UW CHEMISTRY NMR

Users had noticed that the lineshape on this instrument has been rather poor.  This is primarily due to the fact that the magnet is still taking its own time to settle down after the cryoshimming and B0 field adjustment approximately a month ago. Supercon Magnets are notoriously unpredictable when it comes to their expected duration […]

Facilities and services has announced a 2 hour window of compressed air disruption from 5.00 am to 7.00 am on Wedensday, 25th June ’14.  The walk-on users won’t be affected by this event but those who want to plan overnight runs should take note that the VT system will be non-functional during this event.  Please […]

Topshim automatic shimming can be used now on all solvent types.  You can use the following two methods to access this feature : Type topshim gui and bring up the Topshim Graphical User Interface.  If you have correctly locked on the solvent, the system will automatically optimize shims based on your lock solvent.  You just […]

The av500 is now available with the TXO probe. This probe has 1H, 19F, and 13C capabilities with proton decoupling. It is a 5 mm probe, the same TXO you have used on the av500 in the past. Topshim is available on this console with this probe. Follow the instructions posted next to the workstation. […]

Until the user’s sample stuck inside the room tempearture bore of the magnet is removed, the instrument cannot be used.  Please wait for an update after the clean up to complete, before attempting to use the machine again.

All the normal functionalities including atma are restored to their original state.  Users are requested to use the atma command for automatic tuning and matching of the probe.  The optional atmm command is also available, if you so prefer.

Some of the users complained that the ATMA takes unduly long time to finish.  Part of the problem is the large default sweep width used in the user’s dataset, which makes the ATMA command to search long for a solution.  If you encounter this, please do the following : Stop the WOBB by pressing the […]

Please use the reservation system per usual for all time after 10:45 am.

We are aware the instrument reservation online system is down. It is currently being worked on. Until the reservation system is up, you can reserve your NMR time by using the sign-up sheet next to the NMR instrument you want to use.

The AV301 now has the dual channel probe with 1H and 13C and a 2D lock. Please use shim file stdhcd. The proton and carbon macros are not currently set up to reflect the new probe. You will need to tune and match this probe for your experiments.