期刊
APPLIED MAGNETIC RESONANCE
卷 39, 期 4, 页码 329-345出版社
SPRINGER WIEN
DOI: 10.1007/s00723-010-0161-9
关键词
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资金
- DANA foundation
- Bi-National Science Foundation (BSF) [2006118]
- German Israel Foundation (GIF) [2131-1586.5/2006]
- Abisch-Frenkel Foundation
- Center for Complexity Science [GR2007-053]
- Tchorz fund
- Speijer inheritance fund
- Goldin-Savad inheritance fund
An apparatus for the production of hydrogen for hydrogenation-induced polarization studies was developed. The apparatus provides hydrogen gas from a solid source, thereby simplifying the requirement for siting of the apparatus. The produced hydrogen can be either isotopically enriched (with deuterium) or spin-enriched (with parahydrogen). These specialty gases were produced at small predetermined quantities and ambient pressure. The properties of the hydrogen mixtures were characterized by gas-phase nuclear magnetic resonance. The T (1) of the hydrogen mixtures (3.7 ms) was not affected by para-enrichment. The line width of the hydrogen signal in the para-enriched mixture was 34% larger. The reaction of ethyl propiolate hydrogenation served to evaluate the performance in terms of the ability to create hyperpolarized states. In this reaction, a polarization of 11.2% was measured for protons. Consecutive alkene hydrogenations as well as hydrogenations of the catalyst ligand resulted in additional hyperpolarized signals which were systematically assigned.
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