You can use 100-110 us or 2500 Hz to calibrate ROESY spin lock power.
- Vivek
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[Question from NMRWiki Q&A forum] Odd 1D-ROESY Result
Odd 1D-ROESY Result
Hello,
I've been trying to assign peaks in a proton spectrum of a highly dynamic ring, namely 2-deutero-diselenane. The structure is like 1,3-dioxane but with two seleniums instead:http://en.wikipedia.org/wiki/1,3-Dioxane
The experiment is at low temperature where exchange is slow on the chemical shift timescale but probably fast on the relaxation timescale. What I can't figure out is that when I irradiate the H2 signals in a 1D-ROESY, I see the following peaks:-Negative irradiated H2.-Negative peak for non-irradiated H2, due to exchange due to...
nmrlearner
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08-08-2011 02:02 AM
[Question from NMRWiki Q&A forum] Odd 1D-ROESY Result
Odd 1D-ROESY Result
Hello,
I've been trying to assign peaks in a proton spectrum of a highly dynamic ring, namely 2-deutero-diselenane. The structure is like 1,3-dioxane but with two seleniums instead:http://en.wikipedia.org/wiki/1,3-Dioxane
The experiment is at low temperature where exchange is slow on the chemical shift timescale but probably fast on the relaxation timescale. What I can't figure out is that when I irradiate the H2 signals in a 1D-ROESY, I see the following peaks:-Negative irradiated H2.-Negative peak for non-irradiated H2, due to exchange due to...
nmrlearner
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0
08-08-2011 01:52 AM
[Question from NMRWiki Q&A forum] NMR Lock signal
NMR Lock signal
THis is my lock signal....what is up with it, and what do I do?https://picasaweb.google.com/113100759436397078363/LockSignal02#slideshow/5631842657786659330
Check if somebody has answered this question on NMRWiki QA forum
[Question from NMRWiki Q&A forum] How to correctly set ROESY spin-lock power?
How to correctly set ROESY spin-lock power?
I'm using roesyph.2 pulse sequence (Bruker) and I would like to know how to calculate spin-lock power in Hz for this experiment. Thnx
Justyna
ps. I'm aware that for hard pulse it is 1/pw360, therefore can I assume that in this case it is 1/2*P25?
nmrlearner
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03-08-2011 04:10 PM
[Question from NMRWiki Q&A forum] ROESY spin-lock power
ROESY spin-lock power
I'm using roesyph.2 pulse sequence (Bruker) and I would like to know how to calculate spin-lock power in Hz for this experiment. Thnx
Justyna
ps. I'm aware that for hard pulse it is 1/pw360, therefore can I assume that in this case it is 1/2*P25?
nmrlearner
News from other NMR forums
0
01-17-2011 02:40 AM
[NMR paper] An NMR experiment for the accurate measurement of heteronuclear spin-lock relaxation
An NMR experiment for the accurate measurement of heteronuclear spin-lock relaxation rates.
Related Articles An NMR experiment for the accurate measurement of heteronuclear spin-lock relaxation rates.
J Am Chem Soc. 2002 Sep 11;124(36):10743-53
Authors: Korzhnev DM, Skrynnikov NR, Millet O, Torchia DA, Kay LE
Rotating-frame relaxation rates, R(1)(rho), are often measured in NMR studies of protein dynamics. We show here that large systematic errors can be introduced into measured values of heteronuclear R(1)(rho) rates using schemes which are...
Linear Mode
