CAJ | 학술논문

利用核磁共振化学位移变化,自旋-自旋弛豫和2D NOESY(two-dimensional nuclear Overhauser enhancement spectroscopy)研究了一系列新合成的双取代烷基苯磺酸盐的胶束化.结果表明,邻位取代的是正烷烃链,间位取代的是支烷烃链.而且,邻位取代的烷烃链越长,参与形成胶束疏水核表面层的亚甲基个数越多.因此,每个分子在饱和吸附的油水界面上的面积越大.间位取代的分支链在胶束疏水核中堆积得没有邻位取代的正烷烃链紧密.分支链越短,堆积得越不紧密.描述了胶束中分子的相对排列.
이용핵자공진화학위이변화,자선-자선이예화2D NOESY(two-dimensional nuclear Overhauser enhancement spectroscopy)연구료일계렬신합성적쌍취대완기분광산염적효속화.결과표명,린위취대적시정완경련,간위취대적시지완경련.이차,린위취대적완경련월장,삼여형성효속소수핵표면층적아갑기개수월다.인차,매개분자재포화흡부적유수계면상적면적월대.간위취대적분지련재효속소수핵중퇴적득몰유린위취대적정완경련긴밀.분지련월단,퇴적득월불긴밀.묘술료효속중분자적상대배렬.
Micellization of a series of newly synthesized dialkyl benzene sulfonates was studied using proton chemical shift changes, spin-lattice, and spin-spin relaxation NMR spectroscopy, and two-dimensional nuclear Overhauser enhancement spectroscopy (2D NOESY). The o-substituted chains are normal alkyl chains with varying lengths, and the m-substituted ones are branched alkyl chains. The results showed that the longer the o-substituted normal alkyl chain, protons of more methylene groups participated in the formation of the rigid surface layer of the hydrophobic micellar core. Consequently, the larger was the area per molecule adsorbed on the interface between oil and water at saturation. The branched m-substituted alkyl chains of the dialkyl benzene sulfonates were less tightly packed than the o-substituted normal alkyl chains in the hydrophobic micellar cores. The shorter the m-substituted branched alkyl chains, the looser they were packed in the hydrophobic micellar core. The relative arrangement of the surfactant molecules in the micelles was elucidated.