Kovalakova M, Grobet P J
Centrum voor Oppervlaktechemie en Katalyse, K.U. Leuven, Belgium.
Solid State Nucl Magn Reson. 1997 Dec;9(2-4):107-13. doi: 10.1016/s0926-2040(97)00050-7.
27Al double rotation (DOR) NMR spectroscopy has been applied to investigate the framework ordering in the aluminophosphate molecular sieve AlPO4-8 during the hydration process. Relative well-resolved peaks in the DOR spectra of both dehydrated and successively rehydrated AlPO4-8 allow the isotropic shifts and the quadrupolar shifts to be correlated with the local framework structure. The rather complex interaction of water with AlPO4-8 occurs in a specific way, not randomly. For dehydrated AlPO4-8 efforts are shown to correlate respectively the isotropic shifts to the mean Al-O-P angles and the quadrupolar coupling constants to the shear strains of the different aluminium sites.
27Al双旋转（DOR）核磁共振光谱已被用于研究磷酸铝分子筛AlPO4 - 8在水合过程中的骨架有序性。脱水和连续再水合的AlPO4 - 8的DOR光谱中相对分辨率良好的峰使得各向同性位移和四极位移能够与局部骨架结构相关联。水与AlPO4 - 8之间相当复杂的相互作用以特定方式发生，并非随机发生。对于脱水的AlPO4 - 8，研究表明各向同性位移分别与平均Al - O - P角相关，四极耦合常数与不同铝位点的剪切应变相关。
