BioNMR
NMR aggregator & online community since 2003
BioNMR    
Learn or help to learn NMR - get free NMR books!
 

Go Back   BioNMR > NMR community > News from NMR blogs
Advanced Search



Jobs Groups Conferences Literature Pulse sequences Software forums Programs Sample preps Web resources BioNMR issues


Webservers
NMR processing:
MDD
NMR assignment:
Backbone:
Autoassign
MARS
UNIO Match
PINE
Side-chains:
UNIO ATNOS-Ascan
NOEs:
UNIO ATNOS-Candid
UNIO Candid
ASDP
Structure from NMR restraints:
Ab initio:
GeNMR
Cyana
XPLOR-NIH
ASDP
UNIO ATNOS-Candid
UNIO Candid
Fragment-based:
BMRB CS-Rosetta
Rosetta-NMR (Robetta)
Template-based:
GeNMR
I-TASSER
Refinement:
Amber
Structure from chemical shifts:
Fragment-based:
WeNMR CS-Rosetta
BMRB CS-Rosetta
Homology-based:
CS23D
Simshift
Torsion angles from chemical shifts:
Preditor
TALOS
Promega- Proline
Secondary structure from chemical shifts:
CSI (via RCI server)
TALOS
MICS caps, β-turns
d2D
PECAN
Flexibility from chemical shifts:
RCI
Interactions from chemical shifts:
HADDOCK
Chemical shifts re-referencing:
Shiftcor
UNIO Shiftinspector
LACS
CheckShift
RefDB
NMR model quality:
NOEs, other restraints:
PROSESS
PSVS
RPF scores
iCing
Chemical shifts:
PROSESS
CheShift2
Vasco
iCing
RDCs:
DC
Anisofit
Pseudocontact shifts:
Anisofit
Protein geomtery:
Resolution-by-Proxy
PROSESS
What-If
iCing
PSVS
MolProbity
SAVES2 or SAVES4
Vadar
Prosa
ProQ
MetaMQAPII
PSQS
Eval123D
STAN
Ramachandran Plot
Rampage
ERRAT
Verify_3D
Harmony
Quality Control Check
NMR spectrum prediction:
FANDAS
MestReS
V-NMR
Flexibility from structure:
Backbone S2
Methyl S2
B-factor
Molecular dynamics:
Gromacs
Amber
Antechamber
Chemical shifts prediction:
From structure:
Shiftx2
Sparta+
Camshift
CH3shift- Methyl
ArShift- Aromatic
ShiftS
Proshift
PPM
CheShift-2- Cα
From sequence:
Shifty
Camcoil
Poulsen_rc_CS
Disordered proteins:
MAXOCC
Format conversion & validation:
CCPN
From NMR-STAR 3.1
Validate NMR-STAR 3.1
NMR sample preparation:
Protein disorder:
DisMeta
Protein solubility:
camLILA
ccSOL
Camfold
camGroEL
Zyggregator
Isotope labeling:
UPLABEL
Solid-state NMR:
sedNMR


Reply
Thread Tools Search this Thread Rate Thread Display Modes
  #1  
Unread 10-19-2020, 05:07 PM
nmrlearner's Avatar
Senior Member
 
Join Date: Jan 2005
Posts: 22,523
Points: 193,617, Level: 100
Points: 193,617, Level: 100 Points: 193,617, Level: 100 Points: 193,617, Level: 100
Level up: 0%, 0 Points needed
Level up: 0% Level up: 0% Level up: 0%
Activity: 50.7%
Activity: 50.7% Activity: 50.7% Activity: 50.7%
Last Achievements
Award-Showcase
NMR Credits: 0
NMR Points: 193,617
Downloads: 0
Uploads: 0
Default Dynamic nuclear polarization and ESR hole burning in As doped silicon #DNPNMR

From The DNP-NMR Blog:

Dynamic nuclear polarization and ESR hole burning in As doped silicon #DNPNMR

Järvinen, J., D. Zvezdov, J. Ahokas, S. Sheludiakov, L. Lehtonen, S. Vasiliev, L. Vlasenko, Y. Ishikawa, and Y. Fujii. “Dynamic Nuclear Polarization and ESR Hole Burning in As Doped Silicon.” Physical Chemistry Chemical Physics 22, no. 18 (2020): 10227–37.


https://doi.org/10.1039/C9CP06859G.


