title: Dipolar induced para-hydrogen-induced polarization.
abstract: Analytical expressions for the signal enhancement in solid-state PHIP NMR spectroscopy mediated by homonuclear dipolar interactions and single pulse or spin-echo excitation are developed and simulated numerically. It is shown that an efficient enhancement of the proton NMR signal in solid-state NMR studies of chemisorbed hydrogen on surfaces is possible. Employing typical reaction efficacy, enhancement-factors of ca. 30-40 can be expected both under ALTADENA and under PASADENA conditions. This result has important consequences for the practical application of the method, since it potentially allows the design of an in-situ flow setup, where the para-hydrogen is adsorbed and desorbed from catalyst surfaces inside the NMR magnet.
authors.affiliation: Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Alarich-Weiss-Str. 8, D-64287 Darmstadt, Germany. Electronic address: gerd.buntkowsky@chemie.tu-darmstadt.de.
authors.forename: Gerd
authors.initials: G
authors.lastname: Buntkowsky
authors.affiliation: Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Alarich-Weiss-Str. 8, D-64287 Darmstadt, Germany.
authors.forename: Torsten
authors.initials: T
authors.lastname: Gutmann
authors.affiliation: International Tomography Center, Institutskaya 3a, Novosibirsk 630090, Russia.
authors.forename: Marina V
authors.initials: MV
authors.lastname: Petrova
authors.affiliation: International Tomography Center, Institutskaya 3a, Novosibirsk 630090, Russia; Novosibirsk State University, Pirogova 2, Novosibirsk 630090, Russia.
authors.forename: Konstantin L
authors.initials: KL
authors.lastname: Ivanov
authors.affiliation: Leibniz-Institute for Neurobiology, Magdeburg, Germany.
authors.forename: Ute
authors.initials: U
authors.lastname: Bommerich
authors.affiliation: Dept. of Biometry and Medical Informatics, Otto-von-Guericke University of Magdeburg, Leipziger Str. 44, 39120 Magdeburg, Germany.
authors.forename: Markus
authors.initials: M
authors.lastname: Plaumann
authors.affiliation: Dept. of Biometry and Medical Informatics, Otto-von-Guericke University of Magdeburg, Leipziger Str. 44, 39120 Magdeburg, Germany.
authors.forename: Johannes
authors.initials: J
authors.lastname: Bernarding
keywords: Hyperpolarization; Para-hydrogen; Solid State NMR