摘要
利用傅里叶变换红外光谱法研究了稀土离子Ｓｍ３＋、Ｇｄ３＋、Ｅｒ３＋和Ｙｂ３＋与二棕榈酰磷脂酰胆碱脂质体的相互作用．结果表明：稀土离子同磷脂极性头部的Ｐｏ２－和Ｎ＋（ＣＨ３）３基团间有较强的静电作用，而且这些作用随着稀土离子摩尔比例的增大而加强．稀土离子与磷脂相互作用程度按稀土离子原子序数增大即Ｓｍ＜３＋＜Ｇｄ３＋＜Ｅｒ３＋＜Ｙｂ３＋的顺序排列．
Abstract Fourier transform infrared spetroscopy was used to Study the molecular interactions between Sm3+. Gd3+. Er3+and Yb3+and DPPC in cast dry film. The results indicate that Ln3+ have electrostatic interactions with DPPC multibilayer dry film. On raising the Ln3+molecular ratio, the interactional degree was increasing; Meanwhile the electrostatic interactions become stronger in the order of Sm3+ < Gd3+<Er3+ <Yb3+.