We present an experimental study of the Dynamic Nuclear Polarization (DNP) of 29Si nuclei in silicon crystals of natural abundance doped with As in the temperature range 0.1-1 K and in strong magnetic field of 4.6 T. This ensures very high degree of electron spin polarization, extremely slow nuclear relaxation and optimal conditions for realization of Overhauser and resolved solid effects. We found that the solid effect DNP leads to an appearance of a pattern of holes and peaks in the ESR line, separated by the super-hyperfine interaction between the donor electron and 29Si nuclei closest to the donor. On the contrary, the Overhauser effect DNP mainly affects the remote 29Si nuclei having the weakest interaction with the donor electron. This leads to an appearance of a very narrow ( 3 mG wide) hole in the ESR line. We studied relaxation of the holes after burning, which is caused by the nuclear spin diffusion. Analyzing the dynamics of the hole in the spectrum with a simple one-dimensional diffusion model leads to a value of the diffusion coefficient D = 8(3)10?9 G2/s. Our data indicate that the spin diffusion is not completely prevented even in the frozen core near the donors. The emergence of the narrow hole after the Overhauser DNP may be explained by a partial "softening" of the frozen core caused by decoupling of the donor electron and remote 29Si nuclei.




Go to The DNP-NMR Blog for more info.
Reply With Quote


Did you find this post helpful? Yes | No

Reply
Similar Threads
Thread Thread Starter Forum Replies Last Post
Endogenous dynamic nuclear polarization NMR of hydride-terminated silicon nanoparticles #DNPNMR
From The DNP-NMR Blog: Endogenous dynamic nuclear polarization NMR of hydride-terminated silicon nanoparticles #DNPNMR Ha, Michelle, Alyxandra N. Thiessen, Ivan V. Sergeyev, Jonathan G.C. Veinot, and Vladimir K. Michaelis. “Endogenous Dynamic Nuclear Polarization NMR of Hydride-Terminated Silicon Nanoparticles.” Solid State Nuclear Magnetic Resonance 100 (August 2019): 77–84. https://doi.org/10.1016/j.ssnmr.2019.04.001.
nmrlearner News from NMR blogs 0 05-06-2019 04:47 PM
Dynamic Polarization and Relaxation of 75As Nuclei in Silicon at High Magnetic Field and Low Temperature #DNPNMR
From The DNP-NMR Blog: Dynamic Polarization and Relaxation of 75As Nuclei in Silicon at High Magnetic Field and Low Temperature #DNPNMR p.p1 {margin: 0.0px 0.0px 0.0px 36.0px; text-indent: -36.0px; font: 12.0px Helvetica} Järvinen, J., et al., Dynamic Polarization and Relaxation of 75As Nuclei in Silicon at High Magnetic Field and Low Temperature. Appl. Magn. Reson., 2017. 48(5): p. 473-483. http://dx.doi.org/10.1007/s00723-017-0875-z
nmrlearner News from NMR blogs 0 07-17-2017 04:07 PM
Dynamic Polarization and Relaxation of 75As Nuclei in Silicon at High Magnetic Field and Low Temperature #DNPNMR
From The DNP-NMR Blog: Dynamic Polarization and Relaxation of 75As Nuclei in Silicon at High Magnetic Field and Low Temperature #DNPNMR p.p1 {margin: 0.0px 0.0px 0.0px 36.0px; text-indent: -36.0px; font: 12.0px Helvetica} Järvinen, J., et al., Dynamic Polarization and Relaxation of 75As Nuclei in Silicon at High Magnetic Field and Low Temperature. Appl. Magn. Reson., 2017. 48(5): p. 473-483. http://dx.doi.org/10.1007/s00723-017-0875-z
