LiNO_3在DMF中的离子溶剂化和离子缔合的红外光谱

ATR-FTIR Study on Ionic Solvation and Ion Association of Lithium Nitrate in N,N-dimethylformamide

利用ATRFTIR光谱技术研究了硝酸锂在N,N二甲基甲酰胺(DMF)中的离子溶剂化和离子缔合,DMF分子中羰基伸缩振动谱带的移动和OCN变形振动谱带分裂表明,锂离子与溶剂分子之间发生了强烈的相互作用。这种相互作用是通过DMF分子中的氧原子进行的,定量计算了锂离子的溶剂化数。NO-3的ν2谱带变化证明了溶液中离子对的存在,利用光谱曲线拟合技术确定了溶液中离子的存在状态(接触离子对、自由离子)。

The solvation number of lithium cation and ion association of lithium nitrate in N,N dimethylformamide(DMF) have been investigated by ATR FTIR spectroscopy. Splittings of OCN deformation and shift of carbonyl stretching band of DMF suggest that there is a strong interaction between oxygen atoms of DMF and lithium cations. The solvation numbers of lithium ion have been calculated quantitatively based on these facts. The band fitting for the ν 2 (NO out of plane bending ) band of the NO - 3 shows free anions ...