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Showing 1 to 8 of 8 for “"parahydrogen"”.
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Cobalt catalysts towards parahydrogen induced polarization
… the use of a spin isomer of hydrogen gas termed parahydrogen (p-H2). Parahydrogen has been used in conjunction with rhodium and iridium homogeneous catalysts in the field of Parahydrogen Induced Polarization (PHIP) to yield large signal enhancements over the standard signals traditionally …
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CCC pincer iron complexes: synthesis, reactivity and parahydrogen induced polarization
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-08-01
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Nuclear spin coherence times of HD trapped in solid parahydrogen matrices
Solid parahydrogen is an appealing host material for nuclear-spin spectroscopy and precision measurements, providing a weakly interacting environment for embedded molecules, and a high degree of magnetic purity. While previous studies have demonstrated the potential of doped solid-parahydrogen …
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Spin coherence and optical properties of alkali-metal atoms in solid parahydrogen
… of trapped alkali atoms in a cryogenic parahydrogen solid as a candidate system for the aforementioned applications. In this experiment, we have studied the relevant properties of Rb-85, Rb-87, Cs-133, and K-39 trapped in the solid.First we discuss experiments where we studied optical …
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NMR/MRI SIGNAL ENHANCEMENT BY REVERSIBLE EXCHANGE (SABRE) AND HETEROGENEOUS SABRE (HET-SABRE)
… Exchange, or SABRE, is a type of PHIP (ParaHydrogen Induced Polarization) pioneered by Duckett, Green, and co-workers where an organometallic catalyst is used to co-locate parahydrogen (pH2) and a molecular substrate to be hyperpolarized. Like traditional PHIP, SABRE is of interest …
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The catalytic hydrogenation of carbon-carbon and carbon-nitrogen multiple bonds by a cobalt(I) complex
… Mechanistic studies based on multinuclear and parahydrogen (p-H2) induced polarization (PHIP) transfer NMR reveled a Co(I)/Co(III) redox process was operative. Based on the mechanistic studies of the olefin hydrogenation studies, the hydrogenation utility of (MesCCC)Co(N2)(PPh3) was extended …
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NOVEL EXPERIMENTAL APPROACHES AND THEORETICAL MODELS FOR IMPROVING SENSITIVITY AND INFORMATION CONTENT OF NMR AND MRI SPECTROSCOPY
… sample prior to performing the NMR experiments. Parahydrogen-induced polarization (PHIP) is an emerging field in enhancing the sensitivity in NMR experiments and may play an important role in MRI studies. Within this field a very recent phenomena of signal amplification by reversible exchange …
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Making Nuclear Magnetic Hyperpolarization Practical through Storage in Disconnected Eigenstates
… Hyperpolarization is accomplished by bubbling parahydrogen through a solution containing the diazirine and an iridium catalyst. Due to the chemical inequivalence of the 15N of the diazirine, hyperpolarization of longitudinal magnetization and singlet character could be observed by transfer to …