UW CHEMISTRY NMR
Announcments & Equipment Logs
Usage
ATTENTION ! – USERS WHO EMPLOY J-YOUNG NMR TUBES…PLEASE READ !
J-Young NMR tube users must be fully aware by now that tubes that are bent from being perfectly linear cannot be ejected comfortably and they can even cause breakage inside the NMR probehead. Most of the time, the stuck tube entails complete removal of the probe from the magnet, followed by a not so simple […]
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AV700 : SOLUTIONS TO SOLIDS TRANSITION COMING UP – Dec 8
We will switch the AV700 to solids NMR beginning December 8th, Thursday and the system will serve the solids request queue until the end of December as per current estimates. Based on how the runs pan out, we may be in a position to switch back to solutions even earlier. Please look out for a […]
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UPDATE ! AV301 – PROBE READY ; ATMA and TOPSHIM ARE BACK !
You can just type ‘topshim‘ AFTER locking on the solvent to shim. You can also click on the Topshim button on top right area of the Topspin window. Please use the ‘atma‘ command for tuning/matching probehead. When in doubt, always type ‘getprosol‘ to get the correct probe related parameters loaded for your experiment. Please feel […]
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UPDATE ! AV300 – PROBE IS FIXED AND READY FOR REGULAR USE !
The broken glass components inside the probe has led to the tuning/matching issues, which is taken care of now. If you had noticed difficulty in shimming in the past as well as a longer than usual pulse width, those are related to this internal mishap as well. The system is tested to be stable and […]
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ALERT ! AV301 : PROBEHEAD DAMAGE – BACKUP PROBE CHANGE UNDER WAY
RF coils inside the PABBI probehead have sustained the brunt of shearing forces and the cause is not clear and being investigated. The probe will be sent for repairs to Bruker, the manufacturer. The backup probe that will go in place currently will be TXD-1H{19F,13C} triple resonance probe. NOTE : THIS PROBE IS NOT AN […]
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ALERT ! POSSIBLE NETWORK ISSUES SLOWING DOWN NMR COMPUTERS !
We are aware of the facility wide network slow down that makes login and regular use difficult. We are looking into it. Please wait for further update before you plan to start the runs. Your unused times will be waived of any charges. NMR Facility Manager 5/23/16
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UPDATE ! AV500 – OPEN FOR USE AGAIN – NOTE PROBE CHANGE
Please note that the probe that has been pu in is the BBO with Z-gradient. General: Similar to the BBI probe, you use the rotary tool to tune 1H channel. For the X-channel i.e. 13C, 31P, etc., you use the slider tool. Please be gentle with both of them. If this probe breaks in short […]
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GENTLE REMINDER : PAY FOR YOUR NMR TIME BEFORE USING !
Our NMR facility is a collective enterprise and we all have tacitly agreed to play fairly and by the rules, when we got the access privilege. So, how much ever urgent your need is or however ‘quick and short’ a run will be, you are doing a disservice to your fellow researchers, if you simply […]
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AN APPEAL ! – PROPER USE OF NMR TIME
Many users have pointed out in the recent past that NMR times get booked on instruments but they simply go unused. Though this is something difficult to police on a day to day basis, I did stumble upon such a sample occurrence today. On the one hand, I am very happy that our NMR facility […]
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UPDATE ! DRX499 – WHAT WENT WRONG WITH THE PROBE ?
First of, the good news is that 13C channel of the probe is made to work normally after fixing the following problem. Here is a snap shot of the wobb : The 13C channel tune was broken, most probably because of excessive force used on the 13C tuning rod. We have been appealing to the […]
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