抄録
31P and 13C NMR are observed for a smectic A phase of hexakis(4-(4'-dodecyl)-biphenoxy)cyclotetraphosphazene. In an intense magnetic field, the long axes of biphenylene fragments and alkyl chains align along the magnetic field, and the cyclotriphosphazene(ctp) ring-normal points preferentially at the same direction. Orientational order parameter for inorganic moiety (ctp fragment) and that for organic moiety (biphenylene fragment) are determined independently from 31P and 13C NMR spectroscopies. The two order parameters are revealed to take the same value of 0.45. which is smaller than that of the conventional smectic A liquid crystals consisting of small organic molecules. Contrasting shielding axis for 31P lies on the ctp ring normal, while that for aromatic 13C lies along the line connecting the two phenylene rings.
