ausblenden:
Schlagwörter:
1H; 2H; alignment medium; cromolyn; gelatin; NMR; polymer-dispersed liquid crystals; residual dipolar couplings; spatially selective NMR
Zusammenfassung:
In this study, aqueous blends of cromolyn and gelatin (“cromogels”) are introduced as anisotropic media. The addition of gelatin enables an advantageous adjustability of the strength, the homogeneity, and the stability of the cromolyn alignment. The mechanical stability of these polymer‐dispersed liquid crystals is further utilized by stacking layers of D2O/cromolyn/gelatin with varying component ratio. The resulting distinct phases with correspondingly different degrees of alignment can be targeted by spatially resolved NMR techniques. As a case study, we investigated sucrose in a two‐phase system with neat D2O and analyte layered over the anisotropic medium. A recently presented spatially selective coupled‐type HSQC experiment allows the determination of one‐bond C‐H splitting in both phases.
