| Popis: |
The 1H NMR spectra of guest molecules, n-paraffins (n-C5H12, n-C6H14, n-C7H16, n-C9H20, nC10H22, nC11H24, n-C12H26, n-C15H32, n-C16H34, n-C21H44 and n-C22H46), were measured in poly(γ-benzyl-L-glutamate) liquid crystalline solution. The methylene signal of n-paraffins is a doublet due to magnetic dipole-dipole interaction. These results suggest that an n-paraffin takes predominantly the extended form in the restricted molecular motion state and that its long axis orients in the same direction as the helical axis of poly(γy-benzyl-L-glutamate) parallel to the magnetic field. The results are compared with the molecular motion and conformation of η n-paraffins in α-chloronaphthalene. |
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