Utz M, Eisenegger J, Suter U W, Ernst R R
Laboratorium für physikalische Chemie und, Eidgenössische Technische Hochschule, Zürich, CH-8092, Switzerland.
J Magn Reson. 1997 Oct;128(2):217-27. doi: 10.1006/jmre.1997.1222.
A method is proposed for the quantitative measurement of orientational anisotropy in glassy solids based on 2D dipolar NMR spectra with sample flipping (dipolar DECODER experiment). Purely dipolar spectra are obtained by chemical shift refocusing by a multiple pulse sequence. The experiment is applied to an investigation of a doubly 13C-labeled sample of bisphenol-A polycarbonate deformed in a channel-die apparatus. The orientational distribution function is determined by an expansion of the distribution in terms of spherical harmonics up to degree four.
提出了一种基于带有样品翻转的二维偶极核磁共振谱（偶极DECODER实验）对玻璃态固体中的取向各向异性进行定量测量的方法。通过多脉冲序列进行化学位移重聚焦获得纯偶极谱。该实验应用于研究在通道模装置中变形的双13C标记的双酚A聚碳酸酯样品。通过将分布展开为高达四阶的球谐函数来确定取向分布函数。
