T2 relaxation in solids

0 0 61
answers votes views
Hi, While the T2 relaxation in liquids is connected with motional correlation time (tauc), what's the source of T2 rela...
Posted: Frey 61 Jun 14 at 20:01

recovery of solvent NMR

1 0 245
answers votes views
Hi Do you confirm recovery of NMR solvents? Thanks ...
Updated: sattar saberi 1 Jun 14 at 05:48

15N-proline site specific labeling

0 0 70
answers votes views
Can anyone share a protocol for site specific 15N-proline labeling of proteins? Would I need to supplement the media wit...
Posted: eliasjf 1 May 29 at 11:44

Calculate the resonance frequency of hydrogen nucleus in an applied field of 2.4 T if ßN = 5.05 x 10-27 JT-1 and g = 5.585.

0 0 300
answers votes views
Calculate the resonance frequency of hydrogen nucleus in an applied field of 2.4 T if ßN = 5.05 x 10-27 JT-1 and g = 5.5...
Posted: mala ramanji 1 May 24 at 06:24

What do you call this sequence

0 0 165
answers votes views
I'm looking for the name of this sequence. It's a bit like the 1H portion of INEPT, but its purpose is not to transfer ...
Updated: clemistry 1 May 15 at 10:36

Bruker phase image recon

0 0 269
answers votes views
Hi all- I'm acquiring 1-2s/dynamic, single-slice gradient echo image series over a period of 10 minutes or so. By defau...
Posted: Nicholas E 11 Apr 17 at 08:35

dept nuclear magnetic resonance

1 0 381
answers votes views
what it the difference between c13 and dept nmr? ...
Posted: dereje sharew 1 / Updated: gravatar 83 Apr 28 at 02:51

Bruker AV500 TOPSHIM error

1 0 337
answers votes views
Hi, I'm having a problem with topshim on Bruker AV 500 using topspin 2.1. it finishes with error (topshim: FieldMap - no...
Posted: jrlopez 1 / Updated: Jim Lin 1 Apr 14 at 06:23

nmr phenylethylamine

2 0 295
answers votes views
hello...i know only the basics on nmr and need some help :i need H-NMR help with phenylethylamine Phe-CH2-CH2-NH-R - how...
Posted: ann choroshun 1 / Updated: Jim Lin 1 Apr 09 at 07:59

Distorted/antiphase signals when doing Dosy

5 0 278
answers votes views
Hello, I am running Dosy experiment using ledbpgp2s sequence. I am getting sort of signal distortions. I tried the solu...
Posted: Umayal Rakesh 1 / Updated: gravatar 83 Jun 08 at 03:44

31P-31P COSY

1 0 387
answers votes views
I like to run a 31P-31P COSY experiment to determine whether there is coupling between 1R-31P-CH2-31P-X in my molecule. ...
Updated: Jim Lin 1 Apr 09 at 07:54

splitting QCPMG echo train

0 0 137
answers votes views
Hi all, I'm running qcpmg (qcpmgaq), using bruker topspin3. Does anyone have a suggestion how to split the echos train? ...
Posted: shon roni 1 Mar 23 at 04:07

How to calcualte eoors in ppm from Hz of Hsqc data?

1 0 228
answers votes views
Hi all, I want to calculate error in ppm from my Hsqc data. My spectrometer yields X1axis, Y1Axis, DX1, DY1, X1ppm, and ...
Posted: ick lad 1 / Updated: Arkadiusz Leniak 238 Mar 17 at 02:10

Why NMR can deliver angstrom reolution structures.

1 0 249
answers votes views
How can NMR operating at radiofrequency wavelengths deliver angstrom resolution? For example X-ray crystallography opera...
Posted: Anon 1 / Updated: Arkadiusz Leniak 238 Mar 17 at 01:10

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

3 0 927
answers votes views
Hi, I have encountered a strange behaviour of some signals (they are absent) in a series of polycyclic aromatic carboxi...
Posted: Arkadiusz Leniak 238 / Updated: zablociak 21 Mar 23 at 12:11

reading Bruker phase data

1 0 210
answers votes views
Hi all, I'm having trouble reading the 2dseq file for a scan I ran. It should contain 2 slices of 66x50 voxels, repeate...
Updated: Nicholas E 11 Mar 13 at 10:53

WaterLOGSY pulse program for bruker

1 0 650
answers votes views
Hello, I was wondering if there was a waterLOGSY sequence among the bruker sequences. If not, could someone tell me whe...
Posted: gravatar 83 / Updated: Arkadiusz Leniak 238 Mar 17 at 08:09

