Gas-Phase Fragmentation of Aluminum Oxide Nitrate Anions Driven by Reactive Oxygen Radical Ligands
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- 作者：Johnny Lightcap ; Thomas H. Hester ; Kurt Kamena ; Rachael M. Albury ; Carrie Jo M. Pruitt ; Daniel J. Goebbert
- 刊名：Journal of Physical Chemistry A
- 出版年：2016
- 出版时间：March 10, 2016
- 年：2016
- 卷：120
- 期：9
- 页码：1501-1507
- 全文大小：386K
- ISSN：1520-5215
文摘
Gas-phase metal nitrate anions are known to yield a variety of interesting metal oxides upon fragmentation. The aluminum nitrate anion complexes, Al(NO3)4– and AlO(NO3)3– were generated by electrospray ionization and studied with collision-induced dissociation and energy-resolved mass spectrometry. Four different decomposition processes were observed, the loss of NO3–, NO3•, NO2•, and O2. The oxygen radical ligand in AlO(NO3)3– is highly reactive and drives the formation of AlO(NO3)2– upon loss of NO3•, AlO2(NO3)2– upon NO2• loss, or Al(NO2)(NO3)2– upon abstraction of an oxygen atom from a neighboring nitrate ligand followed by loss of O2. The AlO2(NO3)2– fragment also undergoes elimination of O2. The mechanism for O2 elimination requires oxygen atom abstraction from a nitrate ligand in both AlO(NO3)3– and AlO2(NO3)2–, revealing the hidden complexity in the fragmentation of these clusters.