[Question from NMRWiki Q&A forum] paramagnetic oxygen in solution NMR
paramagnetic oxygen in solution NMR
A student is running a kinetics experiment in a J-Young tube under 5-10 atm of oxygen, much like in this journal article:http://pubs.acs.org/doi/abs/10.1021/ja9061932
Student is seeing reduction in signal from his compound (slightly polar) and his internal standard (non-polar). Obviously paramagnetic oxygen?
The part I can't figure out: student is NOT seeing a reduction in his solvent peak. Solvent is benzene or toluene. I am assuming he is using at least some deuterated solvent.
I have found a lot of literature on the interaction of paramagnetic...
nmrlearner
News from other NMR forums
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06-03-2011 12:11 AM
In vivo oxygen-17 NMR for imaging brain oxygen metabolism at high field
In vivo oxygen-17 NMR for imaging brain oxygen metabolism at high field
Publication year: 2011
Source: Progress in Nuclear Magnetic Resonance Spectroscopy, In Press, Accepted Manuscript, Available online 23 April 2011</br>
Xiao-Hong, Zhu , Wei, Chen</br>
*Highlights:*? This article reviews the developments of in vivo 17O NMR imaging in brain research. ? In vivo 17O NMR imaging has improved significantly at high/ultrahigh field. ? In vivo 17O NMR can noninvasively image brain oxygen metabolism and perfusion. ? In vivo 17O NMR is useful for mapping the functional change in oxygen...
nmrlearner
Journal club
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04-24-2011 03:42 PM
Solid-state (55)Mn NMR spectroscopy of bis(?-oxo)dimanganese(IV) [Mn(2)O(2)(salpn)(2)], a model for the oxygen evolving complex in photosystem II.
Solid-state (55)Mn NMR spectroscopy of bis(?-oxo)dimanganese(IV) , a model for the oxygen evolving complex in photosystem II.
Solid-state (55)Mn NMR spectroscopy of bis(?-oxo)dimanganese(IV) , a model for the oxygen evolving complex in photosystem II.
J Am Chem Soc. 2010 Dec 1;132(47):16727-9
Authors: Ellis PD, Sears JA, Yang P, Dupuis M, Boron TT, Pecoraro VL, Stich TA, Britt RD, Lipton AS
We have examined the antiferromagneticly coupled bis(?-oxo)dimanganese(IV) complex (1) with (55)Mn solid-state NMR at cryogenic temperatures and...
nmrlearner
Journal club
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03-13-2011 04:01 AM
Elevating Oxygen - Chemical & Engineering News
<img alt="" height="1" width="1" />
Elevating Oxygen
Chemical & Engineering News
Oxygen is the ugly duckling of biomolecular nuclear magnetic resonance. Although it is a key atom in proteins and nucleic acids, its siblings carbon, ...
Elevating Oxygen - Chemical & Engineering News
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nmrlearner
Online News
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01-03-2011 10:48 PM
[NMR900 blog] C&EN News of the Week: Elevating Oxygen
C&EN News of the Week: Elevating Oxygen
Two recent NMR papers by Gang Wu (Queen's) and coworkers are highlighted by Chemical & Engineering News in their first issue of 2011.
http://pubs.acs.org/cen/news/89/i01/8901notw4.html
Both papers deal with 17O NMR in large protein complexes, in solution and in solid state. New research approaches proposed by Gang Wu and his team have a potential to significantly advance the field of protein NMR spectroscopy.
Jianfeng Zhu and Gang Wu, "Quadrupole Central Transition 17O NMR Spectroscopy of Biological Macromolecules in Aqueous Solution,"...
nmrlearner
News from NMR blogs
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01-03-2011 10:48 PM
[NMR paper] Mapping oxygen accessibility to ribonuclease a using high-resolution NMR relaxation s
Mapping oxygen accessibility to ribonuclease a using high-resolution NMR relaxation spectroscopy.
Related Articles Mapping oxygen accessibility to ribonuclease a using high-resolution NMR relaxation spectroscopy.
Biophys J. 2004 Mar;86(3):1713-25
Authors: Teng CL, Bryant RG
Paramagnetic contributions to nuclear magnetic spin-lattice relaxation rate constant induced by freely diffusing molecular oxygen measured at hundreds of different protein proton sites provide a direct means for characterizing the exploration of the protein by oxygen. This...
nmrlearner
Journal club
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11-24-2010 09:25 PM
[NMR paper] Oxygen as a paramagnetic probe of membrane protein structure by cysteine mutagenesis
Oxygen as a paramagnetic probe of membrane protein structure by cysteine mutagenesis and (19)F NMR spectroscopy.
Related Articles Oxygen as a paramagnetic probe of membrane protein structure by cysteine mutagenesis and (19)F NMR spectroscopy.
J Am Chem Soc. 2002 Feb 27;124(8):1778-81
Authors: Luchette PA, Prosser RS, Sanders CR
Oxygen solubility increases toward the hydrophobic interior of membranes. Using NMR, this O(2) solubility gradient gives rise to an exquisite range of position-dependent paramagnetic effects at partial pressures of 100...
nmrlearner
Journal club
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11-24-2010 08:49 PM
Oxygen-17 NMR spectroscopy: Basic principles and applications (part II)
Oxygen-17 NMR spectroscopy: Basic principles and applications (part II)
Publication year: 2010
Source: Progress in Nuclear Magnetic Resonance Spectroscopy, In Press, Corrected Proof, Available online 13 February 2010</br>
Ioannis P., Gerothanassis</br>
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