Results 11 to 20 of about 736 (155)
Angew Chem Int Ed EnglRapid RASER MRI allows for image acquisition without RF excitation. Instead, a population inversion on the nuclear spins is generated by SABRE hyperpolarization, which allows for self‐excitation through the RASER approach. When the desired transverse magnetization is built‐up, conventional EPI encoding is triggered to record the image.
Lehmkuhl S +7 more
europepmc +2 more sources
High-purity solid parahydrogen [PDF]
Review of Scientific Instruments, 2021 Alkali atoms trapped in solid hydrogen matrices have demonstrated ultralong electron spin coherence times and are promising as quantum sensors. Their spin coherence is limited by magnetic noise from naturally occurring orthohydrogen molecules in the parahydrogen matrix.
Ashok Bhandari +3 more
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<sup>15 </sup>N Reaction Monitoring at Low and Inhomogeneous Magnetic Fields Enabled by Hyperpolarization with Parahydrogen. [PDF]
Chemistry15 N reaction monitoring at low and inhomogeneous fields enabled by PHIP. The concept was demonstrated at a magnetic field of 66 mT and 81 ppm inhomogeneity. Specifically, we measured the conversion of 15N‐boronobenzyl‐2‐styrylpyridinium to 15N‐2‐styrylpyridin.
Rodriguez GG +3 more
europepmc +2 more sources
Parahydrogen‐Induced Polarization of Amino Acids [PDF]
Angewandte Chemie International Edition, 2021 AbstractNuclear magnetic resonance (NMR) has become a universal method for biochemical and biomedical studies, including metabolomics, proteomics, and magnetic resonance imaging (MRI). By increasing the signal of selected molecules, the hyperpolarization of nuclear spin has expanded the reach of NMR and MRI even further (e.g. hyperpolarized solid‐state
Andrey N. Pravdivtsev +4 more
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Improving the Catalyst Efficiency for Hyperpolarization of Pyruvate Derivatives by Means of Hydrogenative PHIP. [PDF]
ChemMedChemHyperpolarization (HP) of pyruvate is obtained by means of the parahydrogen based method named parahydrogen induced polarization‐side arm hydrogenation. Cationic rhodium complexes are usually applied for the hydrogenation of the precursor, but the concentration needed to obtain complete reduction in a few seconds of a batch of substrate is relatively ...
Di Matteo G +5 more
europepmc +2 more sources
Pd-based bimetallic catalysts for parahydrogen-induced polarization in heterogeneous hydrogenations [PDF]
Magnetic Resonance, 2021 Production of hyperpolarized catalyst-free gases and liquids by heterogeneous hydrogenation with parahydrogen can be useful for various technical as well as biomedical applications, including in vivo studies, investigations of mechanisms of industrially ...
D. B. Burueva +4 more
doaj +1 more source
Hyperpolarized fumarate via parahydrogen [PDF]
Chemical Communications, 2018 We produce hyperpolarized [1-13C]fumarate in the proton nuclear spin singlet state by pairwise trans-addition of parahydrogen to a molecular precursor using a ruthenium-based catalyst in water.
Barbara Ripka +5 more
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StereoPHIP: Stereoselective Parahydrogen‐Induced Polarization
Angewandte Chemie International Edition, 2023 AbstractParahydrogen‐induced polarization (PHIP) followed by polarization transfer to 13C is a rapidly developing technique for the generation of 13C‐hyperpolarized substrates. Chirality plays an essential role in living systems and differential metabolism of enantiomeric pairs of metabolic substrates is well documented.
Mai T. Huynh +4 more
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Microscopic Pair Potentials and the Physical Properties of the Condensed Phases of Parahydrogen
Applied Sciences, 2022 Equilibrium physical properties of the solid and liquid phases of parahydrogen, computed by first principle computer simulations, are compared for different choices of pair-wise, spherically symmetric intermolecular potentials.
Jieru Hu, Massimo Boninsegni
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Local Superfluidity of Parahydrogen Clusters [PDF]
Physical Review Letters, 2008 4 pages, 4 ...
Mezzacapo, Fabio, Boninsegni, Massimo
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