All,
I see not much difference in a HMAC vs unadorned HMBC
90H-1/2J-alphaX-t1/2-180(H)-t1/2-alphaX-1/2J-acq
with alphaX being an arbitrary flipangle pulse on X. The
shorter the pulse the wider you can make the spectrl width
in the indirect dimension.
Clemens
On 8/31/2023 4:30 PM, Vander Velde, David wrote:
No, but the unadorned HMBC will reward you with some signal even if your initial
estimates for pulse width and J turn out to be quite bad. I think it's very helpful
in that regard that the number of pulses in the sequence is so small. The level of
optimization is a matter of personal preference.
________________________________
> From: main_at_ammrl.groups.io<mailto:main_at_ammrl.groups.io> <main_at_ammrl.groups.on behalf of Walter Massefski
> Sent: Thursday, August 31, 2023 12:47 PM
> To: main_at_ammrl.groups.io<mailto:main_at_ammrl.groups.io>
> Subject: Re: [AMMRL] Y89 measurement
Clemens usually recommends HMQC (either 1H or 31P) for low-gamma work - have
either of you done the comparison with HMBC for various systems?
Best,
Walt
On Aug 31, 2023, at 1:06 PM, CHARLES G FRY via groups.io <fry=chem.wisc.e=
du_at_groups.io><mailto:fry=chem.wisc.edu_at_groups.io> wrote:
I was about to respond similar to Dave's email stating that getting to low
gamma nuclei via 1H (and perhaps 31P) HMBC has been the most successful
route we've used. The combination of polarization enhancement and T1 savings
is very powerful and makes many of our studies viable that otherwise would
not have been. 103Rh and 183W are just a couple of other nuclei we've had
1H-X successes with, in addition to 89Y.
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Received on Thu Aug 31 2023 - 13:59:12 MST