乙醇溶液中卵磷脂的磷-31研究。

Phosphorus-31 studies on lecithin in ethanol solutions.

作者信息

Klose G

出版信息

Chem Phys Lipids. 1975 Sep;15(1):9-14. doi: 10.1016/0009-3084(75)90026-2.

Abstract

31P relaxation times of lecithin in ethanol solutions have been measured in dependence on temperature and water concentration. Trial calculations have been carried out on the assumption of a 2-site exchange model. The results suggest first, the relaxation behaviour is determined by various motional and exchange processes; second, at 29 MHz the dipole-dipole interaction between 31P and protons provides the dominant contribution; third, in general we are not concerned with the case of "extreme narrowing". Morover, there are no negligible intermolecular contributions to relaxation.

摘要

已测量了乙醇溶液中卵磷脂的31P弛豫时间与温度和水浓度的关系。基于双位点交换模型进行了试算。结果表明，首先，弛豫行为由各种运动和交换过程决定；其次，在29MHz时，31P与质子之间的偶极-偶极相互作用起主要作用；第三，一般来说，我们不涉及“极限窄化”的情况。此外，分子间对弛豫的贡献不可忽略。