Abstract
Mercury-cyclohexylamine (R-NH2, where R = c-C6H11) ions having the composition Hg(R-NH)2H+ can be formed by exposing the surface of Hg(NO3)n=1,2 salts to gaseous primary amines and then sputtering the surface with a primary ion beam (ReO-4). The resultant ions can be stabilized and detected using an ion trap secondary ion mass spectrometer (IT-SIMS) instrument, which provides collisional stabilization that facilitates their observation. Isolation of the Hg(R-NH)2H+ ions followed by collisional activation produces daughter ions corresponding to (C6H10NH2)+and Hg(R-NH)+. These assignments were supported by deuterium labeling experiments, which resulted in the formation of Hg(R-NH)(R-NH-d11)H+ and Hg(R-NH)2H+. The existence of the Hg(R-NH)2 compounds on the surface was verified using Raman spectroscopy, which showed a strong absorption at 590 cm-1 that corresponded to Hg-N stretching. Analogous ions could be formed with n-hexylamine, but no Hg-bearing ions were formed when starting with a secondary or a tertiary amine. This indicates that only primary amines will react with Hg-nitrate surfaces in this manner. Hg-amine ions could not be formed starting with other Hg salts: chloride, iodide, thiocyanate, sulfate, and oxide. These results suggest that surface derivatization using amines, coupled with an IT-SIMS instrument, may offer an approach for determining inorganic metal speciation on surfaces. (J Am Soc Mass Spectrom 1998, 9, 35-41)
| Original language | English (US) |
|---|---|
| Pages (from-to) | 35-41 |
| Number of pages | 7 |
| Journal | Journal of the American Society for Mass Spectrometry |
| Volume | 9 |
| Issue number | 1 |
| State | Published - Jan 1998 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Structural Biology
- Spectroscopy
Cite this
Characterization of bis(alkylamine)mercury cations from mercury nitrate surfaces by using an ion trap secondary ion mass spectrometer. / Groenewold, Gary S.; Appelhans, Anthony D.; Ingram, Jani C.
In: Journal of the American Society for Mass Spectrometry, Vol. 9, No. 1, 01.1998, p. 35-41.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Characterization of bis(alkylamine)mercury cations from mercury nitrate surfaces by using an ion trap secondary ion mass spectrometer
AU - Groenewold, Gary S.
AU - Appelhans, Anthony D.
AU - Ingram, Jani C
PY - 1998/1
Y1 - 1998/1
N2 - Mercury-cyclohexylamine (R-NH2, where R = c-C6H11) ions having the composition Hg(R-NH)2H+ can be formed by exposing the surface of Hg(NO3)n=1,2 salts to gaseous primary amines and then sputtering the surface with a primary ion beam (ReO-4). The resultant ions can be stabilized and detected using an ion trap secondary ion mass spectrometer (IT-SIMS) instrument, which provides collisional stabilization that facilitates their observation. Isolation of the Hg(R-NH)2H+ ions followed by collisional activation produces daughter ions corresponding to (C6H10NH2)+and Hg(R-NH)+. These assignments were supported by deuterium labeling experiments, which resulted in the formation of Hg(R-NH)(R-NH-d11)H+ and Hg(R-NH)2H+. The existence of the Hg(R-NH)2 compounds on the surface was verified using Raman spectroscopy, which showed a strong absorption at 590 cm-1 that corresponded to Hg-N stretching. Analogous ions could be formed with n-hexylamine, but no Hg-bearing ions were formed when starting with a secondary or a tertiary amine. This indicates that only primary amines will react with Hg-nitrate surfaces in this manner. Hg-amine ions could not be formed starting with other Hg salts: chloride, iodide, thiocyanate, sulfate, and oxide. These results suggest that surface derivatization using amines, coupled with an IT-SIMS instrument, may offer an approach for determining inorganic metal speciation on surfaces. (J Am Soc Mass Spectrom 1998, 9, 35-41)
AB - Mercury-cyclohexylamine (R-NH2, where R = c-C6H11) ions having the composition Hg(R-NH)2H+ can be formed by exposing the surface of Hg(NO3)n=1,2 salts to gaseous primary amines and then sputtering the surface with a primary ion beam (ReO-4). The resultant ions can be stabilized and detected using an ion trap secondary ion mass spectrometer (IT-SIMS) instrument, which provides collisional stabilization that facilitates their observation. Isolation of the Hg(R-NH)2H+ ions followed by collisional activation produces daughter ions corresponding to (C6H10NH2)+and Hg(R-NH)+. These assignments were supported by deuterium labeling experiments, which resulted in the formation of Hg(R-NH)(R-NH-d11)H+ and Hg(R-NH)2H+. The existence of the Hg(R-NH)2 compounds on the surface was verified using Raman spectroscopy, which showed a strong absorption at 590 cm-1 that corresponded to Hg-N stretching. Analogous ions could be formed with n-hexylamine, but no Hg-bearing ions were formed when starting with a secondary or a tertiary amine. This indicates that only primary amines will react with Hg-nitrate surfaces in this manner. Hg-amine ions could not be formed starting with other Hg salts: chloride, iodide, thiocyanate, sulfate, and oxide. These results suggest that surface derivatization using amines, coupled with an IT-SIMS instrument, may offer an approach for determining inorganic metal speciation on surfaces. (J Am Soc Mass Spectrom 1998, 9, 35-41)
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M3 - Article
VL - 9
SP - 35
EP - 41
JO - Journal of the American Society for Mass Spectrometry
JF - Journal of the American Society for Mass Spectrometry
SN - 1044-0305
IS - 1
ER -