NMR Spectroscopy of the Hydrated Layer of Composite Particles Based on Nanosized Al2O3 and Vitreous Humor

作者：Turov V V^*; Gerashchenko I I; Markina A I

来源：Journal of Applied Spectroscopy, 2013, 80(5): 663-669.

DOI：10.1007/s10812-013-9824-2

• NMR spectra
• nanosized Al2O3
• vitreous humor
• composite
• cluster
• strongly and weakly bound water
• strongly and weakly associated water

The hydrated layer of composite particles prepared using Al2O3 and cattle vitreous humor was investigated using NMR spectroscopy. It was found that water bound to Al2O3 nanoparticles was present in the form of clusters with different degrees of association and energies of interaction with the surface. Water bound to the surface of the Al2O3/vitreous humor composite became more uniform upon immobilization of vitreous humor components on the surface of the Al2O3. With this, the clusters of adsorbed water had characteristics that were close to those found in air and weakly polar CHCl3 media. Addition of polar CH3CN led to the formation of very small water clusters. PMR spectra of the surface of the Al2O3/vitreous humor composite in the presence of trifluoroacetic acid differentiated four types of hydrated structures that differed in the degree of water association.

• 出版日期2013-11