Abstract
Abstract D-NMR was clearly observed from the concentrated dichloromethane solution of PBLG (0.346 gr/ml), in which helical PBLG polymers form a cholesteric state in case of no magnetic field. The observed spectrum was decomposed into a singlet and five doublets, among which the doublet having smallest separation was stronger than the singlet and the rests. Since the doublets originate from the quadrupolar splitting of the Zeeman level of deuteron, the observed doublets mean the partial alignments of the benzyl groups in the liquid crystalline state. The order parameters were estimated as 0.0040, 0.025, 0.072, 0.10, and 0.13 from the observed splittings of the five doublets and e2qQ = 167 KHz for a static C-D bond. The singlet means complete averaging of the quadrupolar splitting due to a rapid motion. By rotating the sample about the axis perpendicular to the magnetic field, the observed separation of the strongest doublet was changed immediately after the rotation and reached to the former equilibrium va...
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