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利用17O-NMR化学位移、半峰宽和核磁共振系数(B’)与水团簇结构和水分子缔合的关系,分析了CuCl2和CuSO4对水结构的影响.同时比较了纯水和不同浓度CuCl2和CuSO4溶液的羟基伸缩振动拉曼光谱.研究表明,CuCl2和CuSO4均具有促进水分子缔合,使水团簇加大的作用,且CuSO4对水的缔合作用大于CuCl2,Cl-对水缔合的破坏作用大于SO42-·Cu2+作为顺磁离子,在核磁共振弛豫过程中,对缩短水中质子的自旋-晶格弛豫时间,使谱线变宽作用明显.拉曼光谱主要反映阴离子对水结构的影响,而17O-NMR方法能够全面反映阴、阳离子和化合物对水缔合程度的影响.
The effect of CuCl2 and CuSO4 on the water structure was analyzed by using 17O-NMR chemical shift, half-width, and nuclear magnetic resonance (B ’) correlation with water cluster structure and water molecules. The effects of pure water and different concentrations CuCl2 and CuSO4 solutions of hydroxyl stretching vibration Raman spectroscopy studies have shown that both CuCl2 and CuSO4 have to promote the association of water molecules to make the water cluster increases the role of CuSO4 and water association is greater than CuCl2, The destructive effect of association is greater than that of SO42- · Cu2 + as paramagnetic ion, which can obviously widen the spectrum of spin-lattice relaxation time of proton in water during NMR relaxation. Raman spectrum mainly reflects Anion on the water structure, and 17O-NMR method can fully reflect the anion, cation and compound on the degree of water association.