Insights into asphaltene aggregate structure using ultrafast MAS solid-state ¹H NMR spectroscopy

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• 作者：R. Dutta Majumdar^a ; ^b ; ¹ ; T. Montina^a ; ^b ; O.C. Mullins^c ; ^{mullins1@slb.com} ; M. Gerken^a ; ^b ; P. Hazendonk^a ; ^b ; ^{paul.hazendonk@uleth.ca}
• 关键词：Asphaltenes ; Solid-state 1H NMR ; Ultrafast MAS ; Relaxation
• 刊名：Fuel
• 出版年：2017
• 出版时间：1 April 2017
• 年：2017
• 卷：193
• 期：Complete
• 页码：359-368
• 全文大小：1976 K
• 卷排序：193

文摘

First ultrafast MAS solid-state 1H NMR study of asphaltenes. High spin-rate allows detection of otherwise obscure signals. Double Quantum correlation and T2 relaxation experiments help elucidate asphaltene aggregate structure. Asphaltenes mostly consist of large single-core PAHs. Nanoaggregation occurs through π-π interactions, and clusters consist of a rigid central core and a mobile periphery.