[Ifeffit] How to identify N and O atoms in the first coordinate
eunsuk1986 at hotmail.com
Sat Dec 20 01:02:44 CST 2008
I think that it is impossible to distinguish nitrogen with oxygen by using EXAFS. I would like to recommend XANES for your study.
The shift of pre-edge of XANES shows how the oxidation state of metal is changed.
As you know, If there are nitrogen atoms in substitute for oxygen atoms around metal, the pre-edge of metal xanes may shift to high energy because the oxidation state increases.
> From: mzhu at udel.edu> To: ifeffit at millenia.cars.aps.anl.gov> Date: Fri, 19 Dec 2008 16:20:39 -0500> Subject: [Ifeffit] How to identify N and O atoms in the first coordinate> > Hello all,> Merry Christmas!> I have some samples of heavy metal sorption on bacterial biofilm. I want to figure out what elements are coordinated with the heavy metal in the first coordinate. Since the oxygen and nitrogen have similar scattering factors, how can I differetiate them? Using shell-by-shell fitting or linear combination fitting with standards? Thanks.> > Best wishes,> > Mengqiang Zhu > > > > > > > > -----------------------> Mengqiang Zhu> Ph.D Candidate > Environmental Soil Chemistry> Department of Plant and Soil Sciences > University of Delaware> 152 Townsend Hall> Newark, DE 19716 > http://ag.udel.edu/soilchem/zhu.html > _______________________________________________> Ifeffit mailing list> Ifeffit at millenia.cars.aps.anl.gov> http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit
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