata, Yasujiro ^{[3
]}

Komatsu, Koichi ^{[4
]}

Turro, Nicholas J. ^{[1
]}

机构：

[1] Columbia Univ, Dept Chem, New York, NY 10027 USA

[2] Brown Univ, Dept Chem, Providence, RI 02912 USA

[3] Kyoto Univ, Inst Chem Res, Kyoto 6110011, Japan

[4] Fukui Univ Technol, Dept Environm & Biol Chem, Fukui 9108505, Japan

来源：

CHEMICAL COMMUNICATIONS | 2011年 / 47卷 / 46期

基金：

美国国家科学基金会;

关键词：

POLARIZATION; REDUCTION; RESONANCE; RADICALS; EPR;

D O I：

10.1039/c1cc15149e

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

H-1 NMR of two H-2@C-60 nitroxide derivatives has been characterized indirectly by reducing to their corresponding hydroxylamines. Nuclear spin relaxation of the endohedral H-2 and external protons of the H-2@C-60 nitroxide and its corresponding hydroxylamine were measured and analyzed. The observed spectra are consistent with negligible scalar coupling between the unpaired electron and the endo-H-2. An unexpectedly large bimolecular relaxivity induced in the hydroxylamine by the corresponding nitroxide can be explained by rapid hydrogen atom transfer between the two species.

引用

页码：12527 / 12529

页数：3

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