A novel chemical ionization reagent ion for organic analytes: the aquachloromanganese(II) cation [ClMn(H2O)+ |
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Authors: | Gqamana Putuma P Duan Penggao Fu Mingkun Gallardo Vanessa Kenttämaa Hilkka I |
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Affiliation: | Purdue University, Department of Chemistry, 560 Oval Drive, West Lafayette, IN 47907, USA. |
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Abstract: | The reactivity of ClMn(H(2)O)(+) towards small organic compounds (L) was examined in a Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometer. The organic compounds studied are aliphatic and aromatic alcohols, aliphatic amines, ketones, an epoxide, an ether, a thiol and a phosphine. All the reactions lead to the formation of the ClMn(H(2)O)(L)(+) complex, which dissociates by loss of the H(2)O molecule. In general, the reactions were found to occur with high efficiencies (>85%), indicating them to be exothermic. Electron transfer was also observed between ClMn(H(2)O)(+) and compounds with low ionization energies (IE), to form the molecular ion (L(+?)) of the analyte. Based on these observations, the IE of ClMn(H(2)O)(+) is approximated to be 8.1?±?0.1 eV. Thus, the utility of ClMn(H(2)O)(+) as a chemical ionization reagent in mass spectrometry is expected to be limited to organic compounds with IEs greater than 8 eV. |
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