UW CHEMISTRY NMR

Announcments & Equipment Logs

Hardware

ALERT : GENERAL NETWORK ISSUES PREVENTING NORMAL NMR OPERATIONS

Please note that department wide network related issues prevent any login to any of the NMR instruments. We are feverishly working to resolve this ASAP. As part of this, you might notice that you are not able to reserve any NMR time on the web calendar also. Update will be coming your way. Stay Tuned. […]

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ALERT ! AV300 : SYSTEM DOWN UNTIL FURTHER NOTICE

There is a computer hardware failure that makes the system unusable. While we are energetically working on this,  the system may not be operational before the day is through. Thank you for your patience and understanding. NMR Facility Manager 12/7/18

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ALERT ! AV500 – PROBE SWAP – CHANGE IN SCHEDULE

The original schedule of Probe swap in this instrument has been advanced to today/tomorrow.  Part of the motivation for this is the (good) news that the REVIVED DRX499 is almost ready for full scale deployment within a few days. We are placing a new probehead called TBI-1H,13C {X} – Z gradient in AV500. This probe […]

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ALERT ! AV500 : IMMINENT PROBE CHANGE NEXT WEEK

The BBO probe will be installed and tested and hopefully be ready by the forenoon of 29th Nov ’18, Thursday. Please take note of this and plan accordingly. NMR Facility Manager 11/29/2018

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AV700 and DRX499 UPDATE : PLEASE READ – SOLUTIONS TO SOLIDS TRANSITION – PLANS

The AV700 NMR spectrometer will be receiving a new Solid State MAS NMR probehead within the next few weeks.  I will announce the finer details of this piece of equipment later. Please note that, currently the instrument is transitioned to solid state NMR mode to confirm its functionality before the new probehead is installed and […]

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ALERT ! AV500 – TOPSHIM GLITCH

Topshim may tend to fail for low sensitivity lock solvent such as CDCl3, but it will work fine with solvents such as C6D6, CD3CN or MeOD-d4.   We will be looking to resolve this by engaging the instrument in an intermittent fashion to minimize down time. An update will be posted once the issue is fully […]

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ALERT ! AV500 – PROBE CHANGED TO TXO- 1H {19F, 13C}

Since the existing BBI probe had suffered a breakage in the VT dewar assembly, we were compelled to abruptly change the probehead to TXO- 19F probe. There was an original plan to do this probe swap by next week, in any case. Once the probe vitals are checked it will be released for regular use. […]

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UPDATE ! AV300 : SYSTEM BACK TO NORMAL

1H ACQUISITION Works as expected.  Pulse width is already optimized. If you are in doubt you should run command “getprosol”. X ACQUISITION (13C, etc.) Works as expected.  You might notice an increased noise level if you happen to run the spectrum on a previous sample for which you have data and compare it.   The 90 […]

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UPDATE ! AV300 : ONGOING HARDWARE INVESTIGATION

Backdrop : We found a faulty RF circuit board serving the 1st channel of this instrument about a week ago but it had not completely stopped working.  A swap of this unit with an identical 2nd unit was done to keep the instrument working at least for 1H observe. Current status : Notwithstanding this, the […]

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AV500 NOTE : TOPSHIM IS WORKING AGAIN

Based on several user samples tested as well as a few standards I tried myself,  the Topshim program is working as expected.   Please go ahead and try it yourself and give a feedback if it fails on your sample.  If a failure occurs, please provide as many details as possible, such as the solvent used, […]

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