OH, NH, SH Labile protons in water nmr

1 0 403
answers votes views
Hello all, Just to mirror Craig Grimmer's question about labile protons in non-aqueous solvents, does anyone know of an...
Posted: gravatar 83 / Updated: Arkadiusz Leniak 238 Mar 14 at 11:24

Mechanism of chemical exchange between labile protons (OH, NH, SH)

1 0 308
answers votes views
Hello All Does anyone know of any good articles dealing with the mechanisms of labile proton exchange in non-aqueous so...
Posted: Craig Grimmer 41 / Updated: gravatar 83 Mar 09 at 02:28

Topshim error

2 0 351
answers votes views
HELLO all nmr wikier,I am facing problem in runing topshim on bruker 500Mhz using topspin 2.1 it finishes with error (fi...
Posted: feroon 21 / Updated: Jim Lin 1 Mar 31 at 06:19

noisy hmqc and hmbc spectra

2 0 374
answers votes views
Hey all! We've got a serious problem because with our new probe (5mm bbo bruker) the t1 noise in the heteronuclear corr...
Posted: apophis 1 / Updated: Pete Gierth 401 Feb 25 at 14:06

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

1 0 300
answers votes views
Hi, Most people tend to use a lower d1 for 2D than for 1D. Help me understand why. Furthermore, supposing you know you...
Updated: gravatar 83 Mar 09 at 02:21

log: Failed to find Z0 - low s/n

2 0 259
answers votes views
Hi, everybody! I met a problem on Varian 400 MR: DMSO samples don't lock by "find Z0" button, but I can find lock signal...
Posted: Ilya N 1 / Updated: Ulrich Haunz 247 Mar 09 at 09:18

Coherence transfer pathway for Magic sandwich echo

0 0 519
answers votes views
Hi, I am writing the pulse sequence for magic sandwich echo*, but I am stuck with the phase cycle since I don't have a ...
Updated: Traveller 1 Feb 15 at 15:59

Any decent nmr processing software for free?

5 0 463
answers votes views
Hello people, Does anyone know of any free NMR software (no trials, I can't stand it anymore) that is robust enough to ...
Posted: gravatar 83 / Updated: Craig Grimmer 41 Mar 05 at 01:45

Parameters for zgesfpgp 1d experiment (flipback watergate) on Bruker

1 0 427
answers votes views
Hi , Does any one know how to set up the zgesfpgp 1d experiment (flipback water gate) on Bruker. I am looking for p29 du...
Posted: sri 71 / Updated: Clemens Anklin 416 Mar 03 at 20:41

building chains of resonance groups from connectivities

0 0 183
answers votes views
Greetings, Given a dictionary of connectivities of the following form: residue i -> possible residues i-1 : 54 -&g...
Posted: Thomas 1 Feb 07 at 11:36

How do I perform a 2D C-13-C-13 spectrum simulation?

0 0 205
answers votes views
I am new to NMR pipe and was wondering how to perform a carbon-13 carbon-13 simulation in NMR pipe? For example, what th...
Posted: epsaliba 1 Feb 06 at 07:28

Can anyone point me towards a waterlogsy tutorial for bruker?

0 0 218
answers votes views
Hello people, It's all in the title. ...
Posted: gravatar 83 Feb 02 at 08:15

adequate NMR

0 0 190
answers votes views
Hi, I am really confused about reading the adequate 1J(CC) results, Can anyone help me with that? What is the differenc...
Posted: Hessen 1 Jan 29 at 14:57

ADC value, help!!!

1 0 226
answers votes views
ADC value in Bruker 1T, please tell me how to get it? ...
Posted: Huong Nguyen 1 / Updated: Ulrich Haunz 247 Feb 09 at 07:37

Measurement of very short T2

1 0 340
answers votes views
Hello, I'm measuring T2 in paramagnetic materials. These values are very short (0.5-5 ms), and I have to use very short...
Posted: A K 1 / Updated: Jeffreyyyy 1 Feb 27 at 12:48

how many percent peak in NH HSQC enough to solve structure?

