Deuteron magnetic resonance studies of water associated with phospholipids

✍ Scribed by N.J. Salsbury; A. Darke; D. Chapman

• Publisher: Elsevier Science
• Year: 1972
• Tongue: English
• Weight: 383 KB
• Volume: 8
• Category: Article
• ISSN: 0009-3084
• DOI: 10.1016/0009-3084(72)90026-6

✦ Synopsis

DMR spectra have been studied with some lecithin--D~O systems.

For low hydrations the quadrupole coupling constants are less than 3 KHz depending on the concentrations of the aqueous deuterons and the temperature. The reduction of the quadrupole coupling constant from 200 KHz characteristic of simple crystalline hydrates is interpreted in terms of rapid but anisotropic reorientation of the DeO molecules associated with the lecithin polar groups.

At a higher hydration (21 moles D20 per mole), the splittings are absent. The spectra are then interpreted as characteristic of rapid and isotropic reorientation of the D20 molecules for both the gel and liquid crystalline phases.

Zero coupling constants are observed with the isotropic cubic phase.