Hi all
after all these excellent references about shimming it is time for something lighter.
Q: What is the second most boring thing in the lab.
A: Shimming
Q: What is the most boring
A: Watching someone shim.
Now thanks to:
P.C. van Zijl, S. Sukumar, M. O'Neil Johnson, P. Webb, R.E. Hurd, Optimized
shimming for high resolution NMR using three-dimensional image-based field
mapping, J. Magn. Reson. A 111 (1994) 203-207.
and
Markus Weiger, Thomas Speck, Michael Fey, Gradient shimming with spectrum
optimisation, Journal of Magnetic Resonance, Volume 182, Issue 1, 2006, Pages 38-48
we no longer need to watch someone shim.
Best regards
Clemens
On 7/25/2025 8:02 AM, Craig Grimmer via groups.io wrote:
Dear All
On the topic of shimming, Gerald Pearson's article can be found at this URL:
https://nmr.medicine.uiowa.edu/sites/nmr.medicine.uiowa.edu/files/2023-12/Shimming*20an*20NMR*20Magnet.pdf
Kind regards,
Craig.
On Thu, 24 Jul 2025 at 16:48, Ana Ferreira via groups.io wrote:
Dear all
Following Bob Berno post, those papers are very usefull, particularly the
supplementary information that as the infirmation divided by deuterated solvent.
Also there was a more recent paper in OPR& that expanded the list. "NMR Ch=
emical Shifts of Trace Impurities: Industrially Preferred Solvents Used in =
Process and Green Chemistry"
https://pubs.acs.org/doi/10.1021/acs.oprd.5b00417
Best
Ana Sofia D. Ferreira, Ph.D.
Chemistry Department, Faculty of Sciences and Technology,
Universidade Nova de Lisboa
2829-516 Caparica, PORTUGAL
E-mail: asd.ferreira_at_fct.unl.pt<mailto:asd.ferreira_at_fct.unl.pt>
On Thu, 24 Jul 2025, 14:47 Bob Berno via groups.io wrote:
Hello David,
I was very excited to hear that the Concepts archive is now open access. Years
ago I'd scanned the Ancient Art of Shimming article from Alex Bain's hard copy
of the issue, so I was looking forward to having an official PDF copy. But
when I clicked the PDF download link you sent, I was informed that my institution
does not provide access to this content. I think our library's access only
starts in the mid-1990s.
For the synthetic chemistry groups, I have two related papers that I think
are worth mentioning:
"NMR Chemical Shifts of Common Laboratory Solvents as Trace Impurities" J.
Org. Chem. 1997, 62, 7512-7515 and
"NMR Chemical Shifts of Trace Impurities: Common Laboratory Solvents, Organics,
and Gases in Deuterated Solvents Relevant to the Organometallic Chemist"
Organometallics 2010, 29, 2176–2179
The 1997 JOC paper is an excellent resource for the average organic chemist=
, but the updated version in 2010 has a much more expanded list of common r=
eagents and solvents that you will see in the typical NMR spectrum from a s=
ynthetic chemistry group. I tell students to actually PRINT the tables of =
1H and 13C chemical shifts and post these tables above their desk for quick=
reference.
Cheers,
Bob.
On 2025-07-23 2:51 p.m., David Rovnyak via groups.io wrote:
Quick tip: as libraries reduce their physical holdings, ask your library for
the hard copies of the Concepts issues before they get discarded.
The Concepts archive is largely open access at:
https://onlinelibrary.wiley.com/loi/6471
Quick link to the Keifer article:
https://onlinelibrary.wiley.com/doi/10.1002/*28SICI*291099-0534*281999*2911*3A3*3C165*3A*3AAID-CMR4*3E3.0.CO*3B2-D
And the ancient art of shimming:
https://onlinelibrary.wiley.com/doi/10.1002/cmr.1820020303
-David
--------------------------------------------------------------------------
David Rovnyak,
Professor of Chemistry,
Bucknell Univ.,
Lewisburg, PA 17837
BlueSky : NMR_Guy<https://bsky.app/profile/nmrguy.bsky.social>
Research: http://www.facstaff.bucknell.edu/drovnyak/
Bucknell Chemistry: http://www.departments.bucknell.edu/chemistry/
Pascal: "I would like to have written a shorter letter, but I didn't have the time"
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-- Dr. Bob Berno Manager,
NMR Facility
McMaster University,
ABB-156 1280 Main St.
West Hamilton, ON L8S 4M1
--
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Bruker BioSpin NMR Applications & Training
15 Fortune Drive NEW Phone: 978-313-5NMR(5667)
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