This is really fascinating. There are three positively charged nitrogen atoms, but in one IL, two N atoms share 1 charge in resonance, in the other IL, the N atom has a full charge. That changes the ratio of + charged N atoms to 1 charged atoms by 2x (or 1/2) in the two ILs. If I have that wrong, please correct me. I'd actually solve this with two peaks only, and use algebra (solving a system of equations) to map the XPS data back to the two mixtures. This approach would validate Neal's approach. It is very elegant work.
There are potentially three given the structure for the ion with two N but it is not possible to resolve these two N 1s states so the positive ion is represented with one component with twice the intensity compared to the negative ion. There are more thoughts about this sample and video within the pdf www.casaxps.com/casaxps-training/bgn_course/IonicLiquid_N1sPeakModel.pdf.
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This is really fascinating. There are three positively charged nitrogen atoms, but in one IL, two N atoms share 1 charge in resonance, in the other IL, the N atom has a full charge. That changes the ratio of + charged N atoms to 1 charged atoms by 2x (or 1/2) in the two ILs. If I have that wrong, please correct me.
I'd actually solve this with two peaks only, and use algebra (solving a system of equations) to map the XPS data back to the two mixtures. This approach would validate Neal's approach. It is very elegant work.
Hi there,
I am a bit confused. Didn't you say that there should be 3 different species for the N cations?
There are potentially three given the structure for the ion with two N but it is not possible to resolve these two N 1s states so the positive ion is represented with one component with twice the intensity compared to the negative ion. There are more thoughts about this sample and video within the pdf www.casaxps.com/casaxps-training/bgn_course/IonicLiquid_N1sPeakModel.pdf.