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标题：New Vanadium Compounds in Venezuela Heavy Crude Oil Detected by Positive-ion Electrospray Ionization Fourier Transform Ion Cyclotron Resonance Mass Spectrometry
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作者：Xu Zhao ; Quan Shi ; Murray R. Gray 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2014
卷号：4
DOI：10.1038/srep05373
出版社：Springer Nature
摘要：Metalloporphyrins are ubiquitous in nature, particularly iron porphyrins (hemes) and magnesium dihydroporphyrins or chlorophylls. Oxovanadium (IV) complexes of alkyl porphyrins are widely distributed in petroleum, oil shales and maturing sedimentary bitumen. Here we identify new vanadium compounds in Venezuela Orinoco heavy crude oil detected by Fourier transform-ion cyclotron resonance mass spectrometry (FT-ICR MS). These compounds likely have the main structure of porphyrin, with the addition of more aromatic rings, thiophene and amino functional groups, corresponding to molecular series of C_nH_2n-40N₄V₁O₁ (36 ≤ n ≤ 58),C_nH_2n-42N₄V₁O₁ (37 ≤ n ≤ 57),C_nH_2n-44N₄V₁O₁ (38 ≤ n ≤ 59),C_nH_2n-46N₄V₁O₁ (43 ≤ n ≤ 54),C_nH_2n-48N₄V₁O₁ (45 ≤ n ≤ 55),C_nH_2n-38N₄V₁S₁O₁ (36 ≤ n ≤ 41),C_nH_2n-40N₄V₁S₁O₁ (35 ≤ n ≤ 51),C_nH_2n-42N₄V₁S₁O₁ (36 ≤ n ≤ 54),C_nH_2n-44N₄V₁S₁O₁ (41 ≤ n ≤ 55),C_nH_2n-46N₄V₁S₁O₁ (39 ≤ n ≤ 55),C_nH_2n-27N₅V₁O₁ (29 ≤ n ≤ 40),C_nH_2n-29N₅V₁O₁ (34 ≤ n ≤ 42),C_nH_2n-33N₅V₁O₁ (31 ≤ n ≤ 38),C_nH_2n-35N₅V₁O₁ (32 ≤ n ≤ 41),C_nH_2n-27N₅V₁O₂ (32 ≤ n ≤ 41) and C_nH_2n-29N₅V₁O₂ (33 ≤ n ≤ 42) . These findings are significant for the understanding of the existing form of vanadium species in nature, and are helpful for enhancing the amount of information on palaeoenvironments and improving the level of applied basic theory for the processing technologies of heavy oils.