Structure of Ternary Aluminum Metaphosphate Glasses
Structure of Ternary Aluminum Metaphosphate Glasses
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DOI：
10.1021/jp205700j
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发表时间：
2011-10
影响因子：
3.7
通讯作者：
J. Tsuchida;J. Schneider;M. T. Rinke;H. Eckert
中科院分区：
文献类型：
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作者：
J. Tsuchida;J. Schneider;M. T. Rinke;H. Eckert
使用一组 31P、27Al 和 23Na 高分辨率 NMR 和 X 射线光电子能谱分析系统 (1 – x)NaPO3·xAl(PO3)3、(1 – x)KPO3·xAl(PO3)3 和 (1 – x)Pb(PO3)2·xAl(PO3)3 (0 ≤ x ≤ 1) 中的三元偏磷酸盐玻璃 技术，以确定磷酸盐形态以及 P 和 Al 连接的短程和中程有序特性。 O-1s XPS 数据证实，对于所有玻璃，连接两个磷的氧原子数量仍然接近 33%，这与 Q2 单元的唯一存在一致，与 31P MAS NMR 数据一致。随着 x 的增加，Al-O-P 键的形成不断增加，这由一个新的 O-1s 峰表明，结合能接近 532 eV，并且 31P MAS NMR 化学位移发生了系统变化。通过 31P MAS NMR 和 31P{27Al} REAPDOR 实验分析 Q2m 磷酸基团的存在（m 是每个四面体 P-O-Al 键的数量，0 ≤ m ≤ 2）。 REDOR 技术应用于异核自旋系统 31P/27Al 和 31P/23Na...
Ternary metaphosphate glasses in the systems (1 – x)NaPO3·xAl(PO3)3, (1 – x)KPO3·xAl(PO3)3, and (1 – x)Pb(PO3)2·xAl(PO3)3 (0 ≤ x ≤ 1) were analyzed using a set of 31P, 27Al, and 23Na high-resolution NMR and X-ray photoelectron spectroscopy techniques, to determine the phosphate speciation and the short- and medium-range order properties of the P and Al connectivity. O-1s XPS data confirm that the number of oxygen atoms linking two phosphorus remains close to 33% for all of the glasses, consistent with the exclusive presence of Q2 units, in agreement with 31P MAS NMR data. The increasing formation of Al–O–P linkages with increasing x is indicated by a new O-1s peak, with binding energies near 532 eV, and systematic changes in the 31P MAS NMR chemical shifts. The presence of Q2m phosphate groups (m being the number of P–O–Al bonds per tetrahedron, 0 ≤ m ≤ 2) was analyzed by 31P MAS NMR and 31P{27Al} REAPDOR experiments. The REDOR technique was applied to the heteronuclear spin systems 31P/27Al and 31P/23Na,...