UW CHEMISTRY NMR
Announcments & Equipment Logs
NMR Applications
UPDATE ! NEO500 – BUDGET NUMBERS ACTIVELY CHECKED FOR ACCURACY
Dear Users Thank you for paying attention to the mandatory entry of your valid budget number when you queue up an experiment on NEO500. To help you with this process, a software plugin of sorts is now activated. When you enter a budget string that is incorrect, you will be alerted with Red font as […]
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UPDATE : AV500 – SHIM SYSTEM TAMED – MOSTLY
Dear Users I mentioned last week that a couple of hardware related issues need addressing and this is an update about the first and foremost of them : getting consistent results from Topshim method of shimming for all Lock Solvents. The root cause for the sporadic failure of Topshim, especially for weak lock signals […]
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UPDATE : GG500 – WORK IN PROGRESS…
Dear Users But for the radio silence from my side due to a week long break I took, I wanted to assure you that I am aware of the bug you all reported about clicking ‘eda’ and the enusing inactive Topspin/IconNMR interface. I am working on this and will update you once a resolution is […]
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UPDATE ! GG-500 IS OPEN FOR BUSINESS !!!
Dear NMR Users ! The long wait is over ! We are proud to present the Latest Additon to our family : GG500 Currently Installed Probe : BBO 1H {X} – Z Gradient (PLEASE NOTE : The 19F capability […]
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TIPS – GETTING THE MOST OUT OF YOUR SHIMS – AV500 AS AN EXAMPLE
The majority of lock solvents used in our facility are fully deuterated i.e. 99.0% or more 2H enriched. This means that the Topshim system performs what is called ‘1D gradient shimming’ or ‘Z-axis only’ shimming. This leaves the job half-done when it comes to shim optimization. The XY-plane or ‘transverse plane’ shims also need adjusting, […]
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(RE)INTRODUCTION OF MYSELF…
Dear NMR users/enthusiasts Although this space was created primarily to communicate about instrument related issues and the progress made to remedy those, in the outset I will warn that this post is an unabashed advertisement of sorts about myself, but within the context of NMR only. In this day and age it makes sense to […]
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ATTENTION USERS ! – SPECIALIZED TRAINING PLANS – PLEASE READ !
Over and above the simple but minimal training that is provided by the facility for the new users, we always recognized the need for training you in some special tasks such as how to properly maneuver the Lock facility or how to Shim by hand when Topshim fails, to site as examples. We are finally […]
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AV700 SOLIDS NMR USAGE : BRIEF CLARIFICATION
Unlike the solutions spectrometers, solid state NMR instrument is not amenable to a walk-on mode of operation, by the very nature of this spectroscopy. First of all, the technique requires the use of an expensive rotor (approx. cost $1000/- ) in place of the NMR tube that costs about $10/-. The sample preparation also needs […]
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AV500 – GRADIENT ASSISTED SHIMMING – Topshim program
Many of you might be aware that the AV500 console acquired the ability to do fully Automatic shimming using the Topshim program from within Topspin. The system uses either 1H or 2H NMR resonance signals to accomplish this along with gradient coils placed in the NMR probe. This means that no matter which lock solvent […]
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