UW CHEMISTRY NMR
Announcments & Equipment Logs
LAUNCH OF THE BRAND NEW 500 MHZ SYSTEM WITH PRODIGY CRYOPROBE – NEO500
Dear Users Thank you for your patience. We are happy to announce that the LONG AWAITED shiny new NEO500 NMR system is primed and ready for your use for years to come ! Several details about this new system need to be discussed later, but first let us see how you can start […]
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NMR SYSTEMS UPGRADE – ROADMAP – STAGE 2
Dear Users For the sake of continuity, I will provide below the links to the past two posts on our 500 MHz NMR systems upgrade of 2023. https://depts.washington.edu/chemwp/chemwpnmr/2022/11/preparing-for-500-mhz-instrument-upgrades/ https://depts.washington.edu/chemwp/chemwpnmr/2023/02/news-new-500-nmr-system-installation-scheduled-for-next-week/ Current Status : GG500 has moved to its new permanent home. The new system NEO500 installation has completed by the Bruker engineer. The system is […]
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NEWS ! NEW 500 NMR SYSTEM INSTALLATION SCHEDULED FOR NEXT WEEK
Dear Users This is in continuation of the announcement I made sometime ago about the imminent arrival of a brand new 500 MHz NMR spectrometer to our facility. Starting the afternoon of tomorrow, Friday the 3rd, a series of events will take place : The AV500 CONSOLE will be shut down and retired permanently (the […]
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UPDATE ! AV301 : TOPSHIM TEST LOOKS GOOD
Dear Users I managed to get hold of six sample tubes of same compound in CDCl3, (thanks to the kind help from Chem Lab Techs, David and Lance) to test the Topshim consistency. In my experience, the shimming is consistent and reliable. Below is a snapshot of the aliphatic region from all the six samples […]
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UPDATE ! AV301 : TOPSHIM SHOULD WORK WITH WEAK SOLVENTS NOW
Dear Users Thanks to a generous donation of a crucial component from a fellow public University like ours, I could revive the ability for this instrument to do meaningful Topshim based shimming on weak solvents like CDCl3. The results based on the tests I ran on a few samples at my disposal and a few […]
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UPDATE !! AV301 – SYSTEM UP WITH ATMA PROBE, WITH CAVEATS – PLEASE READ
My dear long-suffering and patient NMR users ! The AV301 instrument is available for immediate use. You can use ATMA command to tune 1H nucleus. You can also use either topshim (command line) or topshim gui (graphical interface) to shim on your solvent. Here are the caveats that you should note : The probe’s […]
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PERSISTENT TOPSHIM PROBLEMS – BRIEFLY EXPLAINED…
Dear Users While AV301 instrument has been offline for almost four weeks, you might have also noticed that people complain about Topshim failure on AV500 and AV300. AV301 was taken down to address two complex problems, one is the failure of Topshim with 2H based solvents (i.e. most of the samples used) and a hardware […]
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UPDATE ON AV500 AND GG500
Dear Users : AV500 : We have swapped in the triple resonance TBI-1H {13C,X} probehead. Please take a moment to look at the Summary sheet that is displayed on the console box behind the computer. Please get in touch with one of the facility staff if you have any questions. This probe can perform Topshim […]
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PREPARING FOR 500 MHz INSTRUMENT UPGRADES
Dear Users Recently, some of you might have seen a Post in this space about oncoming instrument Upgrades in the 500 MHz category. Here is a link to that roadmap, in case you missed it. To summarize : Beginning of the New Year 2023 We will be left with two modern 500 MHz spectrometers : […]
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UPDATE – AV301 : REPAIR PARTS ORDERED TO RESURRECT PROBE
Dear Users The consistently poor shim performance and the related failure to lock on a solvent after Topshim, especially for weak solvent signals such as CDCl3 is due to broken parts inside the probehead. Since this is the surrogate i.e. backup probehead, I do not have another backup probehead with Topshim capability to replace it […]
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