1 0 484
answers votes views
Hello everyone, I have a stupid question and often confuse me. We often meet peak missing in 15N H HSQC,but usually ho...
Posted: chengkun wang 1 / Updated: sekhar Talluri 611 Feb 14 at 23:21

Predicting aquisition time needed depending on sample concentration

2 0 4k
answers votes views
Hi , is there a way of predicting aquisition time needed depending on sample concentration in order to get a decent spe...
Posted: gravatar 83 / Updated: clemistry 1 May 19 at 14:36

bigger MAS-NMR spectrum as irradiation window

0 0 487
answers votes views
Hi, I have a sample with a very very big CSA which is broader than my irradiation windows, so I have to acquire my dat...
Posted: Thiazole 11 Dec 16 '14 at 13:05

J-value command

2 0 346
answers votes views
Hi I have a 500MHz BRUKER NMR. How I can access to J-value at COSY experiment? what's that command? ...
Posted: Saeed 1 / Updated: PQdotL 21 Dec 16 '14 at 16:12

problem with large dosy files

3 0 440
answers votes views
Hello, I run DOSY expt successfully but my dosy files are very massive and they take up large amounts of disk space. Ho...
Updated: elham 3 Jan 16 at 07:57

Topspin: usage of l0 and d0

2 0 609
answers votes views
Dear all, In topspin, what's the initial value for l0, 0 or 1? what's the initial value for d0, 0 or in0? Thanks in ad...
Updated: Frey 61 Dec 12 '14 at 01:14

1H-15N CSP

0 0 400
answers votes views
I have a basic question. Why or when should one use deviation from average chemical shift change rather than absolute va...
Posted: Mahavir Singh 1 Nov 27 '14 at 05:10

1H-15N HMBC of small molecules

1 0 307
answers votes views
When I used the automatic peak picking function of Topspin for picking the cross peaks in a 1H-15N HMBC spectrum, two cr...
Updated: Bhanu 1 Nov 27 '14 at 20:23

Running a wet sequence

2 0 729
answers votes views
Hi, I am trying to run a wet sequence but I'm having trouble getting good results on a sample with 90:10 water:methanol...
Posted: gravatar 83 / Updated: Pete Gierth 401 Dec 05 '14 at 10:35

coupling constants

3 0 390
answers votes views
Hi, does anybody know 1H-79Br coupling constants? I found in literature only 13C-79Br coupling constants! Thank you, Mar...
Posted: gugica 1 / Updated: Arkadiusz Leniak 238 Dec 07 '14 at 02:28

What is the actual point of dummy scans?

3 0 820
answers votes views
Hi, I was wondering why so many pulse programs use dummy scans. Correct me if I'm wrong but I think dummy scans are supp...
Posted: gravatar 83 / Updated: Pete Gierth 401 Dec 05 '14 at 10:44

Frequency of signal in the second dymension

0 0 2k
answers votes views
Let me consider a proton experiment done on a 500 MHz spectrometer. The signal coming from the sample has a frequency of...
Posted: PQdotL 21 / Updated: dstephenson 56 Dec 16 '14 at 06:27

Inverse FT of NUS data

3 0 532
answers votes views
Does anyone know the way to create a full ser file from Bruker NUS processed data? I want to do this so that others (wi...
Posted: John Hollerton 96 / Updated: Pete Gierth 401 Dec 05 '14 at 11:19

BSMS error message

3 0 550
answers votes views
Hi what is the HOLD LOCK message on BSMS key pad? How can I fix it? Thanks ...
Posted: elham 3 / Updated: Pete Gierth 401 Jan 22 at 02:39

Weak NOE signals, serious t1 noise

5 0 682
answers votes views
Since my university does not have a professional spectroscopist, I am a new learner of NMR, and I really have no one els...
Posted: Elvis 1 / Updated: RuudA 11 Nov 02 '14 at 07:22

Why so much spam?

3 3 437
answers votes views
Hi, I really like this forum and I am harrowed to see it so spammed. We should find a way to end this(maybe more admins...
Posted: gravatar 83 / Updated: Ulrich Haunz 247 Oct 24 '14 at 07:09

19F 2D experiments

3 0 529
answers votes views
Hi, I would like to run some 19F NOESY, and 19F-1H correlation experiments on a totally fluorinated sample (no H) with a...
Posted: AnneBaudouin 1 / Updated: RuudA 11 Nov 02 '14 at 07:44

NH---O hydrgen bond detection in N-(2-methoxyphenyl)benzamide

1 0 4k
answers votes views
I'd like to know if there are further NMR spectroscopic methods to detect NH---O hydrogen bond in N-(2-methoxyphenyl)ben...
Posted: Alessia 1 / Updated: Arkadiusz Leniak 238 Oct 24 '14 at 00:48
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