源自碱性丁二酸铝的氧化铝的固态27Al和交叉极化13C魔角旋转核磁共振表征
Solid-state 27Al and cross-polarization 13C magic-angle spinning nuclear magnetic resonance characterisation of aluminas derived from basic aluminum succinate.
作者信息
Rao P K, Sivaraj C, Reddy G K, Rao V V, Mastikhin V M
机构信息
Catalysis Section, Indian Institute of Chemical Technology, Hyderabad.
出版信息
Solid State Nucl Magn Reson. 1994 Feb;3(1):39-42. doi: 10.1016/0926-2040(94)90050-7.
Solid-state 27Al and cross-polarization (CP) 13C magic-angle spinning nuclear magnetic resonance (MAS NMR) was used to characterise aluminas obtained by calcining basic aluminium succinate at different temperatures. In basic aluminium succinate, aluminium is in the tetrahedral coordination only. However, in both X-ray amorphous and gamma-aluminas aluminium is in the tetrahedral and octahedral coordination. The intensity of the aluminium peaks is at a maximum for samples calcined at 700 degrees C. 13C CP MAS NMR indicates the bonding of Al with carbon of the carboxylate group in basic aluminium succinate. Samples calcined at 400-870 degrees C do not give 13C spectra.
采用固态27Al和交叉极化（CP）13C魔角旋转核磁共振（MAS NMR）对不同温度下煅烧碱式琥珀酸铝所制得的氧化铝进行表征。在碱式琥珀酸铝中，铝仅处于四面体配位状态。然而，在X射线非晶态氧化铝和γ-氧化铝中，铝处于四面体和八面体配位状态。对于在700℃煅烧的样品，铝峰强度最大。13C CP MAS NMR表明碱式琥珀酸铝中铝与羧酸根基团的碳之间存在键合。在400 - 870℃煅烧的样品未给出13C谱图。
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