Vass Szabolcs, Grimm Hans, Bányai István, Meier Gerhard, Gilányi Tíbor
J Phys Chem B. 2005 Jun 23;109(24):11870-4. doi: 10.1021/jp051716p.
Slowly diffusing water molecules were found by quasi-elastic neutron scattering (QENS) in a sodium dodecyl sulfate (SDS) micellar solution, and both their diffusion coefficient (4.33 x 10(-6) cm2 x s(-1)) and mole fraction (0.057) were determined. After successfully checking the mean slowing down of solvent molecules by the gradient compensated stimulated spin-echo (GCSTE) pulse sequence NMR method, a similar effect was observed with this technique in the solvent phase of dodecyl trimethylammonium bromide (DTAB) and differing chain length (X = 12, 20, 30, and 40) ethoxylated nonyl phenol (9NX) micellar systems. Following the literature, the experimental results are qualitatively explained by assuming that, apart from ionic hydration, H-bonds may form between the solvent molecules and the O or N atoms present in the hydrophilic (head)groups of the micelle-forming monomers.
通过准弹性中子散射（QENS）在十二烷基硫酸钠（SDS）胶束溶液中发现了缓慢扩散的水分子，并测定了它们的扩散系数（4.33×10⁻⁶ cm²·s⁻¹）和摩尔分数（0.057）。在用梯度补偿受激自旋回波（GCSTE）脉冲序列核磁共振方法成功检测到溶剂分子的平均减速后，用该技术在十二烷基三甲基溴化铵（DTAB）和不同链长（X = 12、20、30和40）的乙氧基化壬基酚（9NX）胶束体系的溶剂相中观察到了类似的效应。根据文献，通过假设除了离子水合作用外，溶剂分子与形成胶束的单体的亲水（头部）基团中存在的O或N原子之间可能形成氢键，对实验结果进行了定性解释。
