NMR of surfaces: sub-monolayer sensitivity with hyperpolarized 129Xe

Jänsch, H.J.; Hof, T.; Ruth, Urs; Schmidt, Jan Peter; Stahl, D.; Fick, D.

doi:10.1016/s0009-2614(98)01019-7

Cited by 37 publications

(11 citation statements)

References 34 publications

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“…[58] The advent of continuous-flow production of HP 129 Xe [44a] was soon applied to greatly facilitate studies of materials surfaces, [59] including under conditions of magic angle spinning. [60] Since that work, HP xenon has been used to study diffusion in confined spaces or porous media [61] , [62] , [63] ; image such systems as a function of gas flow [64] or 129 Xe chemical shift [65] ; or spectroscopically probe single-crystal surfaces [66] , liquid crystals, [67] or combustion processes. [68] However, the greatest body of materials-related work has concerned the effort to probe void spaces and surfaces in microporous or nanoporous materials with HP 129 Xe, thereby providing information about pore size, pore shape, and gas dynamics in: nanochanneled organic, organometallic, and peptide-based molecular materials [69] (including in macroscopically oriented single crystals [70] ); multi-walled carbon nanotubes [71] ; gas hydrate clathrates [72] ; porous polymeric materials and aerogels [73] ; metalorganic frameworks [74] ; calixarene-based materials and nanoparticles [75] ; organo-clays [76] ; mesoporous silicas [77] ; and zeolites and related materials [78] -efforts that have been aided by computational studies of xenon in confined spaces (e.g., Refs.…”

Section: 1002/chem201603884 Chemistry -A European Journalmentioning

confidence: 99%

NMR Hyperpolarization Techniques of Gases

Barskiy

Coffey

Nikolaou

et al. 2016

Chemistry A European J

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Nuclear spin polarization can be significantly increased through the process of hyperpolarization, leading to an increase in the sensitivity of nuclear magnetic resonance (NMR) experiments by 4-8 orders of magnitude. Hyperpolarized gases, unlike liquids and solids, can be more readily separated and purified from the compounds used to mediate the hyperpolarization processes. These pure hyperpolarized gases enabled many novel MRI applications including the visualization of void spaces, imaging of lung function, and remote detection. Additionally, hyperpolarized gases can be dissolved in liquids and can be used as sensitive molecular probes and reporters. This mini-review covers the fundamentals of the preparation of hyperpolarized gases and focuses on selected applications of interest to biomedicine and materials science.

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Section: 1002/chem201603884 Chemistry -A European Journalmentioning

confidence: 99%

NMR Hyperpolarization Techniques of Gases

Barskiy

Coffey

Nikolaou

et al. 2016

Chemistry A European J

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“…A polarization degree of ≈10% is currently standard for Xe polarizers using optical pumping of Rb and spin exchange (Zook and Bowers 2001), with an output close to 1 l h −1 . For small quantities, a much higher degree of polarization of 70% has been reported (Jänsch et al 1998, Ruth et al 1999. A new polarizer (Zook et al 2002) using 210 W of laser power reports high capacity production of xenon with polarization degree >65%.…”

Section: Production Of Hyperpolarizationmentioning

confidence: 99%

Hyperpolarized xenon in NMR and MRI

Oros¹,

2004

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Hyperpolarized gases have found a steadily increasing range of applications in nuclear magnetic resonance (NMR) and NMR imaging (MRI). They can be regarded as a new class of MR contrast agent or as a way of greatly enhancing the temporal resolution of the measurement of processes relevant to areas as diverse as materials science and biomedicine. We concentrate on the properties and applications of hyperpolarized xenon. This review discusses the physics of producing hyperpolarization, the NMR-relevant properties of 129 Xe, specific MRI methods for hyperpolarized gases, applications of xenon to biology and medicine, polarization transfer to other nuclear species and low-field imaging.

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“…These atoms cannot be optically pumped from their electronic ground state (although He can be pumped in the metastable state [10,11]); spin exchange allows one to optically pump an alkali gas (typically rubidium) and transfer the spin polarization from there to the Xe nuclear spin. This method was pioneered by Happer [12], applied to the study of surfaces [13,14], and used in a number of medical applications [15,16,11].…”

Section: Spin Exchangementioning

confidence: 99%

Laser‐Assisted Magnetic Resonance: Principles and Applications

Suter

Gutschank

2007

ChemInform

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Abstract. Laser radiation can be used in various magnetic resonance experiments. This chapter discusses a number of cases, where laser light either improves the information content of conventional experiments or makes new types of experiments possible, which could not be performed with conventional means. Sensitivity is often the main reason for using light, but it also allows one to become more selective, e.g. by selecting signals only from small parts of the sample. Examples are given for NMR, NQR, and EPR spectra that use were taken with the help of coherent optical radiation.

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NMR of surfaces: sub-monolayer sensitivity with hyperpolarized 129Xe

Cited by 37 publications

References 34 publications

NMR Hyperpolarization Techniques of Gases

NMR Hyperpolarization Techniques of Gases

Hyperpolarized xenon in NMR and MRI

Laser‐Assisted Magnetic Resonance: Principles and Applications

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