Parahydrogen allows ultrasensitive indirect NMR detection of catalytic hydrogen complexes
AS Kiryutin, G Sauer, AV Yurkovskaya… - The Journal of …, 2017 - ACS Publications
The 1H NMR signal of dissolved molecular hydrogen enriched in parahydrogen (p-H2)
exhibits in the presence of an organometallic hydrogenation catalyst an unusual, partially
negative line shape (PNL). It results from a strongly enhanced two-spin order connected to
the population of the T 0 level of orthohydrogen (o-H2). This two-spin order is made visible
by a slow asymmetric exchange process between free hydrogen and a transient catalyst-
hydrogen complex. By Only Parahydrogen Spectroscopy (OPSY) it is possible to selectively …
exhibits in the presence of an organometallic hydrogenation catalyst an unusual, partially
negative line shape (PNL). It results from a strongly enhanced two-spin order connected to
the population of the T 0 level of orthohydrogen (o-H2). This two-spin order is made visible
by a slow asymmetric exchange process between free hydrogen and a transient catalyst-
hydrogen complex. By Only Parahydrogen Spectroscopy (OPSY) it is possible to selectively …
[引用][C] Parahydrogen Allows Ultrasensitive Indirect NMR Detection of Catalytic Hydrogen Complexes
S Grit, L Hans-Heinrich, B Gerd - 2017
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