کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5134222 1492214 2017 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Do protons recombine with O2− and CO2− in water clusters?
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Do protons recombine with O2− and CO2− in water clusters?
چکیده انگلیسی


- Uptake of HCl as well as HNO3 by gas-phase clusters O2‐(H2O)m and CO2−(H2O)m is efficient.
- Products Cl‐(HCl)n(H2O)m and NO3‐(HNO3)n(H2O)m are observed, which result from proton transfer in the cluster.
- The most plausible neutral products are HO2 and HOCO.
- These assignments are consistent with literature thermochemistry.

Gas phase reactions of O2−(H2O)m and CO2−(H2O)m with HCl as well as HNO3 are studied by Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometry. HCl and HNO3 are efficiently taken up by the clusters. In the reactions of O2−(H2O)m, a characteristic mass change is observed which is consistent with the evaporation of a hydroperoxyl radical HO2, most likely formed via proton transfer to O2−. Using CO2−(H2O)m as the ionic reactant, products indicating the formation of HOCO are hardly observed in the HCl reaction. With HNO3, however, evidence is found for elimination of HOCO, resulting from proton transfer to CO2−, when the clusters have lost almost all water molecules. Thermochemical cycles using literature thermochemistry show that the reactions are exothermic.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Mass Spectrometry - Volume 418, July 2017, Pages 101-106
نویسندگان
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