High-speed 1H MAS NMR investigations of the weathered surface of a phosphate glass.
High-speed 1H MAS NMR investigations of the weathered surface of a phosphate glass.
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DOI：
10.1016/j.ssnmr.2004.08.006
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发表时间：
2005
影响因子：
3.2
通讯作者：
T. Alam;B. Tischendorf;R. Brow
中科院分区：
文献类型：
--
作者：
T. Alam;B. Tischendorf;R. Brow
使用固态高速 1H MAS NMR 光谱研究暴露于潮湿环境的磷酸钾铝 (KAP) 玻璃的风化表面 (30K2Oradical dot10Al2O3radical dot60P2O5, mol%)。通过自旋-自旋弛豫和双量子 (DQ) 过滤的结合，可以解析 KAP 玻璃风化表面内的七种或八种不同的质子环境。进行二维 (2D) DQ 和 2D NOESY NMR 相关实验来探测这些不同质子物种的空间邻近性。这些 1H-1H 相关实验有助于确认光谱分配。对这些不同 1H 环境的分析提供了有关风化玻璃表面发生的化学过程的附加信息。
Solid-state high-speed 1H MAS NMR spectroscopy was used to investigate the weathered surface of a potassium aluminum phosphate (KAP) glass exposed to a humid environment (30K2Oradical dot10Al2O3radical dot60P2O5, mol%). Through the combination of spin-spin relaxation and double quantum (DQ) filtering it was possible to resolve seven or eight different proton environments within the weathered surface of the KAP glass. Two-dimensional (2D) DQ and 2D NOESY NMR correlation experiments were performed to probe the spatial proximity of these different proton species. These 1H-1H correlation experiments helped confirm the spectral assignments. The analysis of these different 1H environments provides additional information about the chemical processes that occur at the weathered glass surface.