沉积学报2025，Vol.43Issue(4)：1264-1274,11.DOI:10.14027/j.issn.1000-0550.2024.029
大环烷烃类生物标志物研究进展
A Review of Macrocyclic Alkanes
摘要
Abstract
[Significance]Macrocyclic alkanes are monocyclic saturated hydrocarbons with more than ten ring car-bons(n>10).They have been detected in oil shales,crude oils,soils and higher plants,carry unambiguous biologi-cal source information,thus serving as precise proxies for original depositional environments.Their carbon-number distribution is variable,and they co-elute at regular intervals with long-chain alkyl alkenes and alkyl cyclohexanes.Moreover,their mass-spectrometric molecular ions(CnH2n)and diagnostic fragment ions(m/z 97,111,125)are identical to those compounds,making misidentification common.Accurate structural characterization is there-fore urgently needed.[Progress]We conducted a comprehensive literature review and isolated individual macrocyclic alkanes from torbanite of the Sydney Basin,Australia.High-resolution nuclear magnetic resonance(NMR)spectros-copy elucidated their unique monocyclic saturated skeletons.By analogy with cyclohexane fragmentation,three domi-nant mass-spectrometric cleavage pathways were proposed,fully explaining the genesis of the characteristic frag-ments.Possible biochemical synthesis pathway was synthesized from previous reports.[Conclusions and Prospects]NMR analyses confirm that macrocyclic alkanes possess distinctive monocyclic saturated structures.In torbanite,those derived from Botryococcus appear to originate from long-chain oleic acid that cyclizes via long-chain unsaturat-ed polyaldehyde intermediates.Future work should refine the biosynthetic pathways for higher-plant-derived macrocy-clic alkanes,establish relevant ratio parameters,and apply them to geological samples.关键词
大环烷烃类化合物/torbanite/NMR结构鉴定/质谱碎片断裂规律/生物化学合成途径Key words
macrocyclic alkanes/torbanite/nuclear magnetic resonance(NMR)structure identification/mass spectrum(MS)fragmentation/biochemical synthesis pathway分类
天文与地球科学引用本文复制引用
孟宪新,卢鸿,敖添,彭平安..大环烷烃类生物标志物研究进展[J].沉积学报,2025,43(4):1264-1274,11.基金项目
多圈层作用油气富集理论项目(THEMSIE04010104) （THEMSIE04010104）
国家自然科学基金项目(41973069,41673045)Theory of Hydrocar-bon Enrichment under Multi-Spheric Interactions of the Earth,No.THEMSIE04010104 （41973069,41673045）
National Natural Science Foundation of China,No.41973069,41673045 （）
