Dear AMMRLers,
I've started to look at 35Cl NMR of chlorides (Cl-) of same organic
salts. First thing was calibration, and I found that 1M NaCl should be
made 0 ppm. Now, I made a sample with 1M NaCl in D2O in an insert and a
1M NaCl in H2O in the tube, locked, shimmed, etc., etc., and I see a
peak at '0' (i.e., dead on the carrier) for [Cl-] in H2O and one 5 ppm
upfiled for the [Cl-] in D2O. I was kind of surprised by the big
change, which I suspect comes fom a different solvation shell for the
[Cl-] in regular versus deuterated water. Anyone has seen something
like this? I know there is a BASIC explanation for it, but I'm lazy and
don't want to go find it in the literature...
TIA,
Guillermo
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Guillermo Moyna, PhD
Assistant Professor of Chemistry
Department of Chemistry & Biochemistry
University of the Sciences in Philadelphia
600 South 43rd Street
Philadelphia, PA 19104-4495
"The only existing things are atoms and empty space.
All else is mere opinion" - Democritus, 370 B.C.
Office: Griffith Hall 360
Phone: (215) 596-8526
Fax: (215) 596-8543
e-mail: g.moyna_at_usip.edu
WWW:
http://tonga.usip.edu/gmoyna/index.html
http://www.usip.edu/chemistry/faculty/moyna.asp
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Received on Tue Oct 05 2004 - 19:08:43 MST