Mironenko Roman M, Belskaya Olga B, Talsi Valentin P, Likholobov Vladimir A
Institute of Hydrocarbons Processing, Siberian Branch of Russian Academy of Sciences, Neftezavodskaya st., 54, 644040 Omsk, Russia; Omsk F.M. Dostoevsky State University, pr. Mira, 55a, 644077 Omsk, Russia.
Institute of Hydrocarbons Processing, Siberian Branch of Russian Academy of Sciences, Neftezavodskaya st., 54, 644040 Omsk, Russia; Omsk State Technical University, pr. Mira, 11, 644050 Omsk, Russia.
Solid State Nucl Magn Reson. 2014 Oct-Nov;63-64:37-41. doi: 10.1016/j.ssnmr.2014.10.001. Epub 2014 Oct 18.
The Pearson IV function was used to fit the asymmetric solid-state (27)Al NMR spectra of alumina based catalysts. A high convergence (correlation coefficient is no less than 0.997) between experimental and simulated spectra was achieved. The decomposition of the (27)Al NMR spectra of zinc/aluminum mixed oxides with different Zn/Al molar ratio revealed an increased fraction (6-9%) of pentacoordinated aluminum atoms in these oxides as compared to γ-Al2O3. As the Zn/Al ratio is raised, the fraction of [AlO6] octahedral units decreases, while the fraction of [AlO4] tetrahedra increases.
采用Pearson IV函数对氧化铝基催化剂的非对称固态（27）Al NMR谱进行拟合。实验光谱与模拟光谱之间实现了高度收敛（相关系数不小于0.997）。对不同Zn/Al摩尔比的锌/铝混合氧化物的（27）Al NMR谱进行分解，结果表明，与γ-Al2O3相比，这些氧化物中五配位铝原子的比例增加（6-9%）。随着Zn/Al比的提高，[AlO6]八面体单元的比例降低，而[AlO4]四面体的比例增加。
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