For what it's worth, our ~5 year-old Bruker 5mm BBFO probes on our 400 and 500, although stated as tuning in the range 31P to 15N, actually tune comfortably well beyond that, and we have successfully run 205Tl down to 101Ru. Our older BB probes cannot get this range. It may be worth checking the tuning range on any BB probes you may have in your labs.
Of course, you could probably buy a dedicated low-gamma probe with the amount of Rhodium you need to have in a standard 5mm probe to get a decent signal.
Cheers,
Ian
Dr IAN LUCK
NMR Facility | School of Chemistry
THE UNIVERSITY OF SYDNEY
T +61 2 9351 2851 | F +61 2 9351 3329 | M +61 415 798 953
From: Jeffrey H Simpson [mailto:jsimpson_at_mit.edu]
Sent: Friday, 18 November 2016 2:28 AM
To: ammrl_at_ammrl.org
Subject: AMMRL: low gamma probe?
Hi All,
I have been contacted by a researcher who wants to observe Ruthenium-101 or maybe Ruthenium-99 (the 101 isotope has a higher receptivity), but none of the probes in any of my seven NMRs can tune that low. The Frequency of 101Ru is 5.17% that of 1H, and the frequency of 99Ru is 4.61%. Does anybody have, for example, a 400 with a low-gamma probe that will tune to 18.46 MHz (99Ru) or 20.69 MHz (101Ru)?
Any help is appreciated. I think there are just a couple of samples that could be sent.
Jeff
Received on Thu Nov 17 2016 - 11:01:32 MST