Scholarlink

<p>Nuclear magnetic resonance (NMR) spin–spin <i>T</i><sub>2</sub> relaxation is applied to characterize structural rearrangements in solid–solid phase transitions of lipids. 1D <i>T</i><sub>2</sub> relaxation distributions as a function of temperature indicate solid–solid transitions not easily discernible by differential scanning calorimetry (DSC). <i>T</i><sub>2</sub>–<i>T</i><sub>2</sub> correlation exchange measurements are demonstrated to be sensitive to spin-diffusion, allowing measurement of morphological length scales related to solid–solid molecular structure rearrangement by NMR relaxometry. <i>T</i><sub>2</sub> dispersion distributions indicate radio frequency pulse separation time dependence which alters with morphology and temperature. The NMR relaxometry data are complementary to DSC and has potential for bench top low field NMR implementation.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Observing Solid–Solid Phase Transitions in Two Alkanes and Natural Wax with Multidimensional NMR Relaxometry

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年2月12日

查看全文
  • Madison L. Nelson,
  • Linn W. Thrane,
  • Sarah L. Codd,
  • Jonathan L. Cape,
  • Christopher D. Craig,
  • Amanda Pluntze,
  • Joseph D. Seymour

摘要

Nuclear magnetic resonance (NMR) spin–spin T2 relaxation is applied to characterize structural rearrangements in solid–solid phase transitions of lipids. 1D T2 relaxation distributions as a function of temperature indicate solid–solid transitions not easily discernible by differential scanning calorimetry (DSC). T2–T2 correlation exchange measurements are demonstrated to be sensitive to spin-diffusion, allowing measurement of morphological length scales related to solid–solid molecular structure rearrangement by NMR relaxometry. T2 dispersion distributions indicate radio frequency pulse separation time dependence which alters with morphology and temperature. The NMR relaxometry data are complementary to DSC and has potential for bench top low field NMR implementation.