Tagged questions

Why is the T1 relaxation time of protons shorter than for other nuclei?

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So I think this could be asked in my oral exam. Why are the T1 relaxation times in NMR spectroscopy shorter than those o...
NMR Dummy 1 Jan 25 '17 at 09:56

Relaxation rate of bulk (pure) water at high frequencies

1 0 1k
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Hi all, Does anyone know if NMR relaxation rates of bulk (pure) water has been measured experimentally at several hundr...
Jerry Hirschinger 199 Jul 21 '16 at 05:08

How to edit format of Variables in NMRPipe?

0 0 972
answers votes views
Dear all, I would like to change the number of decimal place for the X and Y ppm values in nmrdraw (peak detection). The...
Jerry J 1 Aug 18 '15 at 14:37

Absence of some signals on 1H and 13C spectra of polyaromatic carboximidate

3 0 5k
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Hi, I have encountered a strange behaviour of some signals (they are absent) in a series of polycyclic aromatic carboxi...
zablociak 21 Mar 23 '15 at 12:11

Choice of relaxation delay time (d1) in 2D experiments.

1 0 3k
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Hi, Most people tend to use a lower d1 for 2D than for 1D. Help me understand why. Furthermore, supposing you know you...
gravatar 83 Mar 09 '15 at 02:21

Measuring T1 for a low concentration (1mM) compound in water.

1 0 4k
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Hi, I'm trying to measure T1 for a compund at 1mM in water using t1ir. Seeing how my concentration is so low, phasing m...
Ulrich Haunz 210 Oct 23 '14 at 08:39

T2 relaxation (CPMG) measurement of 13C high resolution spectra

1 0 6k
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Hi all, my question is how to perform a T2 measurement of 13C liquid NMR spectra in BRUKER AVIII ? What sequence to use?...
TiagoB 5 Feb 19 '14 at 04:23

Relaxation time of adenine H2

1 0 2k
answers votes views
Could anyone tell the reason why adenine h2 has a longer T1 and T2 than the other prontons in nucleic acid? It would be ...
yuan 1 Jan 13 '13 at 22:36

1H t2 measurement in solid state nmr

1 0 4k
answers votes views
How to measure t2 of 1H in solid state nmr? we use saturation burst followed by cp to measure T1 of 1H in solid state in...
Ulrich Haunz 210 Mar 05 '12 at 03:34

T1 Rho relaxation

2 0 7k
answers votes views
I am looking for some guidance on researching T1rho relaxation. Does anybody have updated information or references to e...
Alexey Potapov 21 Oct 15 '11 at 04:56

13C quaternary centers in amino acids

2 0 4k
answers votes views
I've got a sample of about 5mg of an amino acid that is the final product of a a synthesis. Due to the long relaxation t...
Matthew Revington 41 Sep 06 '11 at 09:04

About paragnetic impurities, inorganic salts, bad workups, etc. and their impact on small-molecule NMR spectra

2 1 17548
answers votes views
I sometimes face the challenge of explaining to my organic chemists that, even if no impurity signals are visible in the...
djh 1 Aug 11 '11 at 03:19

Can correct TAUc be a sufficient evidence of the absence of aggregation?

2 0 5k
answers votes views
Hello! I am studying the protein backbone dynamics using the standard set of NMR relaxation parameters (R1, R2, NOE). ...
Yoan Monneau 136 Jul 01 '11 at 03:52

Best Relaxation delay 3D NMR

1 1 5k
answers votes views
Dear NMR WIKIers I prefer to measure best relaxation delay for 3D nmr experments by giving array ( like 0.5 , 0.6 , 0....
sri 71 May 24 '11 at 02:44

How to study polymer degradation by gamma and X-Ray radiation?

0 1 3k
answers votes views
Hi, I was asked to study polyethylene degradated by gamma and Xrays. I planed to measure relaxations rates, but which on...
Evgeny Fadeev 5771 Mar 16 '11 at 08:10

Relaxation editing vr paramagnetic relaxation enhancement experiments - 13C CP-MAS NMR

1 1 6k
answers votes views
I am a beginner in NMR spectroscopy and I would like to learn more about relaxation editing experiments vs PRE. A collea...
bmoret42 11 Jan 25 '11 at 12:29

Does anyone know something about paramagnetic relaxation enhancement (PRE)?

5 1 27436
answers votes views
Does anyone know something about paramagnetic relaxation enhancement (PRE)? i would like to try this method on my cellul...
Bharathwaj 112 Oct 19 '10 at 08:48

Chemical Potential By NMR

3 2 4k
answers votes views
New to NMR, but a coworker mentioned that it may be possible to obtain chemical potential for a solution (polymer in sol...
SankarampadiAravamudhan 91 Oct 13 '10 at 19:50
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