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Relevant bibliographies by topics / Hyperpolarisation

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Journal articles
Dissertations / Theses
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Academic literature on the topic 'Hyperpolarisation'

Author: Grafiati

Published: 4 June 2021

Last updated: 16 June 2025

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Journal articles on the topic "Hyperpolarisation"

1

Kovtunov, Kirill V., Igor V. Koptyug, Marianna Fekete, et al. "Parawasserstoff‐induzierte Hyperpolarisation von Gasen." Angewandte Chemie 132, no. 41 (2020): 17940–49. http://dx.doi.org/10.1002/ange.201915306.

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Bengs, Christian. "Hyperpolarisation criteria in magnetic resonance." Journal of Magnetic Resonance 360 (March 2024): 107631. http://dx.doi.org/10.1016/j.jmr.2024.107631.

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Iali, Wissam, Peter J. Rayner, Adel Alshehri, A. Jonathan Holmes, Amy J. Ruddlesden, and Simon B. Duckett. "Direct and indirect hyperpolarisation of amines using parahydrogen." Chemical Science 9, no. 15 (2018): 3677–84. http://dx.doi.org/10.1039/c8sc00526e.

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Rayner, Peter J., Ben J. Tickner, Wissam Iali, Marianna Fekete, Alastair D. Robinson, and Simon B. Duckett. "Relayed hyperpolarization from para-hydrogen improves the NMR detectability of alcohols." Chemical Science 10, no. 33 (2019): 7709–17. http://dx.doi.org/10.1039/c9sc02765c.

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Lloyd, Lyrelle S., Aziz Asghar, Michael J. Burns, et al. "Hyperpolarisation through reversible interactions with parahydrogen." Catal. Sci. Technol. 4, no. 10 (2014): 3544–54. http://dx.doi.org/10.1039/c4cy00464g.

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Halse, Meghan E. "Perspectives for hyperpolarisation in compact NMR." TrAC Trends in Analytical Chemistry 83 (October 2016): 76–83. http://dx.doi.org/10.1016/j.trac.2016.05.004.

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Olaru, A. M., M. J. Burns, G. G. R. Green, and S. B. Duckett. "SABRE hyperpolarisation of vitamin B3 as a function of pH." Chemical Science 8, no. 3 (2017): 2257–66. http://dx.doi.org/10.1039/c6sc04043h.

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Tickner, Ben J., Sanna Komulainen, Sanna Palosaari, et al. "Hyperpolarised NMR to aid molecular profiling of electronic cigarette aerosols." RSC Advances 12, no. 3 (2022): 1479–85. http://dx.doi.org/10.1039/d1ra07376a.

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Tickner, Ben J., Yulia Borozdina, Simon B. Duckett, and Goran Angelovski. "Exploring the hyperpolarisation of EGTA-based ligands using SABRE." Dalton Transactions 50, no. 7 (2021): 2448–61. http://dx.doi.org/10.1039/d0dt03839c.

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Wong, Chin Min, Marianna Fekete, Rhianna Nelson-Forde, et al. "Harnessing asymmetric N-heterocyclic carbene ligands to optimise SABRE hyperpolarisation." Catalysis Science & Technology 8, no. 19 (2018): 4925–33. http://dx.doi.org/10.1039/c8cy01214h.

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Dissertations / Theses on the topic "Hyperpolarisation"

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Adams, Ralph William. "Applications of hyperpolarisation in magnetic resonance imaging." Thesis, University of York, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.516647.

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Engelbertz, Andre. "Variation von NMR-Signalen durch Hyperpolarisation und Ultraschall." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=983735727.

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John, Richard. "Rationalising reactivity : a combined DFT and hyperpolarisation approach." Thesis, University of York, 2014. http://etheses.whiterose.ac.uk/15397/.

