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Ring Current Effects: Factors Affecting the NMR Chemical Shift of Molecules Adsorbed on Porous Carbons
Open accessAbstract
Nuclear magnetic resonance (NMR) spectroscopy is increasingly being used to study the adsorption of molecules in porous carbons, a process which underpins applications ranging from electrochemical energy storage to water purification. Here we present density functional theory (DFT) calculations of the nucleus-independent chemical shift (NICS) near various sp 2 -hybridized carbon fragments to explore the structural factors that may affect the resonance frequencies observed for adsorbed species. The domain size of the delocalized electron system affects the calculated NICSs, with larger domains giving rise to larger chemical shieldings. In slit pores, overlap of the ring current effects from the pore walls is shown to increase the chemical shielding. Finally, curvature in the carbon sheets is shown to have a significant effect on the NICS. The trends observed are consistent with existing NMR results as well as new spectra presented for an electrolyte adsorbed on carbide-derived carbons prepared at different temperatures.
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Cites
Nucleus-Independent Chemical Shifts: A Simple and Efficient Aromaticity Probe
Schleyer, P. V. R., Maerker, C., Dransfeld, A., Jiao, H., & van Eikema Hommes, N. J. R. (1996) · Journal of the American Chemical Society · doi:10.1021/ja960582d · Cited by 6,210
Nucleus-Independent Chemical Shifts (NICS) as an Aromaticity Criterion
Chen, Z., Wannere, C. S., Corminboeuf, C., Puchta, R., & Schleyer, P. V. R. (2005) · Chemical Reviews · doi:10.1021/cr030088+ · Cited by 3,847
Cited by
Mechanistic insights into sodium storage in hard carbon anodes using local structure probes
Stratford, J. M., Allan, P. K., Pecher, O., Chater, P. A., & Grey, C. P. (2016) · Chemical Communications · doi:10.1039/c6cc06990h · Cited by 359
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Metadata
- Authors
- Forse, A. C., Griffin, J. M., Presser, V., Gogotsi, Y., & Grey, C. P.
- Venue
- The Journal of Physical Chemistry C
- Publisher
- American Chemical Society (ACS)
- Published
- 2014-03-28
- Volume
- 118
- Issue
- 14
- Pages
- 7508-7514
- ISSN
- 1932-7447 (ISSN-L)
- 1932-7455
- OpenAlex
- W2335650612
- Cited by
- 160
- References
- 2
- FWCI
- 4.63
- Type
- journal article
- Language
- en
- Open access
- green
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- Forse, A. C., Griffin, J. M., Presser, V., Gogotsi, Y., & Grey, C. P. (2014). Ring Current Effects: Factors Affecting the NMR Chemical Shift of Molecules Adsorbed on Porous Carbons. The Journal of Physical Chemistry C. https://doi.org/10.1021/jp502387x
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