nmrlearner News from NMR blogs 0 05-02-2017 01:52 AM
Radical-free dynamic nuclear polarization using electronic defects in silicon
From The DNP-NMR Blog: Radical-free dynamic nuclear polarization using electronic defects in silicon Cassidy, M.C., et al., Radical-free dynamic nuclear polarization using electronic defects in silicon. Physical Review B, 2013. 87(16): p. 161306. http://link.aps.org/doi/10.1103/PhysRevB.87.161306
nmrlearner News from NMR blogs 0 09-19-2014 03:07 PM
Dynamic Nuclear Polarization of 1H, 13C, and 59Co in a Tris(ethylenediamine)cobalt(III) Crystalline Lattice Doped with Cr(III)
From The DNP-NMR Blog: Dynamic Nuclear Polarization of 1H, 13C, and 59Co in a Tris(ethylenediamine)cobalt(III) Crystalline Lattice Doped with Cr(III) Corzilius, B., et al., Dynamic Nuclear Polarization of 1H, 13C, and 59Co in a Tris(ethylenediamine)cobalt(III) Crystalline Lattice Doped with Cr(III). J. Am. Chem. Soc., 2014. 136(33): p. 11716-11727.
nmrlearner News from NMR blogs 0 09-05-2014 03:03 PM
Dynamic Nuclear Polarization of 1H, 13C, and 59Co in a Tris(ethylenediamine)cobalt(III) Crystalline Lattice Doped with Cr(III)
From The DNP-NMR Blog: Dynamic Nuclear Polarization of 1H, 13C, and 59Co in a Tris(ethylenediamine)cobalt(III) Crystalline Lattice Doped with Cr(III) Corzilius, B., et al., Dynamic Nuclear Polarization of H, C, and Co in a Tris(ethylenediamine)cobalt(III) Crystalline Lattice Doped with Cr(III). J Am Chem Soc, 2014. http://www.ncbi.nlm.nih.gov/pubmed/25069794
nmrlearner News from NMR blogs 0 08-11-2014 02:21 PM
Dynamic Nuclear Polarization NMR of Low-? Nuclei: Structural Insights into Hydrated Yttrium-Doped BaZrO3
From The DNP-NMR Blog: Dynamic Nuclear Polarization NMR of Low-? Nuclei: Structural Insights into Hydrated Yttrium-Doped BaZrO3 Blanc, F., et al., Dynamic Nuclear Polarization NMR of Low-? Nuclei: Structural Insights into Hydrated Yttrium-Doped BaZrO3. The Journal of Physical Chemistry Letters, 2014: p. 2431-2436. http://dx.doi.org/10.1021/jz5007669
nmrlearner News from NMR blogs 0 07-04-2014 08:28 PM
Fast Characterization of Functionalized Silica Materials by Silicon-29 Surface-Enhanced NMR Spectroscopy Using Dynamic Nuclear Polarization
Fast Characterization of Functionalized Silica Materials by Silicon-29 Surface-Enhanced NMR Spectroscopy Using Dynamic Nuclear Polarization Moreno Lelli, David Gajan, Anne Lesage, Marc A. Caporini, Veronika Vitzthum, Pascal Mie?ville, Florent He?roguel, Fernando Rasco?n, Arthur Roussey, Chloe? Thieuleux, Malika Boualleg, Laurent Veyre, Geoffrey Bodenhausen, Christophe Cope?ret and Lyndon Emsley http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jacsat/0/jacsat.ahead-of-print/ja110791d/aop/images/medium/ja-2010-10791d_0005.gif Journal of the American Chemical Society...
nmrlearner Journal club 0 02-01-2011 06:33 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



BioNMR advertisements to pay for website hosting and domain registration. Nobody does it for us.



Powered by vBulletin® Version 3.7.3
Copyright ©2000 - 2023, Jelsoft Enterprises Ltd.
Copyright, BioNMR.com, 2003-2013
Search Engine Friendly URLs by vBSEO 3.6.0

All times are GMT. The time now is 02:41 AM.


Map