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The complexes Ru(CO)3(dpae) and Ru(CO)2(dpae)(PPh3) have been found experimentally to undergo various reactions with para-hydrogen and substrates. Reactions with para-hydrogen and diphenylacetylene led to the detection of hydrogenation products, confirming the complexes as hydrogenation catalysts. The catalytic behaviour was identified to be different to that of the equivalent phosphine containing complex. High level DFT investigations have revealed significant insight into the mechanism of reaction. The experimentally detected dihydride complex Ru(H)2(CO)(dpae) was calculated to be a viable reaction product, with various pathways modelled for rearrangement. In contrast, the rearrangements for the complex Ru(H)2(CO)dpae)(PPh3) were found to compete with the reductive elimination of dihydrogen. The routes of reaction by initiation method was examined, with the high energy 14-electron intermediates only accessible photochemically. Routes for the hydrogenation of diphenylacetylene were identified, alongside the mechanism of cis-trans scrambling of stilbene and formation of 1,2-diphenylethane. The formation of 1,2,3,4-tetraphenylbutadiene was also rationalised. The reaction of hydrogen with W(N2)2(dppe-κ2P)2 was shown theoretically to involve an intra-molecular ortho-metallation reaction from the reactive 14-electron intermediate W(dppe-κ2P)2. Low barriers were obtained from the 16-electron intermediate W(H)2(dppe-κ2P)2. This rationalised the formation of the experimentally proposed complex W(H)3(dppe-κ2P)(PPh(C6H4CH2CH2Ph2P)-κ2P). The 14-electron intermediate W(dppe-κ2P)2 was calculated to adopt a butterfly geometry in a singlet state, which than rearranges upon reaction to form 16-electron intermediates. The observation of PHIP in the end products confirms the involvement of an electronic singlet state. Limited solvation was predicted from THF despite its ability to coordinate to metal centres. In summary, the combination of high level DFT models and the use of para-hydrogen reactions is demonstrated to be a powerful tool for probing chemical processes and pathways, and contributes to achieving a greater understanding of reactivity in these metal complex systems.

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Bunn, Sarah Kathryn. "Hyperpolarisation-activated cation currents of dorsal root ganglion neurons." Thesis, Imperial College London, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.429399.

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Momin, Aliakmal. "The role of hyperpolarisation-activated current, Ih, in nociception." Thesis, University of Cambridge, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.612105.

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Glöggler, Stefan [Verfasser]. "Kernmagnetische Resonanz miniaturisiert : Hyperpolarisation, niedrige Magnetfelder und Mikrostrukturen / Stefan Glöggler." Aachen : Hochschulbibliothek der Rheinisch-Westfälischen Technischen Hochschule Aachen, 2013. http://d-nb.info/1032914637/34.

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Emery, Edward Charles. "The role of Hyperpolarisation-Activated Cyclic Nucleotide-modulated (HCN) ion channels in pain." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610460.

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8

Champigny, Guy. "Caractérisation d'un courant entrant activé en hyperpolarisation sur le sinus veineux de batracien." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb376037977.

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Ruddlesden, Amy. "Novel neutral iridium catalysts for effective hyperpolarisation and hydrogenation : a synthetic and mechanistic study." Thesis, University of York, 2017. http://etheses.whiterose.ac.uk/18700/.

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Since 2009, when the Signal Amplification By Reversible Exchange (SABRE) process, which transfers polarisation from parahydrogen to substrates in a non-hydrogenative manner, was first published, substantial efforts have been made in method optimisation and catalyst development. This work presents multi-step syntheses and studies on a series of novel neutral bidentate iridium carbene complexes, [Ir(COD)(R-NHC-O)]. The carbene ligands have a pendent phenolate group, incorporating the electron-withdrawing substituents, NO2, COOMe, Cl and H. The reactivity of each complex with substrate and hydrogen has enabled the identification of several intermediates, including dihydride COD complexes, [Ir(H)2(COD)(R-NHC-O)]. COD hydrogenation facilitates the formation of SABRE-active pyridyl dihydride species with structures dependent on the R substituent and solvent used. In DCM, the Ir-O bond is stable and complexes of [Ir(H)2(R-NHC-O)(py)2] form. However, in methanol, when the electron density is increased as R is changed to an H substituent, complete Ir-O bond cleavage occurs to form [Ir(H)2(H-NHC-O)−(py)3]+. When studied with parahydrogen, these complexes act as efficient SABRE catalysts for a variety of substrates in a range of polarity solvents. They undergo the necessary substrate and hydrogen exchange processes, leading to the observation of enhanced NMR signals for pyridine, nicotinamide, nicotine and nicotinaldehyde. A study into the parahydrogenation of phenylacetylene using the NO2-containing catalyst has also been completed. Although it was less reactive than Crabtree’s catalyst it proved more stable due to minimal degradation over time.

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Champigny, Guy. "Caracterisation ionique d'un courant entrant active en hyperpolarisation sur le sinus veineux de batracien." Poitiers, 1987. http://www.theses.fr/1987POIT2281.

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Book chapters on the topic "Hyperpolarisation"

1

Wilcock, Alexander T. M., and Ryan E. Mewis. "Hyperpolarisation techniques." In Nuclear Magnetic Resonance. Royal Society of Chemistry, 2022. http://dx.doi.org/10.1039/9781839167690-00181.

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Mewis, Ryan E. "Hyperpolarisation techniques." In Nuclear Magnetic Resonance. Royal Society of Chemistry, 2021. http://dx.doi.org/10.1039/9781839164965-00151.

