You can make the lanthanide chemists and all those who are
interested in learning more about water exchange kinetics very
happy if you can do europium NMR. You can do europium EPR
instead. The reason for this is that europium is paramagnetic!!
In fact, Eu(II) is like using gadolinium(III) with 7 unpaired
electrons, a strong line-broadening agent. You used Eu(III)
nitrate solution, which is also paramagnetic.
Hope this helps you.
Regards,
Sandip
SANDIP K. SUR
1647 Townwood Court
Charlottesville, VA 22901
Tel.: (804) 978 4925
Email: sks2a@virginia.edu
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I had a post-doc come to me who _very_ much wants to do Europium
(solid-state) NMR. A quick look at the specs looked encouraging:
Al-27 Eu-151
spin 5/2 5/2
freq.(300) 78 74
abund. 100 48
Since Al-27 is so easy to see, I threw in an Eu nitrate solution.
Nothing. Lots of nothing. Reasonable sweepwidths, wide
sweepwidths, very
wide sweepwidths. No "peaks" that weren't present with no
sample as well.
A closer look as specs found:
elec. quad. moment: AL-27 0.149 Eu-151 1.16 A brief
tour of the literature found very few papers on Europium NMR, and
they were at lHe temps and low or zero field.
Does anyone know of any literature on observing europium?
Thoughts on
the possibility of even _observing_ a species with this large a
quad.
moment?
Thanks,
Karen Ann
Karen Ann Smith karenann@unm.edu
Manager, NMR Facility Adj. Asst. Prof.
Dept. of Chemistry Clark Hall
University of New Mexico Albuquerque, NM 87131
505.277.4031 url: http://www.unm.edu/~karenann
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