科研成果
| 论文编号: | DOI:10.1016/j.jasms.2008.06.003 |
| 第一作者所在部门: | 天然产物研究中心 |
| 论文题目: | Electrospray Mass Spectrometry and Tandem Mass Spectrometry of Bimetallic Oxovanadium Complexes |
| 作者: | 吴志军 |
| 全部作者: | Zhi-Jun Wu,Xiao-Ying Xu, Shi-Wei Luo, Dong-Mei Fang,Guo-Lin Zhang |
| 论文出处: | |
| 刊物名称: | Journal of the American Society for Mass Spectrometry |
| 年: | 2008 |
| 卷: | 19 |
| 期: | 9 |
| 页: | 1247-1254 |
| 联系作者: | 吴志军 |
| 收录类别: | |
| 影响因子: | 3.181 |
| 摘要 : | A series of six bimetallic oxovanadium complexes (1–6; only one was purified) were investigated by electrospray quadrupole time-of-flight tandem mass spectrometry (ESI-QTOFMS/MS) in negative-ion mode. Radical molecular anions [M].- were observed in MS mode.Fragmentation patterns of [M].-were proposed, and elemental compositions of most of the product ions were confirmed on the basis of the high-resolution ESI-CID-MS/MS spectra. A complicated series of low-abundance product ions similar to electron impact (EI) ionization spectra indicated the radical character of the precursor ions. Fragment ions at m/z 214, 200, and 182 seem to be the characteristic ions of bimetallic oxovanadium complexes. These ions implied the presence of a V–O–V bridge bond, which might contribute to stabilization of the radical. To obtain more information for structural elucidation, three representative bimetallic oxovanadium complexes (1–3) were analyzed further by MS in positive-ion mode. Positive-ion ESI-MS produced adduct ions of [M + H]+, [M + Na]+, and [M + K]+. The fragmentation patterns of [M+Na]+ were different than those of radical molecular anions [M].- . Relatively simple fragmentation occurred for [M + Na]+ , possibly due to even-electron ion character. Negative-ion MS and MS/MS spectra of the hydrolysis product of Complex 1 supported these finding, in particular, the existence of a V–O–V bridge bond. |
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