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Paetz gen. Schieck, Hans. "Anwendungen: Fusion, Kernspin-Tomographie, Hyperpolarisation." In essentials. Springer Fachmedien Wiesbaden, 2020. http://dx.doi.org/10.1007/978-3-658-31360-9_7.

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Equbal, Asif, and Ryan E. Mewis. "Hyperpolarisation techniques." In Nuclear Magnetic Resonance. Royal Society of Chemistry, 2023. http://dx.doi.org/10.1039/bk9781837672455-00146.

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This chapter focuses on the literature published in 2022, covering hyperpolarisation techniques associated with NMR. The literature reviewed relates to the hyperpolarisation techniques of dynamic nuclear polarisation (DNP), spin-exchange optical pumping (SEOP), parahydrogen induced polarisation (PHIP) and signal amplification by reversible exchange (SABRE). In addition to reviewing studies that have been conducted using these techniques, a number of reports are discussed that relate to advances in associated hardware and instrumentation.

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Equbal, Asif, and Ryan E. Mewis. "Hyperpolarisation techniques." In Nuclear Magnetic Resonance. Royal Society of Chemistry, 2024. http://dx.doi.org/10.1039/9781837675630-00157.

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This chapter focuses on the literature published in 2023 covering hyperpolarisation techniques associated with NMR. The literature reviewed relates to the hyperpolarisation techniques of Dynamic Nuclear Polarisation (DNP), Spin-Exchange Optical Pumping (SEOP), Parahydrogen Induced Polarisation (PHIP) and Signal Amplification by Reversible Exchange (SABRE). In addition to reviewing studies that have been conducted using these techniques, a number of reports are discussed that relate to advances in associated hardware and instrumentation.

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6

Salvi, Nicola. "Applications of Hyperpolarisation and NMR Long-Lived States in Drug Screening." In Annual Reports on NMR Spectroscopy. Elsevier, 2019. http://dx.doi.org/10.1016/bs.arnmr.2018.08.002.

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7

Oerther, C., and I. Marco-Rius. "Fast Multi-dimensional NMR for In Vivo Spectroscopy." In Fast 2D Solution-state NMR. The Royal Society of Chemistry, 2023. http://dx.doi.org/10.1039/bk9781839168062-00415.

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Molecular imaging techniques based on hyperpolarisation-enhanced magnetic resonance (HP-MR) are revolutionising disease diagnoses. By measuring the chemical kinetics and pool sizes of specific biochemical compounds in vivo, these have the potential to detect small, yet significant differences between healthy and pathological cell metabolism in the imaging subject. In this chapter, fast-imaging strategies for spectral and spatially resolved HP-MR are reviewed. Presently there exist pulse sequences that can probe up to five spatiotemporal or frequency dimensions in vivo and can be tailored to the HP substrate and products to be measured, their SNR and resolution needed. We organize this review by discussing the current state of in vivo MR, including in vivo MR of hyperpolarised proton and carbon-13, as well as deuterium and nitrogen-15. Then, we discuss acquisition strategies for HP-MR in vivo and their limitations, including hardware and software capabilities of NMR spectroscopy/MRI detection systems, and other additional challenges of data sampling in living biological systems.

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Smith, Andrew G. "GABAergic Neurotransmission and Toxicity 1: Organochlorines." In Neurotransmitters and Toxicology. Royal Society of Chemistry, 2024. http://dx.doi.org/10.1039/9781839165795-00129.

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In the 1950s, the introduction of organochlorine insecticides containing active ingredients such as lindane, dieldrin, endrin, chlordane, heptachlor, endosulfan and toxaphene was extremely effective in combating a wide variety of crop and livestock pests. In the 1980s, the inhibitory molecular action causing convulsions and neurotoxicity was identified as binding to the pre-synaptic γ-aminobutyric acid-binding receptor A (GABAA)-regulated chloride channel, near to the picrotoxinin-binding site, antagonising membrane hyperpolarisation and inward chloride current. However, it became evident that the properties that made them excellent insecticides might also make them toxic to humans and non-target animal species. Accidental, occupational and suicidal convulsions occurred in humans, and there were marked effects on wildlife, especially in birds, due to accumulation up the food chain. Differential metabolism was an important factor determining the differences between individual insecticides. After a few decades of use, these pesticides were phased out and banned. The now-established multiple aspects of their toxicity in vivo or in vitro continue to be of concern regarding their possible adverse effects on human health through environmental exposure.

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Robertson, Thomas B. R., and Ryan E. Mewis. "Perspective on the Hyperpolarisation Technique Signal Amplification by Reversible Exchange (SABRE) in NMR Spectroscopy and MR Imaging." In Annual Reports on NMR Spectroscopy. Elsevier, 2018. http://dx.doi.org/10.1016/bs.arnmr.2017.08.001.

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