| Title | A proton nuclear magnetic resonance relaxation study of C12E6/D2O |
| Publication Type | Journal Article |
| Year of Publication | 2000 |
| Authors | Burnell, EE, Capitani, D, Casieri, C, Segre, AL |
| Journal | Journal of Physical Chemistry B |
| Volume | 104 |
| Pagination | 8782-8791 |
| Date Published | Sep |
| Type of Article | Article |
| ISBN Number | 1089-5647 |
| Keywords | CHAIN, CYCLING, LYOTROPIC LIQUID-CRYSTAL, NMR-RELAXOMETRY, PHASES, POTASSIUM PALMITATE, REPTATION, SPIN-LATTICE RELAXATION, SURFACTANTS, SYSTEM, WATER |
| Abstract | Aqueous solutions of the nonionic surfactant, n-dodecylhexaoxyethylene glycol [C12H25(OCH2CH2)(6)OH], termed C12E6, form various phases at room temperature: there is a micellar phase at high water content, hexagonal, cubic, and lamellar mesophases at intermediate water contents, and an isotropic phase at very low water content. Proton nuclear magnetic resonance (NMR) T-1(-1) relaxation rates have been measured for the C12E6/D2O system as a function of composition, spectral frequency, and temperature. The results are interpreted in terms of the possible molecular motions for the C12E6 molecule in the different phases. A review of relaxation theory is presented with special attention to molecular exchange between sites that are associated with different relaxation rates. |
| URL | <Go to ISI>://000089383600004 |
